Strong antiferromagnetic proximity coupling in the heterostructure superconductor Sr2VO3FeAs
SCIE
SCOPUS
- Title
- Strong antiferromagnetic proximity coupling in the heterostructure superconductor Sr2VO3FeAs
- Authors
- Ok, Jong Mok; Kwon, Chang Il; Valenzuela, O. E. Ayala; Kim, Sunghun; McDonald, Ross D.; Kim, Jeehoon; Choi, E. S.; Kang, Woun; Jo, Y. J.; Kim, C.; Moon, E. G.; Kim, Y. K.; Kim, Jun Sung
- Date Issued
- 2022-06
- Publisher
- AMER PHYSICAL SOC
- Abstract
- We report the observation of strong magnetic proximity coupling in the heterostructure superconductor Sr2VO3-δFeAs, determined by upper critical field Hc2(T) measurements up to 65 T. Using the resistivity and the radio-frequency measurements for both H∥ab and H∥c, we found a strong upward curvature of Hc2c(T), together with a steep increase in Hc2ab(T) near Tc, yielding an anisotropic factor γH=Hc2ab/Hc2c up to ∼20, much higher than those of other iron-based superconductors. These are attributed to the Jaccarino-Peter effect, rather than to the multiband effect, due to strong exchange interaction between itinerant Fe spins of the FeAs layers and localized V spins of Mott-insulating SrVO3-δ layers. These findings provide evidence for strong antiferromagnetic proximity coupling that is comparable to the intralayer superexchange interaction of the SrVO3-δ layer and sufficient to induce magnetic frustration in Sr2VO3-δFeAs.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/116769
- DOI
- 10.1103/physrevb.105.214505
- ISSN
- 2469-9950
- Article Type
- Article
- Citation
- Physical Review b, vol. 105, no. 21, 2022-06
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.