Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Chern numbers for spin models of transition metal nanomagnets

Canali, CM ; Cehovin, Aleksander LU and MacDonald, AH (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:
author
; and
organization
publishing date
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
2025-10-14 09:25:29
@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}},
}