Transient effects in the backscattered current of a Luttinger liquid
We study the backscattered current in a Luttinger liquid in the presence of a pointlike weak impurity switched on at finite time, taking into account finite-temperature effects. We show how the well-known results for a static impurity are distorted. We derive a dimensionless parameter τ<sub>R&...
| Autores: | , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2010 |
| País: | Argentina |
| Recursos: | Universidad Nacional de La Plata |
| Repositorio: | SEDICI (UNLP) |
| Idioma: | inglés |
| OAI Identifier: | oai:sedici.unlp.edu.ar:10915/126081 |
| Acesso em linha: | http://sedici.unlp.edu.ar/handle/10915/126081 |
| Access Level: | acceso abierto |
| Palavra-chave: | Física Physics Current (mathematics) Voltage Luttinger liquid Dimensionless quantity Condensed matter physics Luttinger parameter Transient (oscillation) Function (mathematics) Quantum mechanics Impurity |
| Resumo: | We study the backscattered current in a Luttinger liquid in the presence of a pointlike weak impurity switched on at finite time, taking into account finite-temperature effects. We show how the well-known results for a static impurity are distorted. We derive a dimensionless parameter τ<sub>R</sub> as a function of the electron-electron interaction and the temperature, such that for τ<sub>R</sub> <1(>1) the switching process is relevant (irrelevant). Our results suggest the possibility of determining the value of the Luttinger parameter K through time measurements in transport experiments at fixed voltage. |
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