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    Anionic-cationic surfactant mixture providing the electrically controlled homeotropic surface anchoring of liquid crystals / M. N. Krakhalev [et al.] // J. Mol. Liq. - 2019. - Vol. 282: Suzdal Conference (2018, Suzdal, RUSSIA). - P. 57-62, DOI 10.1016/j.molliq.2019.02.132. - Cited References: 30. - The reported study was supported by the Belarusian Republican Foundation for Fundamental Research (project No X16P-110) and Russian Foundation for Basic Research (RFBR) (project No 16-53-00073). Mikhail N. Krakhalev and Vitaly S. Sutormin acknowledge financial support from RFBR, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science (project No 18-42-243006). . - ISSN 0167-7322. - ISSN 1873-3166
   Перевод заглавия: Смесь анионного и катионного сурфактантов, обеспечивающая электроуправляемое гомеотропное поверхностное сцепление в жидких кристаллах

РУБ Chemistry, Physical + Physics, Atomic, Molecular & Chemical
Рубрики:
IONIC MODIFICATION
   TRANSITION
   DROPLETS
   CONFIGURATION
   LAYER
Кл.слова (ненормированные):
Polymer dispersed liquid crystal -- Nematic droplet -- Ionic surfactant -- Anchoring transition -- Director configuration -- Optical texture
Аннотация: In search of a substance able to function as an anionic surfactant applied for the electrically-induced anchoring transitions in liquid crystals, the compound 4-heptyloxybenzoate benzyl dodecyldimethylammonium (HOBBDDA) has been synthesized. Its orienting influence on nematic liquid crystal 4-pentyl-4'-cyanobiphenyl (5CB) has been tested. HOBBDDA dissolved up to 1.4%in 50 droplets dispersed in polymer film does not change the tangential surface anchoring inherent to polyvinyl alcohol matrix used. Homeotropic surface anchoring is realized if the HOBBDDA content exceeds 1.7%. The molecules of the surfactant in 5CB dissociate into anions and cations. The anions modify the surface anchoring under the action of DC electric field both in the normal and inverse mode. The mixture of HOBBDDA and cetyltrimethylammonium bromide can function as a binary ionic cationic surfactant which significantly expands the prospects for using the ionic-surfactant method to control liquid crystal materials. (C) 2019 Elsevier B.V. All rights reserved.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.
Belarusian State Technol Univ, Minsk 220006, BELARUS.

Доп.точки доступа:
Krakhalev, M. N.; Крахалев, Михаил Николаевич; Sutormin, V. S.; Сутормин, Виталий Сергеевич; Prishchepa, O. O.; Прищепа, Оксана Олеговна; Kuz'menok, N. M.; Mikhalyonok, S. G.; Bezborodov, V. S.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Belarusian Republican Foundation for Fundamental Research [X16P-110]; Russian Foundation for Basic Research (RFBR) [16-53-00073]; RFBR, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science [18-42-243006]; International conference on Hole Burning, Single Molecule, and Related Spectroscopies: Science and Applications - 2018(XIII ; August 6-12, 2018 ; Suzdal - Moscow, Russia)
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Hydrogen bond effects in multimode nuclear dynamics of acetic acid observed via resonant x-ray scattering / V. Savchenko, V. Ekholm, I. E. Brumboiu [et al.] // J. Chem. Phys. - 2021. - Vol. 154, Is. 21. - Ст. 214304, DOI 10.1063/5.0049966. - Cited References: 64. - This work was supported by the Swedish Research Council (Grant Nos. 2019-03470, 2018-4343, and 2017-06419) and the Russian Science Foundation (Project No. 16-12-10109). M.O. acknowledges financial support from the Carl Tryggers Foundation (Grant CTS18:285) and the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Grant Agreement No. 860553. F.G. acknowledges the support from the Helmholtz Virtual Institute VI419 “Dynamic Pathways in Multidimensional Landscapes.” The research work of V.S. was partially funded by a Swedish Institute scholarship. The synchrotron experiments were performed at the ADRESS beamline of the Swiss Light Source at the Paul Scherrr Institut (PSI). The work at PSI was supported by the Swiss National Science Foundation through the NCCR MARVEL and the Sinergia project “Mott Physics Beyond the Heisenberg (MPBH) model” (SNSF Research Grant Nos. CRSII2:141962 and CRSII2:1607651). The research leading to these results received funding from the European Community’s Seventh Framework Programme (No. FP7/2007–2013) under Grant Agreement No. 290605 (COFUND: PSIFELLOW). The calculations were enabled by resources provided by the Swedish National Infrastructure for Computing (SNIC) partially funded by the Swedish Research Council through Grant Agreement No. 2018-05973 . - ISSN 0021-9606
Кл.слова (ненормированные):
Acetic acid -- Degrees of freedom (mechanics) -- Dimers -- Hydrogen bonds -- Liquids -- pH -- Comprehensive analysis -- Hydrogen-bond effect -- Hydrogen-bond formation -- Resonant inelastic x-ray scattering -- Resonant X-ray scattering -- Theoretical simulation -- Vibrational degrees of freedom -- Vibrational dynamics -- X ray scattering
Аннотация: A theoretical and experimental study of the gas phase and liquid acetic acid based on resonant inelastic x-ray scattering (RIXS) spectroscopy is presented. We combine and compare different levels of theory for an isolated molecule for a comprehensive analysis, including electronic and vibrational degrees of freedom. The excitation energy scan over the oxygen K-edge absorption reveals nuclear dynamic effects in the core-excited and final electronic states. The theoretical simulations for the monomer and two different forms of the dimer are compared against high-resolution experimental data for pure liquid acetic acid. We show that the theoretical model based on a dimer describes the hydrogen bond formation in the liquid phase well and that this bond formation sufficiently alters the RIXS spectra, allowing us to trace these effects directly from the experiment. Multimode vibrational dynamics is accounted for in our simulations by using a hybrid time-dependent stationary approach for the quantum nuclear wave packet simulations, showing the important role it plays in RIXS.

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Держатели документа:
Department of Theoretical Chemistry and Biology, Kth Royal Institute of Technology, Stockholm, SE-106 91, Sweden
International Research Center of Spectroscopy and Quantum Chemistry-IRC Sqc, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Federal Research Center Ksc Sb Ras, Krasnoyarsk, 660036, Russian Federation
Department of Physics and Astronomy, Uppsala University, P.O. Box 516, Uppsala, SE-751 20, Sweden
Max Iv Laboratory, Lund University, P.O. Box 118, Lund, SE-221 00, Sweden
Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
Institute for Methods and Instrumentation in Synchrotron Radiation Research PS-ISRR, Helmholtz-Zentrum Berlin fur Materialien und Energie, Albert-Einstein-Strasse 15, Berlin, 12489, Germany
Institut fur Physik und Astronomie, Universitat Potsdam, Karl-Liebknecht-Strasse 24-25, Potsdam, 14476, Germany
Department of Medicinal Chemistry, Uppsala University, P.O. Box 574, Uppsala, 75123, Sweden
Swiss Light Source, Photon Science Division, Paul Scherrer Institut, Villigen PSI, CH-5232, Switzerland
Department of Physics, Stockholm University, AlbaNova University Center, Stockholm, 10691, Sweden

Доп.точки доступа:
Savchenko, V.; Савченко, Виктория; Ekholm, V.; Brumboiu, I. E.; Norman, P.; Pietzsch, A.; Fohlisch, A.; Rubensson, J. -E.; Grasjo, J.; Bjorneholm, O.; Sathe, C.; Dong, M.; Schmitt, T.; McNally, D.; Lu, X.; Krasnov, P. O.; Краснов, Павел Олегович; Polyutov, S. P.; Полютов, Сергей Петрович; Gel'mukhanov, F.; Гельмуханов, Фарис Хафизович; Odelius, M.; Kimberg, V.; Кимберг, Виктор Валерьевич
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Pyatnov, M. V.
Localized optical modes in a defect-containing liquid-crystal structure adjacent to the metal / M. V. Pyatnov, S. Ya. Vetrov, I. V. Timofeev // J. Opt. Soc. Am. B. - 2017. - Vol. 34, Is. 9. - P. 2011-2017, DOI 10.1364/JOSAB.34.002011. - Cited References: 44. - Russian Foundation for Basic Research (RFBR), Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund (17-42-240464). . - ISSN 0740-3224
Кл.слова (ненормированные):
Cholesteric liquid crystals -- Crystal defects -- Defects -- Liquid crystals -- Liquids -- Metals -- Optical Kerr effect -- Polarization -- Diffraction reflections -- External fields -- Field localization -- Maximum field intensity -- Metallic layers -- Polarization dependence -- Spectral properties -- Transmittance spectra -- Crystal structure
Аннотация: The possibility of the existence of localized optical modes with maximum field intensity at the interface between the metal and cholesteric liquid crystal is theoretically grounded. The system comprises a defect-containing cholesteric liquid crystal and a metal layer. It is established that the localization occurs at almost any defect thickness rather than only at the half-wave thickness, at which the loss of the polarization dependence of diffraction reflection and the absence of field localization are observed for the structure without the metallic layer. It is demonstrated that the spectral properties can be controlled by external fields affecting the liquid crystal. At large thicknesses of the cholesteric liquid crystal between the defect and the metallic layer, the spectrum contains the pronounced peaks corresponding to the edge modes. The results obtained open new opportunities for controlling the transmittance spectrum, polarization, and localization of light in optoelectronic elements based on the investigated system. © 2017 Optical Society of America.

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Держатели документа:
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Laboratory of Nonlinear Optics and Spectroscopy, Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Vetrov, S. Ya.; Ветров, Степан Яковлевич; Timofeev, I. V.; Тимофеев, Иван Владимирович
}
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Electro-optical and dielectric properties of polymer-stabilized blue phase liquid crystal impregnated with a fluorine-containing compound / P. C. Wu [et al.] // J. Mol. Liq. - 2018. - Vol. 267. - P. 138-143, DOI 10.1016/j.molliq.2017.12.062. - Cited References: 47. - The authors are indebted to Prof. Mon-Juan Lee of Chang-Jung Christian University for valuable discussions on photopolymerization. This work was financially supported by the Ministry of Science and Technology, Taiwan, through Grant Nos. 104-2112-M-009-008-MY3 and 106-2923-M-009-002-MY3, and by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research projects 16-42-240704 and 17-42-240464. . - ISSN 0167-7322. - ISSN 1873-3166

РУБ Chemistry, Physical + Physics, Atomic, Molecular & Chemical
Рубрики:
HYSTERESIS
TEMPERATURE
MONOMERS
Кл.слова (ненормированные):
Polymer-stabilized blue phase -- Liquid crystal -- Fluorine-containing -- compound -- Operating voltage -- Ionic effect
Аннотация: The effects of a fluorine-containing compound (4,4′-difluorobenzophenone; DF) on the electro-optical and dielectric properties of polymer-stabilized blue phase (PSBP) liquid crystals were investigated. When a PSBP cell was driven by an in-plane electric field, the addition of DF up to 2.7 wt% effectively reduced the operation voltage by ~ 30%. Further inspection by dielectric spectroscopy indicated that the ionic concentration in PSBP decreased with increasing loading of DF. This finding can be ascribed to the complexation of impurity ions near the ketone group and carbon–fluorine bonds of the DF compound that restrained the ion transport after photopolymerization. As a result, the DF compound can be regarded as a superior ion-suppressor, enabling the reduction in the ionic effect and, in turn, the promotion of the electro-optical response of a PSBP.

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Держатели документа:
Natl Chiao Tung Univ, Coll Photon, Inst Imaging & Biomed Photon, Tainan 71150, Taiwan.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Lab Nonlinear Opt & Spect, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Wu, Po-Chang; Chen, Hsin-Li; Rudakova, Natalya V.; Timofeev, I. V.; Тимофеев, Иван Владимирович; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Lee, Wei; Ministry of Science and Technology, Taiwan [104-2112-M-009-008-MY3, 106-2923-M-009-002-MY3]; Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund [16-42-240704, 17-42-240464]
}
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Inverse mode of ion-surfactant method of director reorientation inside nematic droplets / M. N. Krakhalev, O. O. Prishchepa, V. Y. Zyryanov // Mol. Cryst. Liquid Cryst. - 2009. - Vol. 512, Is. 1. - P. 1998-2003, DOI 10.1080/15421400903050814. - Cited Reference Count: 8. - Гранты: This work was partially supported by the grants Nos. NSh-3818.2008.3; 02.740.11.0220, and No. 08-03-01007 of RFBR, and Nos. 27.1; 110; 144 of SB RAS. M. Krakhalev acknowledges the financial support from K. I. Zamaraev MBN Foundation. O. Prishchepa acknowledges the financial support from Russian Science Support Foundation. - Финансирующая организация: RFBR [NSh-3818.2008.3, 02.740.11.0220, 08-03-01007]; SB RAS [27.1; 110; 144]; Zamaraev MBN Foundation; Russian Science Support Foundation . - ISSN 1542-1406
Кл.слова (ненормированные):
electrically commanded surfaces -- ion surfactant -- nematic -- polymer dispersed liquid crystals -- surface anchoring -- Electrically commanded surfaces -- Ion surfactant -- Nematic -- Polymer dispersed liquid crystals -- Surface anchoring -- Applied voltages -- Crossed polarizers -- Director fields -- Director reorientation -- Droplet structure -- Electrically commanded surfaces -- High concentration -- Homeotropic -- Initial state -- Ionic modification -- Liquid-crystal droplets -- Nematic droplets -- Nematic polymer -- Surface-active cations -- Surface-anchoring -- Trimethyl -- Ammonium compounds -- Cationic surfactants -- Crystals -- Drop formation -- Dyes -- Ionization of liquids -- Ions -- Liquid crystal displays -- Liquid crystals -- Liquids -- Nematic liquid crystals
Аннотация: Inverse mode of a novel electrooptical effect caused by the ionic modification of boundary conditions has been studied for liquid crystal droplets. We have considered the droplets of nematic 5CB doped with cationic surfactant cetyl-trimethyl-ammonium-bromide and dispersed in polyvinyl alcohol. In the initial state the surface anchoring was normal on the whole interface due to the high concentration of homeotropic surfactant. Applied voltage results in the purification of a section of the interface from the surface-active cations thereby restoring here a tangential anchoring and stimulating the significant transformation of droplet structure. At that three different types of director field distribution can be realized within the same droplet. The proper textures of the droplet both in the crossed polarizers and without analyzer are considered.

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Держатели документа:
SB RAS, LV Kirensky Phys Inst, Krasnoyarsk Sci Ctr, Krasnoyarsk, Russia
Siberian Fed Univ, Krasnoyarsk, Russia

Доп.точки доступа:
Krakhalev, M. N.; Крахалев, Михаил Николаевич; Prishchepa, O. O.; Прищепа, Оксана Олеговна; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич
}
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    Electrically tunable thermoresponsive optic switch for smart window application based on dye-doped cholesteric liquid crystal / Y. -C. Chang, S. -H. Yang, V. Y. Zyryanov, W. Lee // J. Mol. Liq. - 2023. - Vol. 388. - Ст. 122752, DOI 10.1016/j.molliq.2023.122752. - Cited References: 24. - This work was financially supported by National Science and Technology Council, Taiwan (NSTC), under Grant Nos. 110-2112-M-A49-023 and 111-2112-M-A49-033 . - ISSN 0167-7322. - ISSN 1873-3166
   Перевод заглавия: Электрически настраиваемый термочувствительный оптический переключатель для применения в «умных окнах» на основе холестерического жидкого кристалла, легированного красителем
Кл.слова (ненормированные):
Black dye -- Liquid-crystal devices -- Texture switching -- Smart window -- Cholesteric liquid crystal -- Optical switch
Аннотация: We demonstrate a cholesteric liquid crystal (CLC) smart window that functions as a reversible thermo-optic switch between a transparent state at a low temperature and a low-transmission state at a higher temperature. This smart window is based on the addition of a thermoresponsive handedness-reversible chiral dopant in a mixture of a typical chiral dopant, a dichroic dye and nematic liquid crystal, yielding a thermosensitized CLC. In such a homeotropically anchored dye-doped CLC, the thickness-to-pitch ratio increases as the temperature rises, causing the device to switch from the homeotropic texture to the fingerprint texture. The absorption characteristic of the dichroic dye enables the homeotropic and fingerprint configurations in the dye-doped CLC to create two distinct transmission levels—the transparent and opaque optically stable states, respectively. Such a switching mechanism entails no additional electric power and, thus, is energy-saving. Moreover, the switching temperature at which the texture transition takes place can be actively increased by increasing voltage for the smart window. This allows the CLC device to be perfectly adaptable to the need of a user and, in turn, applicable to a wider variety of environments.

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Держатели документа:
Institute of Lighting and Energy Photonics, National Yang Ming Chiao Tung University, Guiren Dist, Tainan, 711010, Taiwan
Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Scientific Center, ” Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Institute of Imaging and Biomedical Photonics, College of Photonics, National Yang Ming Chiao Tung University, Guiren Dist, Tainan, 711010, Taiwan

Доп.точки доступа:
Chang, Y.-C.; Yang, S.-H.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Lee, W.
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Fabrication and magnetic properties of ni nanospheres encapsulated in a fullerene-like carbon / S. V. Pol [et al.] // Journal of Physical Chemistry B: Biophysical Chemistry, Biomaterials, Liquids, and Soft Matter. - 2005. - Т. 109, № 19. - P. 9495-9498, DOI 10.1021/jp050692j. - Библиогр.: 27 . - ISSN 1520-6106

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Держатели документа:
Department of Chemistry,Center for Advanced Materials and Nanotechnology,Bar-Ilan University
Department of Physics,Bar-Ilan University
L.V. Kirensky Institute of Physics,SB RAS

Доп.точки доступа:
Pol, S. V.; Pol, V. G.; Gedanken, A.; Frydman, A.; Churilov, G. N. ; Чурилов Григорий Николаевич
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    Rheological properties of colloidal suspensions of alumina nanofibers / A. V. Minakov, M. I. Pryazhnikov, M. M. Simunin [et al.] // J. Mol. Liq. - 2022. - Vol. 367. - Ст. 120385, DOI 10.1016/j.molliq.2022.120385. - Cited References: 62. - This work is partially financed by Ministry of Science and Higher Education of the Russian Federation (project no. FSRZ-2020-0012) . - ISSN 0167-7322
   Перевод заглавия: Реологические свойства коллоидных суспензий нановолокон оксида алюминия
Кл.слова (ненормированные):
Alumina nanofibers -- Rheological properties -- Shear viscosity -- Bulk viscosity -- Colloidal stability
Аннотация: We have studied the rheological properties of colloidal suspensions based alumina nanofibers (ANF) with a mass fraction of 0.125–2 wt%. The ANFs used in this work are stand out by a high aspect ratio L/D ∼ 106–107 (dry ANF before dispersion) and ease of dispersion due to the self-organized aligned structure of ANF, which is characteristic of our synthesis method. It was shown that ANF suspensions are characterized by high colloidal stability, zeta potential has a significant dependence on ANF volume fraction. ANF have a strong effect on the shear viscosity of colloidal suspensions; non-Newtonian behavior is observed in suspensions with an ANF mass fraction of 0.5 wt%. A comprehensive study of the propagation of ultrasound in ANF suspensions was carried out. Based on experimental results on the scattering of ultrasound in suspensions and theoretical calculations, data on the bulk viscosity of ANF suspensions were obtained for the first time. The results of the study allow us to judge the possibility of using ANF as a promising fibrous additive to optimize the rheological properties of suspensions for various technical purposes, which include drilling muds, paint and varnish compositions, concrete-cement mixtures.

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Держатели документа:
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Kutateladze Institute of Thermophysics, SB RAS, Novosibirsk, 630090, Russian Federation
Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences (KSC SB RAS), Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State University of Science and Technology (Reshetnev University), Krasnoyarsk, 660037, Russian Federation
Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
L.V. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Bauman Moscow State Technical University, Moscow, 105005, Russian Federation

Доп.точки доступа:
Minakov, A. V.; Pryazhnikov, M. I.; Simunin, M. M.; Dobrosmyslov, S. S.; Kuular, A. A.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Volochaev, M. N.; Волочаев, Михаил Николаевич; Khartov, S. V.; Voronin, A. S.
}
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Electrically induced transformation of cholesteric droplets under homeotropic boundary conditions / M. N. Krakhalev, A. P. Gardymova, V. Yu. Rudyak [et al.] // J. Mol. Liq. - 2023. - Vol. 385. - Ст. 122379, DOI 10.1016/j.molliq.2023.122379. - Cited References: 37. - This research was funded by Russian Science Foundation, Grant No. 20-72-10038. The research was carried out using the equipment of the shared research facilities of HPC computing resources at Lomonosov Moscow State University . - ISSN 0167-7322. - ISSN 1873-3166
Кл.слова (ненормированные):
Cholesteric droplet -- Orientational structure -- Topological defect -- Electric field -- Structure relaxation
Аннотация: Cholesteric droplets under homeotropic boundary conditions demonstrate a rich variety of possible orientational structures. We have implemented electrically controlled switching of such droplets between two classes of stable states: i) structures with cylindrical cholesteric layers and ii) layer-like structures with one or more λ+1/2-disclinations. Structure relaxation after switching off the voltage proceeded via the fast (less than 1 s), the slow (more than 1 s), and the stabilization stages (~10 hours). We investigated intermediate long-lived metastable states occurring in the relaxation process and explained the formation of various structures in cholesteric droplets. The fast and the slow stages of relaxation were found to be sensitive to the voltage reduction regime. We have determined the combinations of droplet size and voltage reduction regimes leading to the two types of structures after relaxation.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 50/38 Akademgorodok, Krasnoyarsk, 330036, Krasnoyarsk region, Russia
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, 79 Svobodny Pr., Krasnoyarsk, 660041, Krasnoyarsk region, Russia
Faculty of Physics, Moscow State University, 1/2 Leninskiye Gory, Moscow, 119991, Moscow, Russia
P.N. Lebedev Physical Institute of the Russian Academy of Sciences, 53 Leninsky Pr., Moscow, 119991, Moscow, Russia

Доп.точки доступа:
Krakhalev, M. N.; Крахалев, Михаил Николаевич; Gardymova, A. P.; Гардымова, Анна Петровна; Rudyak, Vladimir Yu.; Barbashov, Vadim A.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич
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10.

Nonanalytic Spin Susceptibility of a Fermi Liquid: The Case of Fe-Based Pnictides / M. M. Korshunov [et al.] // Phys. Rev. Lett. - 2009. - Vol. 102, Is. 23. - Ст. 236403, DOI 10.1103/PhysRevLett.102.236403. - Cited References: 41. - We thank R. Klingeler for useful discussions. M. M. K. acknowledges support from RFBR ( 09-02-00127) and the OFN RAS program on "Strong electronic correlations". I. E. acknowledges partial support from APCTP, NSF-DMR ( 0645461), and the RMHE Program ( Contract No. 2.1.1/3199). D. L. M. acknowledges support from Laboratoire de Physique des Solides, Universite Paris-Sud ( France) and RTRA Triangle de la Physique. A. V. C. acknowledges support from NSF-DMR 0604406. . - ISSN 0031-9007

РУБ Physics, Multidisciplinary
Рубрики:
PHASE-TRANSITIONS
QUANTUM
Кл.слова (ненормированные):
Electron pockets -- Fermi energy -- Linear temperature dependence -- Pnictides -- Prefactor -- Quantitative agreement -- Spin susceptibility -- Temperature dependence -- Fermi liquids -- Fermions -- Liquids -- Magnetic susceptibility -- Temperature distribution -- Spin dynamics
Аннотация: We propose an explanation of the peculiar linear temperature dependence of the uniform spin susceptibility chi(T) in ferropnictides. We argue that the linear in T term appears to be due to the nonanalytic temperature dependence of chi(T) in a two-dimensional Fermi liquid. We show that the prefactor of the T term is expressed via the square of the spin-density-wave (SDW) amplitude connecting nested hole and electron pockets. Because of an incipient SDW instability, this amplitude is large, which, along with a small value of the Fermi energy, makes the T dependence of chi(T) strong. We demonstrate that this mechanism is in quantitative agreement with the experiment.

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[Korshunov, M. M.
Eremin, I.] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
[Korshunov, M. M.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Eremin, I.] Tech Univ Carolo Wilhelmina Braunschweig, Inst Math & Theoret Phys, D-38106 Braunschweig, Germany
[Efremov, D. V.] Tech Univ Dresden, Inst Theoret Phys, D-01062 Dresden, Germany
[Maslov, D. L.] Univ Florida, Dept Phys, Gainesville, FL 32611 USA
[Chubukov, A. V.] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA
ИФ СО РАН
Max-Planck-Institut fur Physik Komplexer Systeme, D-01187 Dresden, Germany
L. V. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036 Krasnoyarsk, Russian Federation
Institute fur Mathematische und Theoretische Physik, Technische Universitat Braunschweig, 38106 Braunschweig, Germany
Institut fur Theoretische Physik, Technische Universitat Dresden, 01062 Dresden, Germany
Department of Physics, University of Florida, Gainesville, FL 32611, United States
Department of Physics, University of Wisconsin-Madison, Madison, WI 53706, United States
Kazan State University, 420087 Kazan, Russian Federation

Доп.точки доступа:
Korshunov, M. M.; Коршунов, Максим Михайлович; Eremin, I.; Efremov, D. V.; Maslov, D. L.; Chubukov, A. V.; RFBR [09-02-00127]; OFN RAS; APCTP; NSF-DMR [0645461, 0604406]; RMHE [2.1.1/3199]; Laboratoire de Physique des Solides, Universite Paris-Sud (France); RTRA Triangle de la Physique
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