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원자제어 저차원 전자계 연구단
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Unique Crystal Structure of Ca2RuO4 in the Current Stabilized Semimetallic State

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Title
Unique Crystal Structure of Ca2RuO4 in the Current Stabilized Semimetallic State
Author(s)
Bertinshaw, J; Gurung, N; Jorba, P; Liu, H; Schmid, M; Mantadakis, DT; Daghofer, M; Krautloher, M; Jain, A; Ryu, GH; Fabelo, O; Hansmann, P; Khaliullin, G; Pfleiderer, C; Keimer, B; B. J. Kim
Publication Date
2019-09
Journal
PHYSICAL REVIEW LETTERS, v.123, no.13, pp.137204 -
Publisher
AMER PHYSICAL SOC
Abstract
© 2019 American Physical Society. The electric-current stabilized semimetallic state in the quasi-two-dimensional Mott insulator Ca2RuO4 exhibits an exceptionally strong diamagnetism. Through a comprehensive study using neutron and x-ray diffraction, we show that this nonequilibrium phase assumes a crystal structure distinct from those of equilibrium metallic phases realized in the ruthenates by chemical doping, high pressure, and epitaxial strain, which in turn leads to a distinct electronic band structure. Dynamical mean field theory calculations based on the crystallographically refined atomic coordinates and realistic Coulomb repulsion parameters indicate a semimetallic state with partially gapped Fermi surface. Our neutron diffraction data show that the nonequilibrium behavior is homogeneous, with antiferromagnetic long-range order completely suppressed. These results provide a new basis for theoretical work on the origin of the unusual nonequilibrium diamagnetism in Ca2RuO4.
URI
https://pr.ibs.re.kr/handle/8788114/6424
ISSN
0031-9007
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > Journal Papers (저널논문)
Files in This Item:
2019_PRL_김범준(교신)Unique Crystal Structure of Ca2RuO4 in the Current Stabilized Semimetallic State.pdfDownload

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