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
N1 - Funding Information:
We are grateful to Y. Yamakawa and T. Fujii for valuable discussions. This work was supported by JSPS KAKENHI Grant No. JP17K05543. Part of numerical calculations was performed on the Yukawa Institute Computer Facility. APPENDIX A:
Publisher Copyright:
© 2017 American Physical Society.
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.
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U2 - 10.1103/PhysRevB.96.094527
DO - 10.1103/PhysRevB.96.094527
M3 - Article
AN - SCOPUS:85029929328
SN - 2469-9950
VL - 96
JO - Physical Review B
JF - Physical Review B
IS - 9
M1 - 094527
ER -