Chern numbers for spin models of transition metal nanomagnets
(2003) In Physical Review Letters 91(4: 046805).- Abstract
- We argue that ferromagnetic transition metal nanoparticles with fewer than approximately 100 atoms can be described by an effective Hamiltonian with a single giant spin degree of freedom. The total spin S of the effective Hamiltonian is specified by a Berry curvature Chern number that characterizes the topologically nontrivial dependence of a nanoparticle's many-electron wave function on magnetization orientation. The Berry curvatures and associated Chern numbers have a complex dependence on spin-orbit coupling in the nanoparticle and influence the semiclassical Landau-Liftshitz equations that describe magnetization-orientation dynamics.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/305160
- author
- Canali, CM ; Cehovin, Aleksander LU and MacDonald, AH
- organization
- publishing date
- 2003
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review Letters
- volume
- 91
- issue
- 4: 046805
- publisher
- American Physical Society
- external identifiers
-
- wos:000184372300042
- scopus:0041379835
- ISSN
- 1079-7114
- DOI
- 10.1103/PhysRevLett.91.046805
- language
- English
- LU publication?
- yes
- id
- cac4ae55-8788-4119-ab1d-79a4905704d0 (old id 305160)
- date added to LUP
- 2016-04-01 11:42:07
- date last changed
- 2022-01-26 08:56:06
@article{cac4ae55-8788-4119-ab1d-79a4905704d0, abstract = {{We argue that ferromagnetic transition metal nanoparticles with fewer than approximately 100 atoms can be described by an effective Hamiltonian with a single giant spin degree of freedom. The total spin S of the effective Hamiltonian is specified by a Berry curvature Chern number that characterizes the topologically nontrivial dependence of a nanoparticle's many-electron wave function on magnetization orientation. The Berry curvatures and associated Chern numbers have a complex dependence on spin-orbit coupling in the nanoparticle and influence the semiclassical Landau-Liftshitz equations that describe magnetization-orientation dynamics.}}, author = {{Canali, CM and Cehovin, Aleksander and MacDonald, AH}}, issn = {{1079-7114}}, language = {{eng}}, number = {{4: 046805}}, publisher = {{American Physical Society}}, series = {{Physical Review Letters}}, title = {{Chern numbers for spin models of transition metal nanomagnets}}, url = {{http://dx.doi.org/10.1103/PhysRevLett.91.046805}}, doi = {{10.1103/PhysRevLett.91.046805}}, volume = {{91}}, year = {{2003}}, }