Strong antiferromagnetic proximity coupling in the heterostructure superconductor Sr2VO3−δFeAs
Jong Mok Ok, Chang Il Kwon, O. E. Ayala Valenzuela, Sunghun Kim, Ross D. McDonald, Jeehoon Kim, E. S. Choi, Woun Kang, Y. J. Jo, C. Kim, E. G. Moon, Y. K. Kim, Jun Sung Kim
DOI 10.1103/PhysRevB.105.214505 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Sr2VO3-δFeAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 27 | Pressure not reported | onset |
| Sr2VO3-δFeAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 35 | Pressure not reported | onset |
Similar papers
Correlation of Fe-Based Superconductivity and Electron-Phonon Coupling in an FeAs/Oxide Heterostructure
similarity 0.95Seokhwan Choi et al.
Source status unknown — claims are unverified
Pressure dependence of the superconducting and magnetic transition temperatures in Sr2VO3FeAs
similarity 0.95S. Holenstein et al.
Source status unknown — claims are unverified
Magnetism and superconductivity in Sr2VFeAsO3 revealed by 75As- and 51V-NMR under elevated pressures
similarity 0.94Keiji Ueshima et al.
Source status unknown — claims are unverified
Switching Magnetism and Superconductivity with Spin-Polarized Current in Iron-Based Superconductor
similarity 0.94Seokhwan Choi et al.
Source status unknown — claims are unverified
Weak magnetism and the Mott state of vanadium in superconducting Sr2VO3FeAs
similarity 0.94Franziska Hummel et al.
Source status unknown — claims are unverified
Strong antiferromagnetic proximity coupling in a heterostructured superconductor SrVOFeAs
similarity 0.93Jong Mok Ok et al. · 2020 · arXiv:2010.01752
Source status unknown — claims are unverified