Non-universal suppression of the excitation gap in chaotic Andreev billiards: Superconducting terminals as sensitive probes for scarred states
| dc.creator | Kormanyos, Andor | |
| dc.creator | Schomerus, Henning | |
| dc.date | 2006-05-08 | |
| dc.date.accessioned | 2026-07-07T07:08:50Z | |
| dc.date.available | 2026-07-07T07:08:50Z | |
| dc.description | When a quantum-chaotic normal conductor is coupled to a superconductor, random-matrix theory predicts that a gap opens up in the excitation spectrum which is of universal size $E_g^{\rm RMT}\approx 0.3 \hbar/t_D$, where $t_D$ is the mean scattering time between Andreev reflections. We show that a scarred state of long lifetime $t_S\gg t_D$ suppresses the excitation gap over a window $ΔE\approx 2 E_g^{\rm RMT}$ which can be much larger than the narrow resonance width $Γ_S=\hbar/t_S$ of the scar in the normal system. The minimal value of the excitation gap within this window is given by $Γ_S/2\ll E_g^{\rm RMT}$. Hence the scarred state can be detected over a much larger energy range than it is the case when the superconducting terminal is replaced by a normal one. | |
| dc.description | 4 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0605205 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0605205 | |
| dc.identifier | Phys. Rev. Lett. 97, 124102 (2006) | |
| dc.identifier | doi:10.1103/PhysRevLett.97.124102 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/110853 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.subject | Superconductivity | |
| dc.title | Non-universal suppression of the excitation gap in chaotic Andreev billiards: Superconducting terminals as sensitive probes for scarred states | |
| dc.type | text |