Frustration-driven C-4 symmetric order in a naturally-heterostructured superconductor Sr2VO3FeAs
SCIE
SCOPUS
- Title
- Frustration-driven C-4 symmetric order in a naturally-heterostructured superconductor Sr2VO3FeAs
- Authors
- Jong Mok Ok; S.-H. Baek; C. Hoch; R.K. Kremer; S.Y. Park; Sungdae Ji; B. Büchner; PARK, JAE HOON; HYUN, SEUNG ILL; Ji hoon Shim; BANG, YUNKYU; E.G. Moon; I.I. Mazin; Jun Sung Kim
- Date Issued
- 2017-12
- Publisher
- NATURE PUBLISHING GROUP
- Abstract
- A subtle balance between competing interactions in iron-based superconductors (FeSCs) can
be tipped by additional interfacial interactions in a heterostructure, often inducing exotic
phases with unprecedented properties. Particularly when the proximity-coupled layer is
magnetically active, rich phase diagrams are expected in FeSCs, but this has not been
explored yet. Here, using high-accuracy 75As and 51V nuclear magnetic resonance measurements,
we investigate an electronic phase that emerges in the FeAs layer below
T0 ~ 155 K of Sr2VO3FeAs, a naturally assembled heterostructure of an FeSC and a Mottinsulating
vanadium oxide. We find that frustration of the otherwise dominant Fe stripe and V
Neel fluctuations via interfacial coupling induces a charge/orbital order in the FeAs layers,
without either static magnetism or broken C4 symmetry, while suppressing the Neel antiferromagnetism
in the SrVO3 layers. These findings demonstrate that the magnetic proximity
coupling stabilizes a hidden order in FeSCs, which may also apply to other strongly correlated
heterostructures.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/41044
- DOI
- 10.1038/s41467-017-02327-0
- ISSN
- 2041-1723
- Article Type
- Article
- Citation
- Nature Communications, vol. 8, no. 2167, page. 1 - 7, 2017-12
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