| Автор | V C Hui |
| Автор | C J Lambert |
| Дата выпуска | 1993-12-13 |
| dc.description | We examine the change delta G in the two-probe electrical conductance G of a mesoscopic sample due to the switching on of superconductivity and prove that when conductance of the normal mesoscopic host is sufficiently high, the onset of superconductivity always produces a decrease in G. If the superconducting order parameter is of magnitude Delta , we focus attention on the susceptibility chi <sub>Delta </sub>=lim<sub>Delta to 0</sub> delta G( Delta )/ delta ( Delta <sup>2</sup>). For weakly disordered, (i.e. ballistic) normal hosts, the average value of this quantity is negative. For diffusive hosts, the mean of chi <sub>Delta </sub> increases linearly with (N-G(0)), where N is the number of open channels in the external. current carrying probes, while the fluctuations about the mean are found to be independent of G(0). With increasing normal disorder, chi <sub>Delta </sub> undergoes a transition to a region of large fluctuations, before approaching a strongly localized regime, where typical values of chi <sub>Delta </sub> are of order (ln<sup>2</sup>G(0))<sup>-1</sup>. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Superconductivity-induced conductance suppression in mesoscopic solids |
| Тип | lett |
| DOI | 10.1088/0953-8984/5/50/001 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 5 |
| Первая страница | L651 |
| Последняя страница | L662 |
| Аффилиация | V C Hui; Sch. of Phys. & Mater., Lancaster Univ., UK |
| Аффилиация | C J Lambert; Sch. of Phys. & Mater., Lancaster Univ., UK |
| Выпуск | 50 |
