Universität zu Köln

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

Full text not available from this repository.

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:	Creators Email ORCID ORCID Put Code Choi, Wonjune UNSPECIFIED UNSPECIFIED UNSPECIFIED Klein, Philipp W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rosch, Achim UNSPECIFIED orcid.org/0000-0002-6586-5721 UNSPECIFIED Kim, Yong Baek UNSPECIFIED UNSPECIFIED UNSPECIFIED
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:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute for Theoretical Physics
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CORRELATED SYSTEMS; SPIN LIQUIDS; GUTZWILLER; PHYSICS; LATTICE Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/16939