ItemArticle

Magnetization induced skyrmion dynamics of a spin-orbit-coupled spinor condensate under sinusoidally varying magnetic field

Title
Magnetization induced skyrmion dynamics of a spin-orbit-coupled spinor condensate under sinusoidally varying magnetic field
Creator
Saboo, Arpana; Halder, Soumyadeep; Thudiyangal, Mithun; Majumder, Sonjoy
Description
We explore the spin texture dynamics of a harmonically trapped spin-1 BoseEinstein condensate with Rashba spinorbit coupling and ferromagnetic spin-exchange interactions under a sinusoidally varying magnetic field along the x-direction. This interplay yields an intrinsic spin texture in the ground state, forming a linear chain of alternating skyrmions at the saddle points of the magnetic field. Our study analyzes the spin-mixing dynamics for both a freely evolving and a controlled longitudinal magnetization. The spin-1 system exhibits the Einsteinde Haas effect for the first case, for which an exchange between the total orbital angular momentum and the spin angular momentum is observed, resulting in minimal oscillations about the initial position of the skyrmion chain. However, for the fixed magnetization dynamics, the skyrmion chain exhibits ample angular oscillations about the equilibrium position, with the temporary formation of new skyrmions to facilitate the oscillatory motion. For the case of fixed magnetization, this contrast now stems from the exchange between the canonical and spin-dependent contribution to the orbital angular momentum. The variation in canonical angular momentum is linked to the angular oscillations, while the spin-dependent angular momentum accounts for the creation or annihilation of skyrmions. We confirm the presence of scissors mode excitations in the spin texture due to the angular skyrmion oscillations. 2025 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft.
Source
New Journal of Physics;Volume;27;Issue;4;Article No.;43019;
Date
01-01-2025
Publisher
Institute of Physics
Subject
skyrmions; spin texture dynamics; spin-1 BECs; spin-orbit coupling; spin-spin correlation; spinor condensates
Coverage
Saboo A., Department of Physics, Indian Institute of Technology Kharagpur, West Bengal, Kharagpur, 721302, India; Halder S., Department of Physics, Indian Institute of Technology Kharagpur, West Bengal, Kharagpur, 721302, India; Thudiyangal M., Department of Physics and Electronics, Christ University, Karnataka, Bengaluru, 560029, India; Majumder S., Department of Physics, Indian Institute of Technology Kharagpur, West Bengal, Kharagpur, 721302, India
Rights
All Open Access; Gold Open Access; Green Open Access
Relation
ISSN: 13672630;
Format
online
Language
English
Type
Article

Citation

Saboo, Arpana; Halder, Soumyadeep; Thudiyangal, Mithun; Majumder, Sonjoy, “Magnetization induced skyrmion dynamics of a spin-orbit-coupled spinor condensate under sinusoidally varying magnetic field,” CHRIST (Deemed To Be University) Institutional Repository, accessed June 19, 2026, https://archives.christuniversity.in/items/show/22803.

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