Triplet character of 2D-fermion dimers arising from s-wave attraction via spin-orbit coupling and Zeeman splitting

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dc.citation.issue5
dc.citation.volume12
dc.contributor.authorEbling U
dc.contributor.authorZulicke U
dc.contributor.authorBrand J
dc.date.accessioned2024-08-05T03:10:57Z
dc.date.available2024-08-05T03:10:57Z
dc.date.issued2022-05-19
dc.description.abstractWe theoretically study spin-1=2 fermions confined to two spatial dimensions and experiencing isotropic short-range attraction in the presence of both spin-orbit coupling and Zeeman spin splitting - a prototypical system for developing topological superfluidity in the many-body sector. Exact solutions for two-particle bound states are found to have a triplet contribution that dominates over the singlet part in an extended region of parameter space where the combined Zeeman- and center-of-mass-motion-induced spin-splitting energy is large. The triplet character of dimers is purest in the regime of weak s-wave interaction strength. Center-of-mass momentum is one of the parameters determining the existence of bound states, which we map out for both two- and onedimensional types of spin-orbit coupling. Distinctive features emerging in the orbital part of the bound-state wave function, including but not limited to its p-wave character, provide observable signatures of unconventional pairing.
dc.description.confidentialfalse
dc.identifier.citationEbling U, Zulicke U, Brand J. (2022). Triplet character of 2D-fermion dimers arising from s-wave attraction via spin-orbit coupling and Zeeman splitting. SciPost Physics. 12. 5.
dc.identifier.doi10.21468/SciPostPhys.12.5.167
dc.identifier.eissn2542-4653
dc.identifier.elements-typejournal-article
dc.identifier.number167
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/71201
dc.languageEnglish
dc.publisherSciPost Foundation
dc.publisher.urihttps://scipost.org/10.21468/SciPostPhys.12.5.167
dc.relation.isPartOfSciPost Physics
dc.rights(c) 2023 The Author/s
dc.rightsCC BY 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleTriplet character of 2D-fermion dimers arising from s-wave attraction via spin-orbit coupling and Zeeman splitting
dc.typeJournal article
pubs.elements-id455685
pubs.organisational-groupCollege of Health
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