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 journalArticle

6 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

Fingerprint

Anisotropy
transport properties
anisotropy
electronics
electrical resistivity
Thermoelectric power
attack
Iron-based Superconductors

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

In-plane anisotropy of transport coefficients in electronic nematic states : Universal origin of nematicity in Fe-based superconductors. / Onari, Seiichiro; Kontani, Hiroshi.

In: Physical Review B, Vol. 96, No. 9, 094527, 26.09.2017.

Research output: Contribution to journalArticle

@article{65a8cd16e1ad4517966d96a08d5c9b07,
title = "In-plane anisotropy of transport coefficients in electronic nematic states: Universal origin of nematicity in Fe-based superconductors",
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.",
author = "Seiichiro Onari and Hiroshi Kontani",
year = "2017",
month = "9",
day = "26",
doi = "10.1103/PhysRevB.96.094527",
language = "English",
volume = "96",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "9",

}

TY - JOUR

T1 - In-plane anisotropy of transport coefficients in electronic nematic states

T2 - Universal origin of nematicity in Fe-based superconductors

AU - Onari, Seiichiro

AU - Kontani, Hiroshi

PY - 2017/9/26

Y1 - 2017/9/26

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85029929328&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85029929328&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.96.094527

DO - 10.1103/PhysRevB.96.094527

M3 - Article

AN - SCOPUS:85029929328

VL - 96

JO - Physical Review B

JF - Physical Review B

SN - 2469-9950

IS - 9

M1 - 094527

ER -