Electric polarization near vortices in the extended Kitaev model

Autor: Lucas R. D. Freitas, Tim Bauer, Reinhold Egger, Rodrigo G. Pereira
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: npj Quantum Materials, Vol 9, Iss 1, Pp 1-11 (2024)
Druh dokumentu: article
ISSN: 2397-4648
21720045
DOI: 10.1038/s41535-024-00643-5
Popis: Abstract We formulate a Majorana mean-field theory for the extended J KΓ Kitaev model in a magnetic Zeeman field of arbitrary direction, and apply it for studying spatially inhomogeneous states harboring vortices. This mean-field theory is exact in the pure Kitaev limit and captures the essential physics throughout the Kitaev spin liquid phase. We determine the charge profile around vortices and the corresponding quadrupole tensor. The quadrupole-quadrupole interaction between distant vortices is shown to be either repulsive or attractive, depending on parameters. We predict that electrically biased scanning probe tips enable the creation of vortices at preselected positions. Our results paves the way for the electric manipulation of Ising anyons in Kitaev spin liquids.
Databáze: Directory of Open Access Journals
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