We describe the dynamics of a transverse spin-helix state—a product state with spatially rotating magnetization—under XXZ spin chain evolution. Due to experimental relevance we especially focus on magnetization dynamics. At long times the $U$(1) symmetry of the Hamiltonian is restored, leading to the decay of transverse magnetization, which can be described as an exponential decay of a spatially harmonic profile. We show that the dependence of the short- and intermediate-time decay timescale, which in principle depends on all different parameters, like the wave vector of the initial helix, the anisotropy, etc., can be described well by a single scaling function. We also briefly discuss the evolution of magnetization current.
| Language: | English |
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| Keywords: | statistical physics, condensed matter physics, spin chains, helicoidal magnetic texture, spin dynamics, 1-dimensional spin chains, quantum spin models, Heisenberg model, thermodynamics, condensed matter, materials, applied physics |
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| Work type: | Article |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FMF - Faculty of Mathematics and Physics
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| Publication status: | Published |
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| Publication version: | Author Accepted Manuscript |
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| Year: | 2023 |
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| Number of pages: | 14 str. |
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| Numbering: | Vol. 107, iss. 23, art. 235408 |
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| PID: | 20.500.12556/RUL-155057  |
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| UDC: | 536.93 |
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| ISSN on article: | 2469-9950 |
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| DOI: | 10.1103/PhysRevB.107.235408 |
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| COBISS.SI-ID: | 188718851 |
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| Publication date in RUL: | 18.03.2024 |
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| Views: | 1044 |
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| Downloads: | 467 |
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