Quantum collapse of a magnetic skyrmion

Derras-Chouk, Amel; Chudnovsky, Eugene M.; Garanin, Dmitry A.

doi:10.1103/PhysRevB.98.024423

Title: Quantum collapse of a magnetic skyrmion

Journal Article · Wed Jul 25 00:00:00 EDT 2018 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.98.024423· OSTI ID:1461469

Derras-Chouk, Amel ^[1]; Chudnovsky, Eugene M. ^[1]; Garanin, Dmitry A. ^[1]

City Univ. (CUNY), NY (United States). Herbert H. Lehman College and Graduate School, Physics Dept.

Quantum collapse of a small skyrmion in a thin magnetic film with Dzyaloshinskii-Moriya (DMI) interaction has been studied. The energy of the skyrmion and the stability threshold determined by the DMI, the external magnetic field, and the underlying atomic lattice are investigated analytically and numerically. The Lagrangian describing the coupled dynamics of the skyrmion size and the chirality angle is derived. Equations of motion possess an instanton solution that corresponds to the skyrmion underbarrier contraction via quantum tunneling with subsequent collapse and decay of the topological charge. The tunneling rate is computed and the conditions needed to observe quantum collapse of a skyrmion in a magnetic film are discussed.

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Research Organization:: City Univ. (CUNY), NY (United States). Herbert H. Lehman College and Graduate School; City Univ. of New York (CUNY), NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: FG02-93ER45487

OSTI ID:: 1461469

Alternate ID(s):: OSTI ID: 1461601; OSTI ID: 1593709

Journal Information:: Physical Review B, Vol. 98, Issue 2; Related Information: Physical Review B Article - Editor's Suggestion; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 28 works

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