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  Unique Crystal Structure of Ca2RuO4 in the Current Stabilized Semimetallic State

Bertinshaw, J., Gurung, N., Jorba, P., Liu, H., Schmid, M., Mantadakis, D. T., et al. (2019). Unique Crystal Structure of Ca2RuO4 in the Current Stabilized Semimetallic State. Physical Review Letters, 123(13): 137204, pp. 1-6. doi:10.1103/PhysRevLett.123.137204.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-1BA3-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-1BA5-3
Genre: Journal Article

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 Creators:
Bertinshaw, J.1, Author
Gurung, N.1, Author
Jorba, P.1, Author
Liu, H.1, Author
Schmid, M.1, Author
Mantadakis, D. T.1, Author
Daghofer, M.1, Author
Krautloher, M.1, Author
Jain, A.1, Author
Ryu, G. H.1, Author
Fabelo, O.1, Author
Hansmann, P.2, Author              
Khaliullin, G.1, Author
Pfleiderer, C.1, Author
Keimer, B.1, Author
Kim, B. J.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              

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 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.

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Language(s): eng - English
 Dates: 2019-09-272019-09-27
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 123 (13) Sequence Number: 137204 Start / End Page: 1 - 6 Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1