Open AccessBand-selective gap opening by a C 4 -symmetric order in a proximity-coupled heterostructure Sr 2 VO 3 FeAs
Author(s) -
Sunghun Kim,
Jong Mok Ok,
Hanbit Oh,
Chang Il Kwon,
Yi Zhang,
Jonathan D. Denlinger,
SungKwan Mo,
F. Wolff-Fabris,
Erik Kampert,
Eun-Gook Moon,
Changyoung Kim,
Jun Sung Kim,
Yeongkwan Kim
Publication year - 2021
Publication title -
proceedings of the national academy of sciences of the united states of america
Language(s) - English
Resource type - Journals
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.2105190118
Subject(s) - condensed matter physics , superconductivity , angle resolved photoemission spectroscopy , cuprate , physics , photoemission spectroscopy , band gap , electronic structure , fermi level , heterojunction , electron , x ray photoelectron spectroscopy , nuclear magnetic resonance , quantum mechanics
Significance Heterostructures of correlated electronic systems offer versatile platforms for various types of quantum phases and their transitions. A common wisdom states that the proximity coupling between constituent layers plays a secondary role, because it is much weaker than the intralayer interactions. In this work, we present a counterexample of the belief. Namely, the proximity coupling between localized spins and itinerant electrons stabilizes an exotic electronic state with band-selective gap opening whose observation is done in a correlated heterostructure Sr2 VO3 FeAs. Our finding highlights that the proximity coupling can be an effective knob for exotic phases in correlated heterostructures.