Campus Units
Physics and Astronomy, Ames Laboratory
Document Type
Article
Publication Version
Published Version
Publication Date
4-1-2011
Journal or Book Title
Physical Review B
Volume
83
Issue
13
First Page
134505
DOI
10.1103/PhysRevB.83.134505
Abstract
Intrinsic, in-plane anisotropy of electrical resistivity was studied on mechanically detwinned single crystals of SrFe2As2 above and below the temperature of the coupled structural/magnetic transition, T-TO. Resistivity is smaller for electrical current flow along the orthorhombic a(o) direction (direction of antiferromagnetically alternating magnetic moments) and is larger for transport along the b(o) direction (direction of ferromagnetic chains), which is similar to CaFe2As2 and BaFe2As2 compounds. A strongly first-order structural transition in SrFe2As2 was confirmed by high-energy x-ray measurements, with the transition temperature and character unaffected by moderate strain. For small strain levels, which are just sufficient to detwin the sample, we find a negligible effect on the resistivity above TTO. With the increase of strain, the resistivity anisotropy starts to develop above TTO, clearly showing the relation of anisotropy to an anomalously strong response to strain. Our study suggests that electronic nematicity cannot be observed in the FeAs-based compounds in which the structural transition is strongly first order.
Copyright Owner
American Physical Society
Copyright Date
2011
Language
en
File Format
application/pdf
Recommended Citation
Blomberg, E. C.; Tanatar, Makariy A.; Kreyssig, Andreas; Ni, Ni; Thaler, Alexander N.; Hu, Rongwei; Bud’ko, Sergey L.; Canfield, Paul C.; Goldman, Alan I.; and Prozorov, Ruslan, "In-plane anisotropy of electrical resistivity in strain-detwinned SrFe2As2" (2011). Physics and Astronomy Publications. 674.
https://lib.dr.iastate.edu/physastro_pubs/674
Comments
This article is published as Blomberg, E. C., M. A. Tanatar, A. Kreyssig, N. Ni, A. Thaler, Rongwei Hu, S. L. Bud’ko, P. C. Canfield, A. I. Goldman, and R. Prozorov. "In-plane anisotropy of electrical resistivity in strain-detwinned SrFe 2 As 2." Physical Review B 83, no. 13 (2011): 134505. DOI: 10.1103/PhysRevB.83.134505. Posted with permission.