Unique Crystal Structure of Ca2RuO4 in the Current Stabilized Semimetallic State
SCIE
SCOPUS
- Title
- Unique Crystal Structure of Ca2RuO4 in the Current Stabilized Semimetallic State
- Authors
- KIM, BUMJOON; Bertinshaw, Joel; Gurung, Namrata; Jorba, P; Liu, H; Schmid, M.; Mantadakis, D. T.; Daghofer, M.; Krautloher, M.; Jain, A.; Ryu, G. H.; Fabelo, O.; Hansmann, P.; Khaliullin, G.; Pfleiderer, G.; Keimer, B.
- Date Issued
- 2019-09
- Publisher
- American Physical Society
- Abstract
- 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://oasis.postech.ac.kr/handle/2014.oak/99795
- DOI
- 10.1103/PhysRevLett.123.137204
- ISSN
- 0031-9007
- Article Type
- Article
- Citation
- Physical Review Letters, vol. 123, no. 13, page. 137204, 2019-09
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- There are no files associated with this item.
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