Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/103055
Title: Probing the topology of the quantum analog of a classical skyrmion
Authors: Sotnikov, O. M.
Mazurenko, V. V.
Colbois, J.
Mila, F.
Katsnelson, M. I.
Stepanov, E. A.
Issue Date: 2021
Publisher: American Physical Society
Citation: Probing the topology of the quantum analog of a classical skyrmion / O. M. Sotnikov, V. V. Mazurenko, J. Colbois, et al. — DOI 10.1103/PhysRevB.103.L060404 // Physical Review B. — 2021. — Vol. 103. — Iss. 6. — L060404.
Abstract: In magnetism, skyrmions correspond to classical three-dimensional spin textures characterized by a topological invariant that keeps track of the winding of the magnetization in real space, a property that cannot be easily generalized to the quantum case since the orientation of a quantum spin is, in general, ill defined. Moreover, as we show, the quantum skyrmion state cannot be directly observed in modern experiments that probe the local magnetization of the system. However, we show that this novel quantum state can still be identified and fully characterized by a special local three-spin correlation function defined on neighboring lattice sites - the scalar chirality - which reduces to the classical topological invariant for large systems and which is shown to be nearly constant in the quantum skyrmion phase. © 2021 American Physical Society.
Keywords: MAGNETIZATION
SPIN FLUCTUATIONS
TEXTURES
TOPOLOGY
LATTICE SITES
LOCAL MAGNETIZATION
QUANTUM ANALOG
QUANTUM SPIN
QUANTUM STATE
SPIN CORRELATION FUNCTIONS
SPIN TEXTURES
TOPOLOGICAL INVARIANTS
QUANTUM THEORY
URI: http://hdl.handle.net/10995/103055
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85101970908
PURE ID: 21028592
117bfc21-cb04-453a-8993-a5c07beb70ec
ISSN: 24699950
DOI: 10.1103/PhysRevB.103.L060404
metadata.dc.description.sponsorship: Acknowledgments. We thank S. Brener for interesting discussions. The work of V.V.M., O.M.S., and E.A.S. was supported by Russian Science Foundation Grant No. 18-12-00185. The work of J.C. and F.M. is supported by the Swiss National Science Foundation. The work of M.I.K. is supported by the European Research Council via Synergy Grant No. 854843 - FASTCORR.
RSCF project card: 18-12-00185
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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