Impurity-induced electronic nematic state and C2-symmetric nanostructures in iron pnictide superconductors
Yoshio Inoue, Youichi Yamakawa, Hiroshi Kontani
DOI 10.1103/PhysRevB.85.224506 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We propose that an impurity-induced electronic nematic state is realized above the orthorhombic structure transition temperature TS in iron-pnictide superconductors. In the presence of strong orbital fluctuations near TS, it is theoretically revealed that a single impurity induces local orbital order with C2 symmetry, consistently with recent Scanning Tunneling Microscopy/Spectroscopy (STM/STS) measurements. Each impurity-induced C2-symmetric nanostructure aligns along the a axis by applying tiny uniaxial pressure along the b axis. In this impurity-induced nematic phase, the resistivity shows sizable in-plane anisotropy (ρb/ρa∼2) even above TS, actually observed in various “detwinned” samples. The present study indicates the existence of strong orbital fluctuations in iron-pnictide superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba(Fe,Co)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| BaFe2(As,P)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| LiFeAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| BaFe1.89-2xZn2xCo0.11As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| (K,Ba)Fe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Impurity states and cooperative magnetic order in Fe-based superconductors
similarity 0.96Maria N. Gastiasoro et al.
Source status unknown — claims are unverified
Enhancement of Magnetic Stripe Order in Iron-Pnictide Superconductors from the Interaction between Conduction Electrons and Magnetic Impurities
similarity 0.96Maria N. Gastiasoro & Brian M. Andersen
Source status unknown — claims are unverified
Thermoelectric signature of the nematic phase in hole-doped iron-based superconductors
similarity 0.96Marcin Matusiak & Michał Babij
Source status unknown — claims are unverified
Competition between superconductivity and magnetic/nematic order as a source of anisotropic superconducting gap in underdoped Ba1−xKxFe2As2
similarity 0.96H. Kim et al.
Source status unknown — claims are unverified
Impurity-Induced Electronic Nematic State in Iron-Pnictide Superconductors
similarity 0.95Yoshio Inoue et al. · 2011 · arXiv:1110.2401
Source status unknown — claims are unverified
Small-q phonon-mediated unconventional superconductivity in the iron pnictides
similarity 0.95A. Aperis et al.
Source status unknown — claims are unverified