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Title: Quantum collapse of a magnetic skyrmion

Abstract

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:
Research Org.:
City Univ. (CUNY), NY (United States). Herbert H. Lehman College and Graduate School; City Univ. of New York (CUNY), NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1461469
Alternate Identifier(s):
OSTI ID: 1461601; OSTI ID: 1593709
Grant/Contract Number:  
FG02-93ER45487
Resource 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)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; skyrmion, quantum collapse, tunneling rate

Citation Formats

Derras-Chouk, Amel, Chudnovsky, Eugene M., and Garanin, Dmitry A. Quantum collapse of a magnetic skyrmion. United States: N. p., 2018. Web. doi:10.1103/PhysRevB.98.024423.
Derras-Chouk, Amel, Chudnovsky, Eugene M., & Garanin, Dmitry A. Quantum collapse of a magnetic skyrmion. United States. doi:10.1103/PhysRevB.98.024423.
Derras-Chouk, Amel, Chudnovsky, Eugene M., and Garanin, Dmitry A. Wed . "Quantum collapse of a magnetic skyrmion". United States. doi:10.1103/PhysRevB.98.024423. https://www.osti.gov/servlets/purl/1461469.
@article{osti_1461469,
title = {Quantum collapse of a magnetic skyrmion},
author = {Derras-Chouk, Amel and Chudnovsky, Eugene M. and Garanin, Dmitry A.},
abstractNote = {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.},
doi = {10.1103/PhysRevB.98.024423},
journal = {Physical Review B},
number = 2,
volume = 98,
place = {United States},
year = {2018},
month = {7}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 3 works
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Figures / Tables:

Figure 1 Figure 1: Spin-field of the Bloch-type (upper panel) and the Néel-type (lower panel) BP skyrmions with Q = 1.

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.