Psaroudaki, Christina and Hoffman, Silas and Klinovaja, Jelena and Loss, Daniel. (2017) Quantum Dynamics of Skyrmions in Chiral Magnets. Physical Review X, 7 (4). 041045.
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Official URL: https://edoc.unibas.ch/60919/
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Abstract
We study the quantum propagation of a Skyrmion in chiral magnetic insulators by generalizing the micromagnetic equations of motion to a finite-temperature path integral formalism, using field theoretic tools. Promoting the center of the Skyrmion to a dynamic quantity, the fluctuations around the Skyrmionic configuration give rise to a time-dependent damping of the Skyrmion motion. From the frequency dependence of the damping kernel, we are able to identify the Skyrmion mass, thus providing a microscopic description of the kinematic properties of Skyrmions. When defects are present or a magnetic trap is applied, the Skyrmion mass acquires a finite value proportional to the effective spin, even at vanishingly small temperature. We demonstrate that a Skyrmion in a confined geometry provided by a magnetic trap behaves as a massive particle owing to its quasi-one-dimensional confinement. An additional quantum mass term is predicted, independent of the effective spin, with an explicit temperature dependence which remains finite even at zero temperature.
Faculties and Departments: | 05 Faculty of Science > Departement Physik > Physik > Theoretical Nano/Quantum Physics (Klinovaja) |
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UniBasel Contributors: | Klinovaja, Jelena |
Item Type: | Article, refereed |
Article Subtype: | Research Article |
Publisher: | American Physical Society |
e-ISSN: | 2160-3308 |
Note: | Publication type according to Uni Basel Research Database: Journal article |
Language: | English |
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edoc DOI: | |
Last Modified: | 07 Mar 2018 14:00 |
Deposited On: | 07 Mar 2018 14:00 |
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