Stress-induced nematicity in studied by Raman spectroscopy
Here, we use polarized Raman scattering to study the structural phase transition in EuFe 2 As 2 , the parent compound of the 122-ferropnictide superconductors. The in-plane lattice anisotropy is characterized by measurements of the side surface with different strains induced by different preparation methods. We also show that while a fine surface polishing leaves the samples free of residual internal strain, in which case the onset of the C 4 symmetry breaking is observed at the nominal structural phase transition temperature T S , cutting the side surface induces a permanent fourfold rotational symmetry breaking spanning tens of degrees above T S .
- Authors:
-
[1];
[2];
[3];
[3];
[4]
- Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics and Inst. of Physics; Rutgers Univ., Piscataway, NJ (United States). Dept. of Physics and Astronomy
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
- Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics and Inst. of Physics; Collaborative Innovation Center of Quantum Matter, Beijing (China)
- Rutgers Univ., Piscataway, NJ (United States). Dept. of Physics and Astronomy; National Inst. of Chemical Physics and Biophysics, Tallinn (Estonia)
- Publication Date:
- Grant/Contract Number:
- AC05-00OR22725; SC0005463
- Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 94; Journal Issue: 1; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Research Org:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
- OSTI Identifier:
- 1360053
- Alternate Identifier(s):
- OSTI ID: 1263722