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    A novel red-emitting La2CaHfO6:Mn4+ phosphor based on double perovskite structure for pc-WLEDs lighting / G. C. Xing [et al.] // CrystEngComm. - 2019. - Vol. 21, Is. 23. - P. 3605-3612, DOI 10.1039/c9ce00556k. - Cited References: 47. - This work is financially supported by the National Natural Science Foundation of China (NSFC No. 51672259). . - ISSN 1466-8033
   Перевод заглавия: Новый красный люминофор La2CaHfO6: Mn4+ на основе структуры двойного перовскита для светодиодных ламп pc-WLED

РУБ Chemistry, Multidisciplinary + Crystallography
Рубрики:
LUMINESCENCE PROPERTIES
   ELECTRONIC-STRUCTURE
   OPTICAL-PROPERTIES
   SITE
Аннотация: Non-rare earth doped oxides with red emission are one of the current research hotspots for achieving the warm white light range in the phosphor converted white light emitting diodes (pc-WLEDs) field. In the current work, a novel Mn4+-activated La2CaHfO6 red phosphor is reported for the first time and its crystal structure is analyzed by Rietveld refinement. The photoluminescent properties of La2CaHfO6:Mn4+ are investigated in detail with the help of diffuse refletance spectroscopy, photoluminescence spectroscopy, and temperature-dependent PL spectroscopy. Based on the diffuse refletance spectra, the calculated optical band gap for La2CaHfO6 is 4.9 eV, indicating that La2CaHfO6 could be a suitable host for activators' doping. Under 380 nm near-ultraviolet (n-UV) light excitation, the as-prepared La2CaHfO6:Mn4+ displays intense red emission centered at 693 nm. Through an accurate calculation of Dq/B (2.47) and nephelauxetic effect β1 (0.949), the origination of strong crystal field (CF) and deep-red emission is demonstrated. By combining the representative La2CaHfO6:0.002Mn4+, blue BAM:Eu2+, and green (Ba,Sr)2SiO4:Eu2+ phosphors with a 380 nm UV chip to fabricate the pc-WLEDs device, a white light is obtained with low correlated color temperature (CCT = 5165 K) and high color rendering index (Ra = 87.8), demonstrating that the as-prepared La2CaHfO6:Mn4+ phosphors can be used as red-emitting candidate in pc-WLEDs lighting.

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Держатели документа:
China Univ Geosci, Fac Mat Sci & Chem, Minist Educ, Engn Res Ctr Nanogeomat, 388 Lumo Rd, Wuhan 430074, Hubei, Peoples R China.
FRC KSC SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Xing, Gongcheng; Feng, Yuxin; Gao, Zhiyu; Tao, Mengxuan; Wang, Hongquan; Wei, Y.i.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Li, Guogang
}
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Ab initio and empirical modeling of lithium atoms penetration into silicon / N. S. Mikhaleva [et al.] // Comput. Mater. Sci. - 2015. - Vol. 109. - P. 76-83, DOI 10.1016/j.commatsci.2015.06.024. - Cited References: 69. - The authors would like to thank the Institute of Computational Modeling SB RAS, Krasnoyarsk, Information Technology Centre Novosibirsk State University, for providing access to their computational resources. The reported study was supported by RFBR, research project No. 14-02-31071, 14-02-31309, 12-02-00640, by the Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools (project No. NSh-2886.2014.2), Increase Competitiveness Program of NUST "MISiS" (No. K2-2015-033). The authors also would like to thank Prof. Stephan Irle and L.R. Moskvina for fruitful discussions and helpful ideas. . - ISSN 0927-0256

РУБ Materials Science, Multidisciplinary
Рубрики:
LONG CYCLE LIFE
   CORE-LEVEL SPECTROSCOPY
   CARBON-COATED SILICON
   AUGMENTED-WAVE METHOD
   ION BATTERIES
   MOLECULAR-DYNAMICS
   INTERATOMIC POTENTIALS
   ELECTRONIC-STRUCTURE
   CRYSTALLINE SILICON
   SI(100)2X1 SURFACE
Кл.слова (ненормированные):
Li-ion batteries -- Silicon -- Surface diffusion -- Li diffusion -- Density functional theory -- Molecular dynamics
Аннотация: A process of lithium atoms penetration into silicon (1 0 0) subsurface layers was investigated with the help of DFT method. It was shown that, while the concentration of lithium adatoms on reconstructed (1 0 0) silicon surface is low, the bonding energy of lithium atoms in the subsurface layers is smaller than the bonding energy on the surface, so lithium atoms are unlikely to migrate into the crystal. When the (1 0 0) silicon surface is covered by 2 layers of lithium, migration into the subsurface layer becomes favorable. In addition to this, the reconstruction of the surface changes to the form with symmetric dimers as the concentration increases. Thus, all possible lithium migration paths become energy-wise equal, so the rate of lithium atom transfer into silicon crystal rises. In addition to the ab initio calculations, an ad-hoc empirical interatomic potential was developed and the kinetics of lithium diffusion into silicon were studied. It was shown that lithium penetration proceeds in a layer-by-layer way with a sharp border between undoped and lithiated silicon. This is accounted for the fact that, once a tetrahedral interstice is occupied by a lithium atom, the migration barriers between the adjacent interstices become lower and the rate of diffusion increases. © 2015 Elsevier B.V. All rights reserved.

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Держатели документа:
L.V. Kirensky Institute of Physics SB RAS, 50 bld. 38 Akademgorodok, Krasnoyarsk, Russian Federation
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, Russian Federation
National University of Science and Technology MISiS, 4 Leninskiy pr., Moscow, Russian Federation

Доп.точки доступа:
Mikhaleva, N. S.; Михалева, Наталья Сергеевна; Visotin, M. A.; Popov, Z. I.; Попов, Захар Иванович; Kuzubov, A. A.; Кузубов, Александр Александрович; Fedorov, A. S.; Федоров, Александр Семенович
}
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Action of the atomic and electronic structure of pheromone molecules on the effectiveness of communication in xylophagous insects / P. V. Artyushenko [et al.] // J. Struct. Chem. - 2016. - Vol. 57, Is. 2. - P. 287-293, DOI 10.1134/S0022476616020074. - Cited References:27. - This work was supported by RFBR projects Nos. 13-04-00375 and16-04-00132. . - ISSN 0022-4766. - ISSN 1573-8779

РУБ Chemistry, Inorganic & Nuclear + Chemistry, Physical
Рубрики:
Monochamus-galloprovincialis coleoptera
   Density-functional theories
   Beetle Ips-typographus
   Pine sawyer beetle
   Aggregation pheromone
   Cerambycidae
   Attraction
   Components
   Attack
   Set
Кл.слова (ненормированные):
atomic and electronic structure -- functional density methods -- absorption -- spectra -- excited states -- xylophages -- pheromones
Аннотация: The B3LYD /6-31(p,d) density functional method is applied to pheromones of the forest xylophagous insects Ips typographus L., Monochamus urussovi Fisch., and Monochamus galloprovincialis Oliv. to calculate the absorption spectra and find excited states. The calculated results are used to assess the possible activity of the molecules when they are affected by solar radiation.

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Публикация на русском языке Влияние атомной и электронной структуры молекул феромонов на эффективность коммуникации насекомых-ксилофагов [Текст] / П. В. Артюшенко [и др.] // Журн. структ. химии. - 2016. - Т. 57 № 2. - С. 304-310

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.
Russian Acad Sci, Siberian Branch, KSC Presidium, Int Res Ctr Studies Extreme States Organism, Krasnoyarsk, Russia.
Russian Acad Sci, Siberian Branch, Sukachev Inst Forest, Krasnoyarsk, Russia.

Доп.точки доступа:
Artyushenko, P. V.; Артюшенко, Полина Владимировна; Tomilin, F. N.; Томилин, Феликс Николаевич; Kuzubov, A. A.; Кузубов, Александр Александрович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Tsikalova, P. E.; Ovchinnikova, T. M.; Soukhovolsky, V. G.; RFBR [13-04-00375, 16-04-00132]
}
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Amitin, L. N.
Comparison of the electronic-structure of CSPbCl3, PBCL2, and CSCaCl3 on the basis of optical spectroscopy data / L. N. Amitin, A. T. Anistratov, A. I. Kuznetsov // Phys. Status Solidi B. - 1980. - Vol. 101, Is. 1. - P. K65-K73, DOI 10.1002/pssb.2221010160. - Cited References: 10 . - ISSN 0370-1972

РУБ Physics, Condensed Matter

WOS
Держатели документа:
ACAD SCI USSR,INST PHYS,KRASNOYARSK,USSR
ИФ СО РАН
Доп.точки доступа:
Anistratov, A. T.; Анистратов, Анатолий Тихонович; Kuznetsov, A. I.
}
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An analysis of the mechanism of Kerr effect enhancement in Mn/Dy/Bi / S. G. Ovchinnikov [et al.] // Phys. Solid State. - 1999. - Vol. 41, Is. 1. - P. 80-86, DOI 10.1134/1.1130733. - Cited References: 35 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
ELECTRONIC-STRUCTURE
   THIN-FILMS
   MAGNETIC-PROPERTIES
   RARE-EARTH
   MAGNETOOPTICAL PROPERTIES
   MNBI FILMS
   STABILITY
   GD
Аннотация: A study is reported of the structural, magnetic, and magneto-optic properties of Mn/Dy/Bi films obtained by multilayer technology. The maximum Kerr rotation angle in such films is shown to be theta(k) = 2.25 degrees. Possible reasons for such a large Kerr effect enhancement are considered, namely, an increase in the 6p - 3d transition probability caused by symmetry distortion, polarization of the Bi6p band, and a change in the density of states near the Fermi level. The latter reason has been analyzed by simulating the electronic structure of Mn/Dy/Bi through superposition of Dy levels on the MnBi band structure. This approach has revealed possible additional transitions which may be induced by the presence of a Dy buffer and could contribute to the Kerr magneto-optic effect. (C) 1999 American Institute of Physics. [S1063=7834(99)02001-8].

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Публикация на русском языке Анализ механизма увеличения эффекта Керра в Mn/Dy/Bi [Текст] / С. Г. Овчинников [и др.] // Физ. тверд. тела. - С.-Петербург, 1999. - Т. 41 Вып. 1. - С. 91-97

Держатели документа:
Russian Acad Sci, LV Kirenskii Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Burkova, L. V.; Буркова, Людмила Викторовна; Seredkin, V. A.; Середкин, Виталий Александрович; Yakovchuk, V. Y.
}
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Anisotropic quasiparticle lifetimes in Fe-based superconductors / A. F. Kemper [et al.] // Phys. Rev. B. - 2011. - Vol. 83, Is. 18. - Ст. 184516, DOI 10.1103/PhysRevB.83.184516. - Cited References: 43. - We thank O. Dolgov, R. Hackl, D. Maslov, I. Mazin, B. Muschler, V. Mishra, and J. Schmalian for useful discussions. A. F. K. and T. P. D. thank the Walther MeiBner Institut for their hospitality. A. F. K., M. M. K., and P. J. H. acknowledge support from DOE Grant No. DE-FG02-05ER46236. M. M. K. acknowledges support from RFBR (Grant No. 09-02-00127), Presidium of RAS program "Quantum physics of condensed matter" N5.7, FCP Scientific and Research-and-Educational Personnel of Innovative Russia for 2009-2013 (GK P891), and President of Russia (Grant No. MK-1683.2010.2). A. F. K. and T. P. D. acknowledge support from DOE Grant No. DE-AC02-76SF00515. H.-P. C. and J.N.F. acknowledge DOE/BES Grant No. DE-FG02-02ER45995. . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
ELECTRONIC RAMAN-SCATTERING
Аннотация: We study the dynamical quasiparticle scattering by spin and charge fluctuations in Fe-based pnictides within a five-orbital model with on-site interactions. The leading contribution to the scattering rate is calculated from the second-order diagrams with the polarization operator calculated in the random-phase approximation. We find one-particle scattering rates which are highly anisotropic on each Fermi surface sheet due to the momentum dependence of the spin susceptibility and the multiorbital composition of each Fermi pocket. This fact, combined with the anisotropy of the effective mass, produces disparity between electrons and holes in conductivity, the Hall coefficient, and the Raman initial slope, in qualitative agreement with experimental data.

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Держатели документа:
[Kemper, A. F.
Devereaux, T. P.
Hirschfeld, P. J.] Stanford Inst Mat & Energy Sci, SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA
[Kemper, A. F.
Devereaux, T. P.
Hirschfeld, P. J.] Stanford Univ, Geballe Lab Adv Mat, Stanford, CA 94305 USA
[Kemper, A. F.
Korshunov, M. M.
Fry, J. N.
Cheng, H-P.
Hirschfeld, P. J.] Univ Florida, Dept Phys, Gainesville, FL 32611 USA
[Korshunov, M. M.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Stanford Institute for Materials and Energy Science, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, United States
Geballe Laboratory for Advanced Materials, Stanford University, Stanford, CA 94305, United States
Department of Physics, University of Florida, Gainesville, FL 32611, United States
L.V. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036 Krasnoyarsk, Russian Federation

Доп.точки доступа:
Kemper, A. F.; Korshunov, M. M.; Коршунов, Максим Михайлович; Devereaux, T. P.; Fry, J. N.; Cheng, H. P.; Hirschfeld, P. J.
}
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    Anisotropic thermal expansion and electronic structure of LiInSe2 / V. V. Atuchin, L. I. Isaenko, S. I. Lobanov [et al.] // Molecules. - 2022. - Vol. 27, Is. 16. - Ст. 5078, DOI 10.3390/molecules27165078. - Cited References: 65. - This work was partly supported by the Ministry of Education and Science of the Russian Federation (grant FSUS-2020-0036), state assignment of IGM SB RAS (preliminary crystal charge composition analysis), Russian Science Foundation (grants #19-12-00085-P, crystal growth, and 21-19-00046, conceptualization), National Scientific Foundations of China (Grants 51702330, 11974360 and 51872297), the Young Elite Scientist Sponsorship Program by CAST (YESS), and the CAS Project for Young Scientists in Basic Research (Grants YSBR-024) and the Government of the Russian Federation (075-15-2022-1132). The XPS measurements were carried out at the Surface Analysis Laboratory of the University of New South Wales, Sydney, Australia . - ISSN 1420-3049
   Перевод заглавия: Тепловое расширение и электронная структура LiInSe2
Кл.слова (ненормированные):
LiInSe2 -- crystal growth -- thermal expansion -- band structure -- XPS -- DFT
Аннотация: Optical quality cm-sized LiInSe2 crystals were grown using the Bridgman–Stockbarger method, starting from pure element reagents, under the conditions of a low temperature gradient of 5–6 degrees/cm and a slight melt overheating. The phase purity of the grown crystal was verified by the powder XRD analysis. The thermophysical characteristics of LiInSe2 were determined by the XRD measurements in the temperature range of 303–703 K and strong anisotropy of the thermal expansion coefficients was established. The following values of thermal expansion coefficients were determined in LiInSe2: αa = 8.1 (1), αb = 16.1 (2) and αc = 5.64 (6) MK−1. The electronic structure of LiInSe2 was measured by X-ray photoelectron spectroscopy. The band structure of LiInSe2 was calculated by ab initio methods.

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Держатели документа:
Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk, 630090, Russian Federation
Department of Applied Physics, Novosibirsk State University, Novosibirsk, 630090, Russian Federation
Research and Development Department, Kemerovo State University, Kemerovo, 650000, Russian Federation
Department of Industrial Machinery Design, Novosibirsk State Technical University, Novosibirsk, 630073, Russian Federation
R&D Center "Advanced Electronic Technologies", Tomsk State University, Tomsk, 634034, Russian Federation
Laboratory of Crystal Growth, Sobolev Institute of Geology and Mineralogy, SB RAS, Novosibirsk, 630090, Russian Federation
Laboratory of Functional Materials, Novosibirsk State University, Novosibirsk, 630090, Russian Federation
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Engineering Physics and Radioelectronic, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Department of Physics, Far Eastern State Transport UniversityKhabarovsk 680021, Russian Federation
Australian Science and Technology Organisation (ANSTO), Lucas Heights, Australia
Functional Crystals Laboratory, Technical Institute of Physics and Chemistry, Chinese Academy of SciencesBeijing 100190, China
University of the Chinese Academy of SciencesBeijing 100049, China

Доп.точки доступа:
Atuchin, V. V.; Isaenko, L. I.; Lobanov, S. I.; Goloshumova, A. A.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zhang, Z.; Zhang, X.; Jiang, X.; Lin, Z.
}
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Anisotropic thermal expansion and electronic transitions in the Co3BO5 ludwigite / N. Kazak, A. Arauzo, J. Bartolome [et al.] // Dalton Trans. - 2022. - Vol. 51, Is. 16. - P6345-6357, DOI 10.1039/d2dt00270a. - Cited References: 57. - We are grateful to the Russian Foundation for Basic Research (project no. 20-02-00559 and 21-52-12033) for supporting this paper. This work was performed within the framework of the budget project no. 0287-2021-0013 for the Institute of Chemistry and Chemical Technology SB RAS. We acknowledge the financial support from the Spanish Ministry of Economy, Industry and Competitiviness (MINECO), (Grant No. MAT2017-83468-R) and from the regional Government of Aragón (E12-20R RASMIA project) . - ISSN 1477-9226
Кл.слова (ненормированные):
Activation energy -- Anisotropy -- Cobalt compounds -- Crystal structure -- Electric conductivity -- Electronic properties -- Magnetic moments -- Magnetic susceptibility -- Negative thermal expansion
Аннотация: The investigations of the crystal structure, magnetic and electronic properties of Co3BO5 at high temperatures were carried out using powder X-ray diffraction, magnetic susceptibility, electrical resistivity, and thermopower measurements. The orthorhombic symmetry (Sp.gr. Pbam) was observed at 300 K and no evidence of structural phase transitions was found up to 1000 K. The compound shows a strong anisotropy of the thermal expansion. A large negative thermal expansion along the a-axis is observed over a wide temperature range (T = 300–600 K) with αa = −35 M K−1 at T = 500 K with simultaneous expansion along the b- and c-axes with αb = 70 M K−1 and αc = 110 M K−1, respectively. The mechanisms of thermal expansion are explored by structural analysis. The activation energy of the conductivity decreases significantly above 700 K. Electronic transport was found to be a dominant conduction mechanism in the entire temperature range. The correlations between the thermal expansion, electrical resistivity, and effective magnetic moment were revealed and attributed to the evolution of the spin state of Co3+ ions towards the spin crossover and gradual charge-ordering transition.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Instituto de Nanociencia y Materiales de Aragon (INMA), CSIC-Universidad de Zaragoza and Departamento de Fisica de la Materia Condensada, Zaragoza, 50009, Spain
Servicio de Medidas Fisicas, Universidad de Zaragoza, Zaragoza, 50009, Spain
Research and Development Department, Kemerovo State University, Kemerovo, 650000, Russian Federation
Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Kazak, N. V.; Казак, Наталья Валерьевна; Arauzo, A.; Bartolome, J.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Solovyov, L.; Borus, A.; Борус, Андрей Андреевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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Anomalies of the electronic structure and physical properties of rare-earth cobaltites near spin crossover / V. A. Dudnikov [et al.] // JETP Letters. - 2016. - Vol. 104, Is. 8. - P. 588-600, DOI 10.1134/S002136401620011X. - Cited References: 101. - We are grateful to our colleagues A. Anshits, N. Perov, L. Solov’ev, S. Vereshchagin, S. Gavrilkin, V. Voronov, K. Shaikhutdinov, A. Rogalev, and M.V. Gorev for the fruitful collaboration in the studies of cobaltites for many years. This work was supported by the Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools (project nos. NSh-7559.2016.2, SP-1844.2016.1, and SP-938.2015.5), by the Foundation for Support of Innovations (program UMNIK), by the Russian Foundation for Basic Research (project nos. 16-02-00507, 16-02-00098, 16-32-60049-mol-a-dk, and 16-32-00206_mol-a), and jointly by the Russian Foundation for Basic Research and the Krasnoyarsk Territorial Science Foundation (project nos. 16-42-240413, 16-43-240505, and 16-42-240470). . - ISSN 0021-3640
Аннотация: The features of the characteristics of LnCoO3 cobaltites, where Ln is a rare-earth element, are discussed. Both experiment and theory demonstrate that their essentials are related to the low-spin ground state of cobalt ions. The thermally induced occupation of the excited high-spin state gives rise to peaks in the magnetic susceptibility, specific heat, and thermal expansion, as well as to a smooth insulator–metal transition. The analysis is based both on the data from the current literature concerning LaCoO3 and in many aspects on our own studies of GdCoO3 and La1?xGdxCoO3 solid solutions. © 2016, Pleiades Publishing, Inc.

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Публикация на русском языке Аномалии электронной структуры и физических свойств редкоземельных кобальтитов в окрестности спинового кроссовера [Текст] / В. А. Дудников [и др.] // Письма в Журн. эксперим. и теор. физ. : Наука, 2016. - Т. 104 Вып. 7-8. - С. 604-616

Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Orlov, Yu. S.; Орлов, Юрий Сергеевич; Kazak, N. V.; Казак, Наталья Валерьевна; Platunov, M. S.; Платунов, Михаил Сергеевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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10.

Anomalous in-plane electronic scattering in charge ordered Na 0.41CoO 2•0.6H 2O / G. X. Cao [et al.] // Phys. Rev. Lett. - 2012. - Vol. 108, Is. 23. - Ст. 236401, DOI 10.1103/PhysRevLett.108.236401. - Cited References: 41. - We thank H. Habermeier, D. Mandrus, B. C. Sales, I. Eremin, I. I. Mazin, and P. J. Hirschfeld for useful discussions. G. Cao acknowledges support from NSFC (No. 10804068, 10774097). M. M. K. acknowledges support from RFBR (Grant No. 09-02-00127), Presisium of RAS program "Quantum physics of condensed matter" N5.7, Integration Grant of SBRAS-UrBRAS N40, and Russian FCP (GK 16.740.12.0731), and The Dynasty Foundation and ICFPM. Work at ORNL was supported by the Department of Energy, BES, Materials Science and Engineering Division. . - ISSN 0031-9007

РУБ Physics, Multidisciplinary
Рубрики:
SUPERCONDUCTIVITY
   TRIPLET
   FLUCTUATIONS
   IONS
Аннотация: We report electronic transport measurements on high quality floating zone grown NaxCoO2 and Na0.41CoO2·0.6H2O single crystals. We find an in-plane electronic scattering minimum near 11 K and a clear charge ordering at approximately 50 K. The electronic and magnetic properties in hydrated and nonhydrated Na0.41CoO2 samples are similar at higher temperature, but evolve in markedly different ways below ∼50 K, where a strong ferromagnetic tendency is observed in the hydrated sample. Model calculations show the relationship of this tendency to the structure of the Fermi surface. The results, particularly the clear differences between the hydrated and nonhydrated material show a substantially enhanced ferromagnetic tendency upon hydration. Implications for superconductivity are discussed.

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Держатели документа:
[Cao, Guixin
Gao, Yuze
Le Tacon, Mathieu
Lin, Chengtian] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany
[Cao, Guixin] Shanghai Univ, Dept Phys, Shanghai 200444, Peoples R China
[Cao, Guixin] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA
[Korshunov, Maxim M.] Univ Florida, Dept Phys, Gainesville, FL 32611 USA
[Korshunov, Maxim M.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Korshunov, Maxim M.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Singh, David J.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

Доп.точки доступа:
Cao, G. X.; Korshunov, M. M.; Коршунов, Максим Михайлович; Gao, Y. Z.; Le Tacon, M.; Singh, D. J.; Lin, C. T.
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