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 T 0 ~ 155 K of Sr2VO3FeAs, a naturally assembled heterostructure of an FeSC and a Mott-insulating 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 C 4 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.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Ok JM,Baek SH,Hoch C,Kremer RK,Park SY,Ji S,Büchner B,Park JH,Hyun SI,Shim JH,Bang Y,Moon EG,Mazin II,Kim JSdoi
10.1038/s41467-017-02327-0subject
Has Abstractpub_date
2017-12-18 00:00:00pages
2167issue
1issn
2041-1723pii
10.1038/s41467-017-02327-0journal_volume
8pub_type
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