Choi, Wonjune, Klein, Philipp W., Rosch, Achim ORCID: 0000-0002-6586-5721 and Kim, Yong Baek (2018). Topological superconductivity in the Kondo-Kitaev model. Phys. Rev. B, 98 (15). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

We investigate possible topological superconductivity in the Kondo-Kitaev model on the honeycomb lattice, where the Kitaev spin liquid is coupled to conduction electrons via the Kondo coupling. We use the self-consistent Abrikosov-fermion mean-field theory to map out the phase diagram. Upon increasing the Kondo coupling, a first-order transition occurs from the decoupled phase of spin liquid and conduction electrons to a ferromagnetic topological superconductor of Class D with a single chiral Majorana edge mode. This is followed by a second-order transition into a paramagnetic topological superconductor of Class DIII with a single pair of helical Majorana edge modes. These findings offer a route to topological superconductivity in the Kondo lattice system. We discuss the connection between topological nature of the Kitaev spin liquid and topological superconductors obtained in this model.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Choi, WonjuneUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Klein, Philipp W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rosch, AchimUNSPECIFIEDorcid.org/0000-0002-6586-5721UNSPECIFIED
Kim, Yong BaekUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-169394
DOI: 10.1103/PhysRevB.98.155123
Journal or Publication Title: Phys. Rev. B
Volume: 98
Number: 15
Date: 2018
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 2469-9969
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
CORRELATED SYSTEMS; SPIN LIQUIDS; GUTZWILLER; PHYSICS; LATTICEMultiple languages
Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed MatterMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/16939

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