Electron states and Fermi surfaces in the organic superconductor κ-(BEDT-TTF $)_{2}$ Cu[N(CN $)_{2}$ ]Br

1 February 1997

journal article
research article
Published by American Physical Society (APS) in Physical Review B

Vol. 55 (5) , 2780-2783
https://doi.org/10.1103/physrevb.55.2780

Abstract

The electronic structure and the Fermi surfaces of the organic superconductor κ-(BEDT-TTF

)_{2}

Cu[N(CN

)_{2}

]Br are elucidated by first-principles calculations. The results show very narrow bands, high state density at the Fermi level, and a small band effective mass of 0.

{28 m}_{0}

for the closed hole orbit. The topological features of the Fermi surfaces with multiple sheets are more complicated than that of κ-(BEDT-TTF

)_{2}

Cu(NCS

)_{2}

. Fermi electron distribution on the central C=C double bond reveals the nonequivalency of the two central C atoms.

Keywords

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Electron states and Fermi surfaces in the organic superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br

Abstract

Keywords

Electron states and Fermi surfaces in the organic superconductor κ-(BEDT-TTF $)_{2}$ Cu[N(CN $)_{2}$ ]Br