Campus Units
Physics and Astronomy, Ames Laboratory
Document Type
Article
Publication Version
Published Version
Publication Date
6-1-2013
Journal or Book Title
Physical Review B
Volume
87
Issue
22
First Page
224508
DOI
10.1103/PhysRevB.87.224508
Abstract
We demonstrate that the thermopower (S) can be used to probe the spin fluctuations (SFs) in proximity to the quantum critical point (QCP) in Fe-based superconductors. The sensitivity of S to the entropy of charge carriers allows us to observe an increase of S/T in Ba(Fe1−xCox)2As2 close to the spin-density-wave (SDW) QCP. This behavior is due to the coupling of low-energy conduction electrons to two-dimensional SFs, similar to heavy-fermion systems. The low-temperature enhancement of S/T in the Co substitution range 0.02
Copyright Owner
American Physical Society
Copyright Date
2013
Language
en
File Format
application/pdf
Recommended Citation
Arsenijevic, S.; Hodovanets, H.; Gaal, R.; Forro, L.; Bud’ko, Sergey L.; and Canfield, Paul C., "Signatures of quantum criticality in the thermopower of Ba(Fe1-xCox)(2)As-2" (2013). Physics and Astronomy Publications. 605.
https://lib.dr.iastate.edu/physastro_pubs/605
Comments
This article is published as Arsenijević, S., H. Hodovanets, R. Gaál, L. Forró, S. L. Bud'Ko, and P. C. Canfield. "Signatures of quantum criticality in the thermopower of Ba (Fe 1− x Co x) 2 As 2." Physical Review B 87, no. 22 (2013): 224508. DOI: 10.1103/PhysRevB.87.224508. Posted with permission.