Artículo
Spin-charge separation and topological phase transitions in Aharonov-Bohm rings of interacting electrons
Fecha de publicación:
07/2006
Editorial:
World Scientific
Revista:
International Journal of Modern Physics B
ISSN:
0217-9792
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We investigate the properties of strongly correlated electronic models on a flux-threaded ring connected to semi-infinite free-electron leads. The interference pattern of such an Aharonov-Bohm ring shows sharp dips at certain flux values, determined by the filling, which are a consequence of spin-charge separation in a nanoscopic system. The conductance through such a molecule or nanodevice is related directly to its spectroscopic properties, opening new experimental possibilities for probing the phenomenology of strongly interacting systems. As a further example, for a ring described by the half-filled ionic Hubbard model we show that the weight of the first conductance peak as a function of gate voltage or external flux allows one to identify the topological charge transition between a correlated insulator and a band insulator.
Palabras clave:
Aharonov-Bohm Ring
,
Spin-Charge Separation
,
Topological Phase Transition
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CCT - PATAGONIA NORTE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Citación
Normand, B.; Hallberg, Karen Astrid; Aligia, Armando Ángel; Kampf, A. P.; Spin-charge separation and topological phase transitions in Aharonov-Bohm rings of interacting electrons; World Scientific; International Journal of Modern Physics B; 20; 19; 7-2006; 2651-2655
Compartir
Altmétricas