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Weak-coupling superconductivity in an anisotropic three-dimensional repulsive Hubbard model

Abstract:
We study a three-dimensional single-band repulsive Hubbard model at weak coupling. We establish the superconducting phase diagram in the parameter space of the chemical potential and the out-of-plane hopping strength. The model continuously connects the Hubbard model in two and three dimensions. We confirm previously established results in these limits, and identify a rich structure of competing order parameters in between. Specifically, we find five types of p- and d-wave orders. In several regions of the phase diagram, even when the Fermi surface is a corrugated cylinder, the ground state is a time-reversal-symmetry-breaking superconductor with nodes, i.e., a Weyl superconductor.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1103/PhysRevB.98.224515

Authors


More by this author
Institution:
University of Oxford
Division:
MPLS Division
Department:
Physics
Sub department:
Theoretical Physics
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS Division
Department:
Physics
Sub department:
Theoretical Physics
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Theoretical Physics
Oxford college:
Somerville College
Role:
Author


Publisher:
American Physical Society
Journal:
Physical Review B More from this journal
Volume:
98
Issue:
22
Article number:
224515
Publication date:
2018-12-28
Acceptance date:
2018-12-18
DOI:
EISSN:
2469-9969
ISSN:
2469-9950


Pubs id:
pubs:953176
UUID:
uuid:f459eee6-e319-49a4-9110-39b37a9d1a5d
Local pid:
pubs:953176
Source identifiers:
953176
Deposit date:
2018-12-18

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