THE INFLUENCE OF EXTERNAL PRESSURE ON THE BEHAVIOR OF THE METALLIC PHASE IN ORGANIC QUASI-TWO-DIMENSIONAL CONDUCTOR к-(BEDT - TTF)2Hg(SCN)2Cl. CONTRIBUTION OF CORRELATION EFFECTS
- Authors: Pesotskiy S.I.1, Lyubovskiy R.B.1, Zverev V.N.2, Grigor'ev P.D.3,4, Mogilyuk T.I.5, Torunova S.A.1, Zhilyaeva E.I.1
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Affiliations:
- FRC of Problems of Chemical Physics and Medical Chemistry of the Russian Academy of Sciences
- Osipyan Institute of Solid State Physics of the Russian Academy of Sciences
- Landau Institute for Theoretical Physics of the Russian Academy of Sciences
- National University of Science and Technology MISIS
- National Research Center Kurchatov Institute
- Issue: Vol 165, No 5 (2024)
- Pages: 710-717
- Section: Articles
- URL: https://journals.rcsi.science/0044-4510/article/view/259031
- DOI: https://doi.org/10.31857/S0044451024050109
- ID: 259031
Cite item
Abstract
The quasi-two-dimensional organic metal к-(BEDT-TTF)2Hg(SCN)2Cl transfers to a Mott insulator state when cooled below T = 30 K. External hydrostatic pressure of P > 0.7 kbar restores the metallic state and enables the study of resistance, magnetoresistance, and Shubnikov–de Haas oscillations at helium temperatures in the external pressure range of P = (1-8) kbar. The spectrum of observed Shubnikov–de Haas oscillations agrees well with theoretical calculations of the band structure. At the same time, the oscillation characteristics (cyclotron mass, frequency, amplitude) are significantly influenced by electronic correlations. Strongly correlated systems also exhibit specific temperature dependence of resistance. Pressure serves as the main tool controlling the strength of correlations. Various versions of pressure influence on the behavior of the nonoscillating part of magnetoresistance are discussed.
About the authors
S. I. Pesotskiy
FRC of Problems of Chemical Physics and Medical Chemistry of the Russian Academy of Sciences
Email: pesot@icp.ac.ru
Russian Federation, 142432, Chernogolovka, Moscow region
R. B. Lyubovskiy
FRC of Problems of Chemical Physics and Medical Chemistry of the Russian Academy of Sciences
Email: pesot@icp.ac.ru
Russian Federation, 142432, Chernogolovka, Moscow region
V. N. Zverev
Osipyan Institute of Solid State Physics of the Russian Academy of Sciences
Email: pesot@icp.ac.ru
Russian Federation, 142432, Chernogolovka, Moscow region
P. D. Grigor'ev
Landau Institute for Theoretical Physics of the Russian Academy of Sciences; National University of Science and Technology MISIS
Email: pesot@icp.ac.ru
142432, Chernogolovka, Moscow region; 119049, Moscow
T. I. Mogilyuk
National Research Center Kurchatov Institute
Email: pesot@icp.ac.ru
123182, Moscow
S. A. Torunova
FRC of Problems of Chemical Physics and Medical Chemistry of the Russian Academy of Sciences
Email: pesot@icp.ac.ru
Russian Federation, 142432, Chernogolovka, Moscow region
E. I. Zhilyaeva
FRC of Problems of Chemical Physics and Medical Chemistry of the Russian Academy of Sciences
Author for correspondence.
Email: pesot@icp.ac.ru
Russian Federation, 142432, Chernogolovka, Moscow region
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