Crystal structure and electronic band structure of the organic superconductor α-(BEDT-TTF)2NH4HG(SCN)4 under uniaxial strain

Ryusuke Kondo, Seiichi Kagoshima, Mitsuhiko Maesato

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

In order to investigate the relationship between the crystal structure and electronic properties, crystal structure analysis of the organic superconductor α-(BEDT-TTF)2NH4Hg(SCN)4, where BEDT-TTF is the abbreviation of bis (ethylenedithio)tetrathiafulvalene, was performed under uniaxial compressive strain along each crystal axis. It was found that (i) almost ideal uniaxial strain was realized, that is, the unit cell was compressed only along the direction parallel to the external force; (ii) the calculated Fermi surface in the two-dimensional conducting layer was reduced along the kc axis and expanded along the ka axis under b'- and c-axial strains, but vice versa under a-axial strain; and (iii) changes in the density of states at the Fermi level [DOS(EF)] calculated from the obtained structures were qualitatively consistent with the observed change of the superconducting transition temperature.

Original languageEnglish
Article number134519
Pages (from-to)1345191-1345196
Number of pages6
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume67
Issue number13
Publication statusPublished - Apr 2003
Externally publishedYes

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organic superconductors
axial strain
Band structure
Superconducting materials
Crystal structure
crystal structure
electronics
abbreviations
DOS
Fermi surfaces
Fermi surface
Fermi level
transition temperature
Electronic properties
Superconducting transition temperature
conduction
cells
Crystals
crystals
BEDT-TTF

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Crystal structure and electronic band structure of the organic superconductor α-(BEDT-TTF)2NH4HG(SCN)4 under uniaxial strain. / Kondo, Ryusuke; Kagoshima, Seiichi; Maesato, Mitsuhiko.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 67, No. 13, 134519, 04.2003, p. 1345191-1345196.

Research output: Contribution to journalArticle

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