In-plane anisotropy of transport coefficients in electronic nematic states: Universal origin of nematicity in Fe-based superconductors

Seiichiro Onari, Hiroshi Kontani

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The origin of the electronic nematicity and its remarkable material dependence are famous longstanding unsolved issues in Fe-based superconductors. To attack these issues, we focus on the in-plane anisotropy of the resistivity: In the nematic state in FeSe, the relation ρx>ρy holds, where ρx(y) is the resistivity along the longer (shorter) Fe-Fe axis. In contrast, the opposite anisotropy ρx<ρy is realized in other undoped Fe-based superconductors. Such nontrivial material dependence is naturally explained in terms of the strongly orbital-dependent inelastic quasiparticle scattering realized in the orbital-ordered state. The opposite anisotropy between FeSe (ρx>ρy) and other undoped compounds (ρx<ρy) reflects the difference in the number of hole pockets. We also explain the large in-plane anisotropy of the thermoelectric power in the nematic state.

Original languageEnglish
Article number094527
JournalPhysical Review B
Volume96
Issue number9
DOIs
Publication statusPublished - Sep 26 2017

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'In-plane anisotropy of transport coefficients in electronic nematic states: Universal origin of nematicity in Fe-based superconductors'. Together they form a unique fingerprint.

Cite this