Holes localized on a Skyrmion in a doped antiferromagnet on the honeycomb lattice: Symmetry analysis

Vlasii, Nadiia Dmytrivna; Hofmann, C.P.; Jiang, F.-J.; Wiese, Uwe-Jens (2014). Holes localized on a Skyrmion in a doped antiferromagnet on the honeycomb lattice: Symmetry analysis. Annals of physics, 354, pp. 213-243. Elsevier 10.1016/j.aop.2014.12.012

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Using the low-energy effective field theory for hole-doped antiferromagnets on the honeycomb lattice, we study the localization of holes on Skyrmions, as a potential mechanism for the preformation of Cooper pairs. In contrast to the square lattice case, for the standard radial profile of the Skyrmion on the honeycomb lattice, only holes residing in one of the two hole pockets can get localized. This differs qualitatively from hole pairs bound by magnon exchange, which is most attractive between holes residing in different momentum space pockets. On the honeycomb lattice, magnon exchange unambiguously leads to f-wave pairing, which is also observed experimentally. Using the collective-mode quantization of the Skyrmion, we determine the quantum numbers of the localized hole pairs. Again, f-wave symmetry is possible, but other competing pairing symmetries cannot be ruled out.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Vlasii, Nadiia Dmytrivna and Wiese, Uwe-Jens

Subjects:

500 Science > 530 Physics

ISSN:

0003-4916

Publisher:

Elsevier

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

29 Jan 2015 11:10

Last Modified:

26 Dec 2016 02:30

Publisher DOI:

10.1016/j.aop.2014.12.012

BORIS DOI:

10.7892/boris.62612

URI:

https://boris.unibe.ch/id/eprint/62612

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