Fermi surface and in-plane anisotropy of the layered organic superconductor kappaL-(DMEDO-TSeF)2[Au(CN)4](THF) with domain structures

Tadashi Kawamoto; Takehiko Mori; Yamaguchi Takahide; Shinya Uji; David Graf; James S. Brooks; Takashi Shirahata; Megumi Kibune; Hiroko Yoshino; Tatsuro Imakubo

Publication Information

Title

Japanese:
English:	Fermi surface and in-plane anisotropy of the layered organic superconductor kappa_L-(DMEDO-TSeF)₂[Au(CN)₄](THF) with domain structures

Author

Language

English

Journal/Book name

Japanese:
English:	Phys. Rev. B

Volume, Number, Page

Vol. 83 No. 1 pp. 012505

Published date

Jan. 2011

Publisher

Japanese:
English:	American Physical Society

Conference name

Japanese:
English:

Conference site

Japanese:
English:

File

Official URL

http://prb.aps.org/abstract/PRB/v83/i1/e012505

Abstract

The Fermi surface of the layered organic superconductor kappa_L_-(DMEDO-TSeF)_2_[Au(CN)_4_](THF) has been investigated, where DMEDO-TSeF is dimethyl (ethylenedioxy) tetraselenafulvalene. Band-structure calculations show that the fundamental Fermi surface is not circular, but elliptical with an eccentricity of 0.76, leading to a large orbital overlap in the extended Brillouin zone. This symmetry is lowered by a structural phase transition at 209 K at which domains form. The magnetic breakdown orbit is observed in the Shubnikov–de Haas oscillations under the low-field region, consistent with the small energy gap at the zone boundary. The observation of the Shubnikov–de Haas effect shows that the present compound has a clean electronic system despite the domain structures.

Home

Search

Support

About T2R2

Related Links

Publication Information