Cargando…

Spin–phonon coupling and magnetic relaxation in single-molecule magnets

Electron–phonon coupling is important in many physical phenomena, e.g. photosynthesis, catalysis and quantum information processing, but its impacts are difficult to grasp on the microscopic level. One area attracting wide interest is that of single-molecule magnets, which is motivated by searching...

Descripción completa

Detalles Bibliográficos
Autores principales: Kragskow, Jon G. C., Mattioni, Andrea, Staab, Jakob K., Reta, Daniel, Skelton, Jonathan M., Chilton, Nicholas F.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10351214/
https://www.ncbi.nlm.nih.gov/pubmed/37377351
http://dx.doi.org/10.1039/d2cs00705c
_version_ 1785074300630335488
author Kragskow, Jon G. C.
Mattioni, Andrea
Staab, Jakob K.
Reta, Daniel
Skelton, Jonathan M.
Chilton, Nicholas F.
author_facet Kragskow, Jon G. C.
Mattioni, Andrea
Staab, Jakob K.
Reta, Daniel
Skelton, Jonathan M.
Chilton, Nicholas F.
author_sort Kragskow, Jon G. C.
collection PubMed
description Electron–phonon coupling is important in many physical phenomena, e.g. photosynthesis, catalysis and quantum information processing, but its impacts are difficult to grasp on the microscopic level. One area attracting wide interest is that of single-molecule magnets, which is motivated by searching for the ultimate limit in the miniaturisation of binary data storage media. The utility of a molecule to store magnetic information is quantified by the timescale of its magnetic reversal processes, also known as magnetic relaxation, which is limited by spin–phonon coupling. Several recent accomplishments of synthetic organometallic chemistry have led to the observation of molecular magnetic memory effects at temperatures above that of liquid nitrogen. These discoveries have highlighted how far chemical design strategies for maximising magnetic anisotropy have come, but have also highlighted the need to characterise the complex interplay between phonons and molecular spin states. The crucial step is to make a link between magnetic relaxation and chemical motifs, and so be able to produce design criteria to extend molecular magnetic memory. The basic physics associated with spin–phonon coupling and magnetic relaxation was outlined in the early 20th century using perturbation theory, and has more recently been recast in the form of a general open quantum systems formalism and tackled with different levels of approximations. It is the purpose of this Tutorial Review to introduce the topics of phonons, molecular spin–phonon coupling, and magnetic relaxation, and to outline the relevant theories in connection with both the traditional perturbative texts and the more modern open quantum systems methods.
format Online
Article
Text
id pubmed-10351214
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher The Royal Society of Chemistry
record_format MEDLINE/PubMed
spelling pubmed-103512142023-07-18 Spin–phonon coupling and magnetic relaxation in single-molecule magnets Kragskow, Jon G. C. Mattioni, Andrea Staab, Jakob K. Reta, Daniel Skelton, Jonathan M. Chilton, Nicholas F. Chem Soc Rev Chemistry Electron–phonon coupling is important in many physical phenomena, e.g. photosynthesis, catalysis and quantum information processing, but its impacts are difficult to grasp on the microscopic level. One area attracting wide interest is that of single-molecule magnets, which is motivated by searching for the ultimate limit in the miniaturisation of binary data storage media. The utility of a molecule to store magnetic information is quantified by the timescale of its magnetic reversal processes, also known as magnetic relaxation, which is limited by spin–phonon coupling. Several recent accomplishments of synthetic organometallic chemistry have led to the observation of molecular magnetic memory effects at temperatures above that of liquid nitrogen. These discoveries have highlighted how far chemical design strategies for maximising magnetic anisotropy have come, but have also highlighted the need to characterise the complex interplay between phonons and molecular spin states. The crucial step is to make a link between magnetic relaxation and chemical motifs, and so be able to produce design criteria to extend molecular magnetic memory. The basic physics associated with spin–phonon coupling and magnetic relaxation was outlined in the early 20th century using perturbation theory, and has more recently been recast in the form of a general open quantum systems formalism and tackled with different levels of approximations. It is the purpose of this Tutorial Review to introduce the topics of phonons, molecular spin–phonon coupling, and magnetic relaxation, and to outline the relevant theories in connection with both the traditional perturbative texts and the more modern open quantum systems methods. The Royal Society of Chemistry 2023-06-28 /pmc/articles/PMC10351214/ /pubmed/37377351 http://dx.doi.org/10.1039/d2cs00705c Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Kragskow, Jon G. C.
Mattioni, Andrea
Staab, Jakob K.
Reta, Daniel
Skelton, Jonathan M.
Chilton, Nicholas F.
Spin–phonon coupling and magnetic relaxation in single-molecule magnets
title Spin–phonon coupling and magnetic relaxation in single-molecule magnets
title_full Spin–phonon coupling and magnetic relaxation in single-molecule magnets
title_fullStr Spin–phonon coupling and magnetic relaxation in single-molecule magnets
title_full_unstemmed Spin–phonon coupling and magnetic relaxation in single-molecule magnets
title_short Spin–phonon coupling and magnetic relaxation in single-molecule magnets
title_sort spin–phonon coupling and magnetic relaxation in single-molecule magnets
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10351214/
https://www.ncbi.nlm.nih.gov/pubmed/37377351
http://dx.doi.org/10.1039/d2cs00705c
work_keys_str_mv AT kragskowjongc spinphononcouplingandmagneticrelaxationinsinglemoleculemagnets
AT mattioniandrea spinphononcouplingandmagneticrelaxationinsinglemoleculemagnets
AT staabjakobk spinphononcouplingandmagneticrelaxationinsinglemoleculemagnets
AT retadaniel spinphononcouplingandmagneticrelaxationinsinglemoleculemagnets
AT skeltonjonathanm spinphononcouplingandmagneticrelaxationinsinglemoleculemagnets
AT chiltonnicholasf spinphononcouplingandmagneticrelaxationinsinglemoleculemagnets