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Light-induced ultrafast quantum relaxation dynamics of magnetically ordered spin crossover systems / Yu. S. Orlov, S. V. Nikolaev, S. G. Ovchinnikov // VIII Euro-Asian symposium "Trends in magnetism" (EASTMAG-2022) : Book of abstracts / program com. S. G. Ovchinnikov [et al.]. - 2022. - Vol. 2, Sect. H : Magnetism of strongly correlated electron systems. - Ст. H.P16. - P. 106. - Cited References: 1. - The study was supported by the Russian Scientiʅc Foundation, the Krasnoyarsk Regional Fund of Science, grant No. 22-22-20007 . - ISBN 978-5-94469-051-7

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Siberian Federal University, Krasnoyarsk, Russia

Доп.точки доступа:
Orlov, Yu. S.; Орлов, Юрий Сергеевич; Nikolaev, S. V.; Николаев, Сергей Викторович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Российская академия наук; Физико-технический институт им. Е.К. Завойского ФИЦ Казанского научного центра РАН; Казанский (Приволжский) федеральный университет; Euro-Asian Symposium "Trends in MAGnetism"(8 ; 2022 ; Aug. ; 22-26 ; Kazan); "Trends in MAGnetism", Euro-Asian Symposium(8 ; 2022 ; Aug. ; 22-26 ; Kazan)
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High-resolution x-ray spectra of carbon monoxide reveal ultrafast dynamics induced by long UV pulse / J. C. Liu, V. Savchenko, V. Kimberg [et al.] // New J. Phys. - 2021. - Vol. 23, Is. 6. - Ст. 063030, DOI 10.1088/1367-2630/ac0198. - Cited References: 47. - The reported study was funded by RFBR, project number 19-29-12015. J-CL thanks the support by the National Science Foundation of China under Grant Nos. 11974108, 11574082, and the Fundamental Research Funds for the Central Universities (No. 2021MS046). MO acknowledges funding from the European Union's Horizon 2020 research and innovation programme under the Marie Skodowska-Curie Grant Agreement No. 860553 and the Carl Tryggers Foundation (contract CTS18:285). FG acknowledges also the support from the Helmholtz Virtual Institute VI419 'Dynamic Pathways in Multidimensional Landscapes'. VK acknowledges the Swedish Research Council (VR 2019-03470). The calculations were partially 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 1367-2630

РУБ Physics, Multidisciplinary
Рубрики:
VIBRATIONAL STRUCTURE
   SCATTERING
   RAMAN
   CO
   COLLAPSE
   PROBE
Кл.слова (ненормированные):
UV pump-x-ray probe -- molecular spectroscopy -- ultrafast dynamics -- potential energy surfaces -- x-ray absorption
Аннотация: In theoretical simulations of a UV + x-ray pump-probe (UVX-PP) setup, we show that frequency detuning of the pump UV pulse acts as a camera shutter by regulating the duration of the UVX-PP process. This two-photon absorption with long overlapping UV and x-ray pulses, allowing for high spectral resolution, thereby provides information about ultrafast dynamics of the nuclear wave packet without the requirement of ultrashort pulses and controlled delay times. In a case study of carbon monoxide, the calculated UVX-PP spectra of the O1s−12π1 and C1s−12π1 core-excited states show different vibrational profiles. The interference of intermediate vibrational states reveals details of nuclear dynamics in the UVX-PP process related to a variable duration time controlled by the UV detuning. Both O1s−12π1 and C1s−12π1 pump-probe channels display a splitting of the spectral profile, which however is associated with different physical mechanisms. At the O1s−12π1 resonance, the observed dispersive and non-dispersive spectral bands intersect and result in destructive interference.

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Держатели документа:
North China Elect Power Univ, Dept Math & Phys, Beijing 102206, Peoples R China.
KTH Royal Inst Technol, Dept Theoret Chem & Biol, S-10691 Stockholm, Sweden.
Siberian Fed Univ, Int Res Ctr Spect & Quantum Chem IRC SQC, Krasnoyarsk 660041, Russia.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Helmholtz Zentrum Berlin Mat & Energie, Inst Methods & Instrumentat Synchrotron Radiat Re, Albert Einstein Str 15, D-12489 Berlin, Germany.
Stockholm Univ, AlbaNova Univ Ctr, Dept Phys, SE-10691 Stockholm, Sweden.

Доп.точки доступа:
Liu, Ji-Cai; Savchenko, Viktoriia; Kimberg, V.; Кимберг, Виктор Валерьевич; Gel'mukhanov, F.; Гельмуханов, Фарис Хафизович; Odelius, Michael; RFBRRussian Foundation for Basic Research (RFBR) [19-29-12015]; National Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [11974108, 11574082]; Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities [2021MS046]; European UnionEuropean Commission [860553]; Carl Tryggers Foundation [CTS18:285]; Helmholtz Virtual Institute [VI419]; Swedish Research CouncilSwedish Research CouncilEuropean Commission [VR 2019-03470, 2018-05973]
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Light-induced ultrafast dynamics of spin crossovers under high pressure / Y. S. Orlov, S. V. Nikolaev, A. I. Nesterov, S. G. Ovchinnikov // J. Exp. Theor. Phys. - 2021. - Vol. 132, Is. 3. - P. 399-415, DOI 10.1134/S1063776121030079. - Cited References: 71. - The authors thank the Russian Scientific Foundation for the financial support under the grant 18-12-00022 . - ISSN 1063-7761
Кл.слова (ненормированные):
Crossover pressure -- High-spin ground state -- Magnetic insulator -- Metal-oxygen bonds -- Nonlinear oscillation -- Occupation numbers -- Temperature values -- Ultra-fast dynamics -- Spin fluctuations
Аннотация: Within the multielectron model of magnetic insulator with two different spin terms at each cation and spin crossover under high pressure we have studied dynamics of a sudden excited non equilibrium spin state. We obtain the different relaxation of the magnetization, high spin/low spin occupation numbers, and the metal-oxygen bond length for different values of the external pressure. For each pressure-temperature values stationary state agrees to the mean field phase diagrams. We found the long living oscillations of magnetization for the high spin ground state at small pressure. Close to crossover pressure the smooth relaxation is accompanied with a set of sharp strongly non linear oscillations of magnetization and HS/LS occupation numbers that are accompanied by the Franck–Condon resonances.

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Публикация на русском языке Светоиндуцированная сверхбыстрая динамика систем со спиновым кроссовером при высоком давлении [Текст] / Ю. С. Орлов, С. В. Николаев, А. И. Нестеров, С. Г. Овчинников // Журн. эксперим. и теор. физ. - 2021. - Т. 159 Вып. 3. - С. 479-499

Держатели документа:
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
CUCEI, Universidad de Guadalajara, Guadalajara, Jalisco CP 44420, Mexico

Доп.точки доступа:
Orlov, Yu. S.; Орлов, Юрий Сергеевич; Nikolaev, S. V.; Николаев, Сергей Викторович; Nesterov, A. I.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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Orlov, Yu. S.
Light-Induced Ultrafast Quantum Relaxation Dynamics of Magnetically Ordered Spin Crossover Systems under High Pressure / Yu. S. Orlov, S. V. Nikolaev, S. G. Ovchinnikov // International conference "Functional materials" : book of abstracts / ed. V. N. Berzhansky ; org. com. S. G. Ovchinnikov [et al.]. - Simferopol, 2021. - P. 46

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Доп.точки доступа:
Berzhansky, V. N. \ed.\; Бержанский, Владимир Наумович; Ovchinnikov, S. G. \org. com.\; Овчинников, Сергей Геннадьевич; Nikolaev, S. V.; Николаев, Сергей Викторович; Ovchinnikov, S. G.; Орлов, Юрий Сергеевич; "Functional materials", International conference(2021 ; Oct. 4-8 ; Alushta, Russia); Крымский федеральный университет имени В.И. Вернадского
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    Unraveling the ultrafast self-assembly and photoluminescence in zero-dimensional Mn2+-based halides with narrow-band green emissions / G. Zhou, Q. Ren, M. S. Molokeev [et al.] // ACS Appl. Electron. Mater. - 2021. - Vol. 3, Is. 9. - P. 4144-4150, DOI 10.1021/acsaelm.1c00606. - Cited References: 37. - This work is supported by the Natural Science Foundation of China (no. 21871167) and the 1331 project of Shanxi Province and funded by RFBR according to the research project no. 19-52-80003 . - ISSN 2637-6113
   Перевод заглавия: Открытие сверхбыстрой самосборки и фотолюминесценции в галогенидах на основе Mn2+ с нулевой размерностью и узкополосной зеленой эмиссией
Кл.слова (ненормированные):
zero-dimensional Mn2+-based halides -- ultrafast self-assembly -- photoluminescence -- white LEDs -- solid-state displays
Аннотация: The discovery of narrow-band luminescent materials remains an immense challenge to optimize the performance of white light-emitting diodes (LEDs). So far, the zero-dimensional (0D) Mn2+-based halides with near-unity narrow-band emissions have emerged as a class of promising phosphors in solid-state displays, but the related large-scale synthesis strategies have not been proposed and evaluated. Herein, we report an in situ synthetic process of 0D Mn2+-based halides and utilize (C20H20P)2MnBr4 as a case to investigate the photoluminescence characteristics and the structural essence of ultrafast self-assembly. The bright green emission peak at 523 nm with a full width at half maximum of 48 nm for (C20H20P)2MnBr4 is attributed to the d–d transition (4T1–6A1) of tetrahedrally coordinated [MnBr4]2– centers, and the fabricated white LED device shows a wide color gamut of 103.7% National Television System Committee (NTSC) standard. Remarkably, the experimental and theoretical results indicate that there are hydrogen bonding of C–H···Br and weak van der Waals interactions between [C20H20P]+ and [MnBr4]2–, resulting in the root for the realization of ultrafast self-assembly in 0D Mn2+-based halides. This work reveals a feasible and general synthesis method for preparing 0D Mn2+-based halides, thereby providing a possibility for their industrial application in solid-state displays.

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Держатели документа:
Key Laboratory of Magnetic Molecules and Magnetic Information Materials (Ministry of Education), School of Chemistry and Material Science, Shanxi Normal University, Linfen, 041004, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center Ksc Sb Ras, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Research and Development Department, Kemerovo State University, Kemerovo, 650000, Russian Federation
State Key Lab. of Luminescent Materials and Devices and Institute of Optical Communication Materials, South China University of Technology, Guangzhou, 510641, China
Coll. of Chem. and Chem. Eng., Key Lab. of Interface Sci. and Eng. in Adv. Mat., Min. of Education, Taiyuan University of Technology, Shanxi, Taiyuan, 030024, China

Доп.точки доступа:
Zhou, G.; Ren, Q.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zhou, Y.; Zhang, J.; Zhang, X. -M.
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Electron-rotation coupling in diatomics under strong-field excitation / Y. R. Liu, Y. Wu, J. G. Wang [et al.] // Phys. Rev. A. - 2020. - Vol. 102, Is. 3. - Ст. 033114, DOI 10.1103/PhysRevA.102.033114. - Cited References: 78. - S.B.Z. thanks H. D. Meyer for his helpful instructions of Wigner-DVR in MCTDH. Grants from the National Basic Research Program of China (2017YFA0403200), NSFC (No. 11604197, No. 11974230, and No. 11934004), the Science Challenge Program of China (TZ2018005 and TZ2016005) are acknowledged. V.K. acknowledges financial support from Swedish Research Council (VR) and the Ministry of Science and High Education of Russian Federation, Project No. FSRZ2020-0008. . - ISSN 2469-9926. - ISSN 2469-9934

РУБ Optics + Physics, Atomic, Molecular & Chemical
Рубрики:
REAL-TIME OBSERVATION
   DYNAMICS
   LASER
   ULTRAFAST
   MOLECULES
Аннотация: he photoexcitation and photodissociation of diatomic molecules by intense pulse lasers has been the subject of extensive investigations over the past decades. However, the usually employed theoretical framework neglects the coupling between the molecular rotational angular momentum (R) and the angular momentum of the electrons projected onto the molecular axis Ω=Λ+Σ, which results in the known Λ-doubling phenomenon in high-resolution electronic spectra of diatomic molecules. While neglecting this coupling is an excellent approximation in the weak-field or perturbative regime owing to the large mass difference between the rotating atoms and the electrons, the approximation breaks down for intense laser pulses because of the repeated Rabi cycling of the electronic transitions, which can have a significant effect on the rotational degrees of freedom of the molecule. By correcting the transition dipole matrix elements and introducing angular basis sets based on Wigner D functions, the conventional theoretical treatment is generalized to a universal description valid for both the weak- and strong-field regimes. The theoretical treatment developed here is applied to the ∣1Σ› to ∣1Π› transitions in diatomic systems. Our results reveal that, for field intensities resulting in about one Rabi cycling for extreme ultraviolet or x-ray transitions, the theoretical predictions by the conventional theoretical frame need to be corrected when considering observables such as the molecular alignment and the angular distribution of the photofragments.

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Держатели документа:
Shaanxi Normal Univ, Sch Phys & Informat Technol, Xian 710119, Peoples R China.
Inst Appl Phys & Computat Math, POB 8009, Beijing 100088, Peoples R China.
Peking Univ, Ctr Appl Phys & Technol, Beijing 100084, Peoples R China.
Heidelberg Univ, Phys Chem Inst, Theoret Chem, Neuenheimer Feld 229, D-69120 Heidelberg, Germany.
Royal Inst Technol, Theoret Chem & Biol, S-10691 Stockholm, Sweden.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Liu, Yan Rong; Wu, Yong; Wang, Jian Guo; Vendrell, Oriol; Kimberg, V.; Кимберг, Виктор Валерьевич; Zhang, Song Bin
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Core-hole localization and ultra-fast dissociation in SF6 / V. Ekholm, G. S. Chiuzbaian, C. Sathe [et al.] // J. Phys. B. - 2020. - Vol. 53, Is. 18. - Ст. 185101, DOI 10.1088/1361-6455/aba204. - Cited References: 36. - This work was supported by the Swedish Research Council (VR). The calculations were performed on resources provided by the Swedish National Infrastructure for Computing (SNIC). FG acknowledges support within the Russian Science Foundation (Project No. 16-12-10109) . - ISSN 0953-4075. - ISSN 1361-6455

РУБ Optics + Physics, Atomic, Molecular & Chemical
Рубрики:
X-RAY-EMISSION
   SYMMETRY-BREAKING
   AB-INITIO
   SPECTROSCOPY
   SPECTRA
Кл.слова (ненормированные):
SF6 -- resonant inelastic x-ray scattering -- symmetry selection rules -- ultrafast dynamics -- vibronic couplings
Аннотация: Resonant inelastic x-ray scattering spectra excited at the fluorine K resonances of SF6 have been recorded. While a small but significant propensity for electronically parity-allowed transitions is found, the observation of parity-forbidden electronic transitions is attributed to vibronic coupling that breaks the global inversion symmetry of the electronic wavefunction and localizes the core hole. The dependence of the scattering cross section on the polarization of the incident radiation and the scattering angle is interpreted in terms of local π/σ symmetry around the S–F bond. This symmetry selectivity prevails during the dissociation that occurs during the scattering process.

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Держатели документа:
Lund Univ, MAX IV Lab, Box 118, SE-22100 Lund, Sweden.
Uppsala Univ, Dept Phys & Astron, Box 516, SE-75120 Uppsala, Sweden.
Sorbonne Univ, F-75005 Paris, France.
CNRS, LCPMR, F-75005 Paris, France.
Synchrotron SOLEIL, LOrme Merisiers, BP 48, F-91192 Gif Sur Yvette, France.
Ctr Nacl Pesquisa Energia & Mat CNPEM, BR-10000 Campinas, Brazil.
Royal Inst Technol, Sch Biotechnol, Theoret Chem & Biol, S-10691 Stockholm, Sweden.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Stockholm Univ, AlbaNova Univ Ctr, Dept Phys, SE-10691 Stockholm, Sweden.

Доп.точки доступа:
Ekholm, V.; Chiuzbaian, G. S.; Sathe, C.; Nicolaou, A.; Guarise, M.; Simon, M.; Jaouen, N.; Luning, J.; Hague, C. F.; Gel'mukhanov, F.; Гельмуханов, Фарис Хафизович; Odelius, M.; Bjorneholm, O.; Rubensson, J-E; Swedish Research Council (VR)Swedish Research Council; Russian Science FoundationRussian Science Foundation (RSF) [16-12-10109]
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Ultrafast Quantum Relaxation Dynamics of Magnetically Ordered Systems with Spin Crossover in an Excited State under a Sudden Perturbation / Y. S. Orlov, S. V. Nikolaev, S. G. Ovchinnikov, A. I. Nesterov // JETP Letters. - 2020. - Vol. 112, Is. 4. - P. 250-256, DOI 10.1134/S0021364020160109. - Cited References: 27. - This work was supported by the Russian Science Foundation (project no. 18-12-00022) . - ISSN 0021-3640. - ISSN 1090-6487
Аннотация: A theoretical model based on the relaxation equation for the density matrix has been proposed to describe the ultrafast time dynamics of magnetically ordered systems with spin crossover in an excited state under a sudden perturbation. Oscillations of the magnetization, the population of the high-spin state, and the generation of local vibrons at a transition of the system from the light-excited Franck-Condon low-spin state to the highspin ground state.

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Публикация на русском языке Сверхбыстрая квантовая динамика релаксации магнитоупорядоченных систем со спиновым кроссовером в возбужденном состоянии при внезапном возмущении [Текст] / Ю. С. Орлов, С. В. Николаев, С. Г. Овчинников, А. И. Нестеров // Письма в ЖЭТФ. - 2020. - Т. 112 Вып. 4. - С. 268-274

Держатели документа:
Russian Acad Sci, Siberian Branch, Fed Res Ctr KSC, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Univ Guadalajara, Ctr Univ Ciencias Exactas & Ingn CUCEI, Guadalajara 44420, Jalisco, Mexico.

Доп.точки доступа:
Orlov, Yu. S.; Орлов, Юрий Сергеевич; Nikolaev, S. V.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Nesterov, A. I.
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Resonant Pumping of d-d Crystal Field Electronic Transitions as a Mechanism of Ultrafast Optical Control of the Exchange Interactions in Iron Oxides / R. V. Mikhaylovskiy, T. J. Huisman, V. A. Gavrichkov [et al.] // Phys. Rev. Lett. - 2020. - Vol. 125, Is. 15. - Ст. 157201, DOI 10.1103/PhysRevLett.125.157201. - Cited References: 46. - We thank A. Toonen and S. Semin for technical assistance. The work at Radboud University was supported by de Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO) and the European Research Council ERC Grant Agreement No. 339813 (Exchange). R. V. M. thanks ERC, Grant Agreement No. 852050 (MAGSHAKE). V. A. G., S. I. P., and S. G. O. are thankful to the Russian Science Foundation for the financial support under the Grant No. 18-12-00022. The theoretical part of this research was performed by V. A. G., S. I. P., and S. G. O. under the RSF Grant No. 18-12-00022. The contribution of R. V. P. into the experimental part was supported by the RSF Grant No. 16-12-10456 . - ISSN 0031-9007. - ISSN 1079-7114
Рубрики:
BORATE
Аннотация: The microscopic origin of ultrafast modification of the ratio between the symmetric (J) and antisymmetric (D) exchange interaction in antiferromagnetic iron oxides is revealed, using femtosecond laser excitation as a pump and terahertz emission spectroscopy as a probe. By tuning the photon energy of the laser pump pulse we show that the effect of light on the D/J ratio in two archetypical iron oxides FeBO3 and ErFeO3 is maximized when the photon energy is in resonance with a spin and parity forbidden d-d transition between the crystal-field split states of Fe3+ ions. The experimental findings are supported by a multielectron model, which accounts for the resonant absorption of photons by Fe3+ ions. Our results reveal the importance of the parity and spin-change forbidden, and therefore often underestimated, d-d transitions in ultrafast optical control of magnetism.

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Radboud Univ Nijmegen, Inst Mol & Mat, Heyendaalseweg 135, NL-6525 AI Nijmegen, Netherlands.
Univ Lancaster, Dept Phys, Lancaster LA1 4YW, England.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Delft Univ Technol, Kavli Inst Nanosci, POB 5046, NL-2600 GA Delft, Netherlands.
Russian Acad Sci, Ioffe Phys Tech Inst, St Petersburg 194021, Russia.

Доп.точки доступа:
Mikhaylovskiy, R., V; Huisman, T. J.; Gavrichkov, V. A.; Гавричков, Владимир Александрович; Polukeev, S. I.; Полукеев, Семен Игоревич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Afanasiev, D.; Pisarev, R., V; Rasing, T.h.; Kimel, A., V
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10.

    Ultrafast method of fullerenes extraction from carbon condensate / G. N. Churilov [et al.] // Fuller. Nanotub. Carbon Nanostruct. - 2019. - Vol. 27, Is. 3. - P. 225-232, DOI 10.1080/1536383X.2018.1543277. - Cited References: 46. - The authors are grateful to Alexey Popov (Leibniz Institute for Solid State and Materials Research, Dresden, German) for his contribution in conducting mass spectrometer studies. . - ISSN 1536-383X
   Перевод заглавия: Сверхбыстрый метод выделения фуллеренов из углеродного конденсата
Кл.слова (ненормированные):
solution extraction -- mechanical extraction -- fullerenes -- Soxhlet
Аннотация: The Soxhlet extraction method (SE) only used in the extraction of fullerenes from carbon condensate (CC) obtained in the fullerene production facility, which in the literature is often referred to as carbon black, does not provide complete extraction. Fullerenes can also be extracted from the CC suspension and the solvent by the mechanical extraction method (ME) and show higher degree of extraction efficiency. This method combined with filtration process takes only a few minutes and allows a significant reduction in solvent consumption. Extraction via the ME method application makes it possible to carry out extraction of fullerenes twenty times faster than by the SE method. It can be used as an independent method, bypassing the extraction by the SE method, and also as an additional one. Application of the ME method allows additional extraction of fullerenes weight percentage from the CC, after extracting fullerenes from it applying the SE method. In this instance the higher fullerenes prevail in the essences extracted by the ME method with their content reaching as high as 39.50 wt%. The obtained samples of fullerene mixtures (FM) are characterized by the methods of high-performance liquid chromatography and mass spectrometry. Analysis of the results shows that the composition of the FM, isolated by the ME method, differs from the compositions extracted via the ME method.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center "Krasnoyarsk Science Center SB RAS", Krasnoyarsk, Russia
Siberian Federal University, Av. Svobodny 79, 660041 Krasnoyarsk, Russia

Доп.точки доступа:
Churilov, G. N.; Чурилов, Григорий Николаевич; Elesina, V. I.; Елесина, Виктория Игоревна; Dudnik, A. I.; Дудник, Александр Иванович; Vnukova, N. G.; Внукова, Наталья Григорьевна
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