Detection of topological transitions by transport through molecules and nanodevices
The phase transitions of an interacting electronic system weakly coupled to free-electron which results by zero-bias conditions, were investigated. The phase transitions were expressed in terms of two effective impurity models for cases with and without spin degeneracy. The weight of first conductan...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2004 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/69909 |
| Acceso en línea: | http://hdl.handle.net/11336/69909 |
| Access Level: | acceso abierto |
| Palabra clave: | TOPOLOGICAL TRANSITIONS https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| Sumario: | The phase transitions of an interacting electronic system weakly coupled to free-electron which results by zero-bias conditions, were investigated. The phase transitions were expressed in terms of two effective impurity models for cases with and without spin degeneracy. The weight of first conductance peak as a function of external flux or of difference in gate voltages between even and odd sites allows to identify topological charge transition was also demonstrated using half-filled ionic Hubbard ring. The results show that conductance is expressed in terms of spectral density of an EAM, which illustrates breaking of the Kondo effect by an applied field. |
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