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Absence of Spontaneous Magnetic Order of Lattice Spins Coupled to Itinerant Interacting Electrons in One and Two Dimensions
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 2841457
Author(s) Loss, Daniel; Pedrocchi, Fabio L.; Leggett, Anthony J.
Author(s) at UniBasel Loss, Daniel
Year 2011
Title Absence of Spontaneous Magnetic Order of Lattice Spins Coupled to Itinerant Interacting Electrons in One and Two Dimensions
Journal Physical Review Letters
Volume 107
Number 10
Pages / Article-Number 107201
Abstract We extend the Mermin-Wagner theorem to a system of lattice spins which are spin coupled to itinerant and interacting charge carriers. We use the Bogoliubov inequality to rigorously prove that neither (anti-) ferromagnetic nor helical long-range order is possible in one and two dimensions at any finite temperature. Our proof applies to a wide class of models including any form of electron-electron and single-electron interactions that are independent of spin. In the presence of Rashba or Dresselhaus spin-orbit interactions (SOI) magnetic order is not excluded and intimately connected to equilibrium spin currents. However, in the special case when Rashba and Dresselhaus SOIs are tuned to be equal, magnetic order is excluded again. This opens up a new possibility to control magnetism electrically.
Publisher American Physical Society
ISSN/ISBN 0031-9007 ; 1079-7114
URL https://link.aps.org/accepted/10.1103/PhysRevLett.107.107201
edoc-URL http://edoc.unibas.ch/dok/A6348235
Full Text on edoc No
Digital Object Identifier DOI 10.1103/PhysRevLett.107.107201
PubMed ID http://www.ncbi.nlm.nih.gov/pubmed/21981522
ISI-Number WOS:000294406600012
Document type (ISI) Journal Article
 
   

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