Rotation of reflectivity anisotropy due to uniaxial strain along [110]tetr in the electron-doped Fe-based superconductor Ba(Fe0.955Co0.045)2As2
Inho Kwak, Soonsang Huh, Min-Cheol Lee, Younsik Kim, Bumjoo Lee, Y. S. Lee, C. W. Seo, Byung Cheol Park, Thomas Wolf, Changyoung Kim, Tae Won Noh, K. W. Kim
DOI 10.1103/PhysRevB.101.165136 · Physical Review B
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Abstract
We present a strain-dependent time-resolved reflectometry experiment on Ba(Fe0.955Co0.045)2As2 in the nematic state. Uniaxial external pressure has usually been applied to obtain a single nematic domain. However, reflectivity with and without pumping under uniaxial strain along [110]tetr reveals an unexpected nematicity of which C4 symmetry-breaking orientation is rotated by 20∘. Our observation suggests a microscopic coexistence of B2g and B1g nematicity under uniaxial strain and possibly of an XY-type nematic order in the electron-doped iron pnictide.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba(Fe0.955Co0.045)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 14 | Pressure not reported | unknown |
| RbFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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