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This content will become publicly available on July 25, 2019

Title: Quantum collapse of a magnetic skyrmion

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.
Authors:
 [1] ;  [1] ;  [1]
  1. City Univ. (CUNY), NY (United States). Herbert H. Lehman College and Graduate School, Physics Dept.
Publication Date:
Grant/Contract Number:
FG02-93ER45487
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 98; Journal Issue: 2; Related Information: Physical Review B Article - Editor's Suggestion; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
City Univ. (CUNY), NY (United States). Herbert H. Lehman College and Graduate School
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1461469
Alternate Identifier(s):
OSTI ID: 1461601