Temperature-pressure phase diagram and electronic properties of the organic metal kappa-(BETS)(2)Mn[N(CN)(2)](3) - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2010

Temperature-pressure phase diagram and electronic properties of the organic metal kappa-(BETS)(2)Mn[N(CN)(2)](3)

V. N. Zverev
  • Fonction : Auteur
M. V. Kartsovnik
  • Fonction : Auteur
W. Biberacher
  • Fonction : Auteur
S. S. Khasanov
  • Fonction : Auteur
R. P. Shibaeva
  • Fonction : Auteur
Loic Toupet
N. D. Kushch
  • Fonction : Auteur
E. B. Yagubskii
  • Fonction : Auteur

Résumé

The crystal and electronic band structures as well as the transport properties of the recently synthesized layered radical cation salt kappa-(BETS)(2)Mn[N(CN)(2)](3) are investigated. It is shown that this salt is more anisotropic in the plane of conducting layers than other kappa phases, a feature which noticeably influences its physical behavior. A phase transition resulting in the formation of an incommensurate superstructure below 102 K has been found. At temperature below 30 K a metal-insulator transition is observed. We argue that the transition is associated with electronic interactions rather than with structural changes. The T-P phase diagram has been studied under He-4 gas pressure up to 2.5 kbar. At moderately high pressure P approximate to 0.5 kbar the metal-insulating transition is suppressed and the crystal becomes superconducting with T-c approximate to 5.7 K. In the pressurized metallic state, Shubnikov-de Haas oscillations have been found, revealing a very small closed Fermi surface with a high-effective cyclotron mass influenced by many-body interactions.
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hal-01073275 , version 1 (09-10-2014)

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V. N. Zverev, M. V. Kartsovnik, W. Biberacher, S. S. Khasanov, R. P. Shibaeva, et al.. Temperature-pressure phase diagram and electronic properties of the organic metal kappa-(BETS)(2)Mn[N(CN)(2)](3). Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2010, 82 (15), pp.155123. ⟨10.1103/PhysRevB.82.155123⟩. ⟨hal-01073275⟩
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