Dynamical conductivity at the dirty superconductor-metal quantum phase transition
We study the transport properties of ultrathin disordered nanowires in the neighborhood of the superconductor-metal quantum phase transition. To this end we combine numerical calculations with analytical strong-disorder renormalization group results. The quantum critical conductivity at zero tempera...
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| Autor principal: | |
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| Formato: | Online |
| Lenguaje: | portugués |
| Publicado: |
Universidade Estadual de Campinas
2011
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| Materias: | |
| Acceso en línea: | https://econtents.sbu.unicamp.br/eventos/index.php/phyproceedings/article/view/3282 |
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| Sumario: | We study the transport properties of ultrathin disordered nanowires in the neighborhood of the superconductor-metal quantum phase transition. To this end we combine numerical calculations with analytical strong-disorder renormalization group results. The quantum critical conductivity at zero temperature diverges logarithmically as a function of frequency. In the metallic phase, it obeys activated scaling associated with an in?nite-randomness quantum critical point. We extend the scaling theory to higher dimensions and discuss implications for experiments. |
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| ISSN: | 2236-7535 |
