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Enhanced vortex pinning with possible antiferromagnetic order in FeSe under pressure
- Title
- Enhanced vortex pinning with possible antiferromagnetic order in FeSe under pressure
- Authors
- Kim J.-H.; Ok J.M.; Choi J.; Kang W.; Kim J.S.; Jo Y.
- Ewha Authors
- 강원
- SCOPUS Author ID
- 강원
- Issue Date
- 2022
- Journal Title
- Physical Review B
- ISSN
- 2469-9950
- Citation
- Physical Review B vol. 105, no. 3
- Publisher
- American Physical Society
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- The strong coupling between magnetic, structural, and electronic degrees of freedom is a prominent feature of Fe-based superconductors. However, the relationship between the degrees of freedom and vortex dynamics remains unclear. In this paper, we measure the vortex pinning energy U0/kB within the thermally activated flux-flow regime with respect to the pressure-induced phases in a FeSe single crystal. We show that the dependence of U0/kB on pressure, measured at a magnetic field higher than the crossover field Hcr, follows a trend like those of critical temperature Tc(p) and the average Fermi velocity v¯F(p). On the other hand, at magnetic fields lower than Hcr, U0/kB increases remarkably before reaching the pressure at which antiferromagnetic (AFM) long-range order occurs. Our results suggest the presence of additional pinning sites, possibly AFM domain boundaries, correlated with the enhanced U0/kB. In addition, in this paper, we provide a universal description of the vortex dynamics in FeSe. © 2022 American Physical Society.
- DOI
- 10.1103/PhysRevB.105.035133
- Appears in Collections:
- 자연과학대학 > 물리학전공 > Journal papers
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