Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/29617
Título: Torsion effects on condensed matter: like a magnetic field but not so much
Palavras-chave: Condensed matter - Torsion
Screw dislocations
Matéria Condensada - Torção
Data do documento: Fev-2017
Editor: Springer
Citação: LIMA, A. A.; FILGUEIRAS, C.; MORAES, F. Torsion effects on condensed matter: like a magnetic field but not so much. The European Physical Journal B, Les Ulis, v. 90, n. 2, p. 1-8, Feb. 2017.
Resumo: In this work, we study the effects of torsion due to a uniform distribution of topological defects (screw dislocations) on free spin/carrier dynamics in elastic solids. When a particle moves in such a medium, the effect of the torsion associated to the defect distribution is analogous to that of an applied magnetic field but with subtle differences. Analogue Landau levels are present in this system but they cannot be confined to two dimensions. In the case of spinless carriers, zero modes, which do not appear in the magnetic Landau levels, show up for quantized values of the linear momentum projected on the defects axis. Particles with spin are subjected to a Zeeman-like coupling between spin and torsion, which is insensitive to charge. This suggests the possibility of spin resonance experiments without a magnetic field for charged carriers or quasiparticles without electrical charge, like triplet excitons, for instance.
URI: https://link.springer.com/article/10.1140/epjb/e2017-70468-2
http://repositorio.ufla.br/jspui/handle/1/29617
Aparece nas coleções:DFI - Artigos publicados em periódicos

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