Accounting for quantum effects in atomistic spin dynamics
dc.contributor.author | Berritta, M | |
dc.contributor.author | Scali, S | |
dc.contributor.author | Cerisola, F | |
dc.contributor.author | Anders, J | |
dc.date.accessioned | 2024-05-17T10:36:07Z | |
dc.date.issued | 2024-05-30 | |
dc.date.updated | 2024-05-17T10:10:24Z | |
dc.description.abstract | Atomistic spin dynamics (ASD) is a standard tool to model the magnetization dynamics of a variety of materials. The fundamental dynamical model underlying ASD is entirely classical. In this paper, we present two approaches to effectively incorporate quantum effects into ASD simulations, thus enhancing their low temperature predictions. The first allows to simulate the magnetic behavior of a quantum spin system by solving the equations of motion of a classical spin system at an effective temperature relative to the critical temperature. This effective temperature is determined a priori from the microscopic properties of the system. The second approach is based on a semi-classical model where classical spins interact with an environment with a quantum–like power spectrum. The parameters that characterize this model can be calculated ab initio or extracted from experiments. This semi-classical model quantitatively reproduces the absolute temperature behavior of a magnetic system, thus accounting for the quantum mechanical aspects of its dynamics, even at low temperature. The methods presented here can be readily implemented in current ASD simulations with no additional complexity cost. | en_GB |
dc.description.sponsorship | Engineering and Physical Sciences Research Council (EPSRC) | en_GB |
dc.description.sponsorship | Foundational Questions Institute Fund | en_GB |
dc.description.sponsorship | Royal Society | en_GB |
dc.identifier.citation | Vol. 109, article 174441 | en_GB |
dc.identifier.doi | 10.1103/PhysRevB.109.174441 | |
dc.identifier.grantnumber | EP/R045577/1 | en_GB |
dc.identifier.grantnumber | EP/R513210/1 | en_GB |
dc.identifier.grantnumber | FQXi-IAF19-01 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10871/135965 | |
dc.identifier | ORCID: 0000-0002-9791-0363 (Anders, Janet) | |
dc.language.iso | en_US | en_GB |
dc.publisher | American Physical Society | en_GB |
dc.rights | © 2024. Open access. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. | |
dc.title | Accounting for quantum effects in atomistic spin dynamics | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2024-05-17T10:36:07Z | |
dc.identifier.issn | 1098-0121 | |
dc.description | This is the final version. Available on open access from the American Physical Society via the DOI in this record | en_GB |
dc.identifier.eissn | 1550-235X | |
dc.identifier.journal | Physical Review B (condensed matter and materials physics) | en_GB |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | en_GB |
dcterms.dateAccepted | 2024-05-13 | |
dcterms.dateSubmitted | 2024-05-04 | |
rioxxterms.version | VoR | en_GB |
rioxxterms.licenseref.startdate | 2024-05-13 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2024-05-17T10:10:27Z | |
refterms.versionFCD | AM | |
refterms.dateFOA | 2024-06-03T15:31:38Z | |
refterms.panel | B | en_GB |
exeter.rights-retention-statement | Yes |
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