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Title: Fermi surface properties of the bifunctional organic metal κ-(BETS)2Mn[N(CN)2]3 near the metal-insulator transition
Author: Zverev, V.N.
Biberacher, W.
Oberbauer, S.
Sheikin, I.
Alemany i Cahner, Pere
Canadell, Enric, 1950-
Kartsovnik M.V.
Keywords: Estructura electrònica
Teoria del funcional de densitat
Electronic structure
Density functionals
Issue Date: 21-Mar-2019
Publisher: American Physical Society
Abstract: We present detailed studies of the high-field magnetoresistance of the layered organic metal κ-(BETS)2Mn- [N(CN)2]3 under a pressure slightly above the insulator-metal transition. The experimental data are analyzed in terms of the Fermi surface properties and compared with the results of first-principles band structure calculations. The calculated size and shape of the in-plane Fermi surface are in very good agreement with those derived from Shubnikov-de Haas oscillations as well as the classical angle-dependent magnetoresistance oscillations. A comparison of the experimentally obtained effective cyclotron masses with the calculated band masses reveals electron correlations significantly dependent on the electron momentum. The momentum- or band-dependent mobility is also reflected in the behavior of the classical magnetoresistance anisotropy in a magnetic field parallel to layers. Other characteristics of the conducting system related to interlayer charge transfer and scattering mechanisms are discussed based on the experimental data. Besides the known high-field effects associated with the Fermi surface geometry, new pronounced features have been found in the angle-dependent magnetoresistance, which might be caused by coupling of the metallic charge transport to a magnetic instability in proximity to the metal-insulator phase boundary.
Note: Reproducció del document publicat a:
It is part of: Physical Review B, 2019, vol. 99, p. 125136
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ISSN: 2469-9950
Appears in Collections:Articles publicats en revistes (Institut de Química Teòrica i Computacional (IQTCUB))
Articles publicats en revistes (Ciència dels Materials i Química Física)

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