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Title: Skyrmion helicity: quantization and quantum tunneling effects
Authors: Psaroudaki, Christina
Panagopoulos, Christos
Keywords: Science::Physics
Issue Date: 2022
Source: Psaroudaki, C. & Panagopoulos, C. (2022). Skyrmion helicity: quantization and quantum tunneling effects. Physical Review B, 106(10), 104422-.
Project: NRF-CRP21-2018-0001 
Journal: Physical Review B 
Abstract: We derive the quantization of magnetic helicity in the solid-state and demonstrate tunable macroscopic quantum tunneling, coherence, and oscillation for a skyrmion spin texture stabilized in frustrated magnets. We also discuss the parameter space for the experimental realization of quantum effects. Typically, for a skyrmion of 5 nm radius, quantum tunneling between two macroscopic states with distinct helicities occurs with an inverse escape rate within seconds below 100 mK, and an energy splitting in the MHz regime. Feasibility of quantum tunneling of an ensemble of magnetic spins inspires new platforms for quantum operations utilizing topologically protected chiral spin configurations.
ISSN: 1098-0121
DOI: 10.1103/PhysRevB.106.104422
Schools: School of Physical and Mathematical Sciences 
Rights: © 2022 American Physical Society. All rights reserved. This paper was published in Physical Review B and is made available with permission of American Physical Society.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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