Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2006-05-08
Phys. Rev. Lett. 97, 124102 (2006)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
4 pages, 4 figures
Scientific paper
10.1103/PhysRevLett.97.124102
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 $\Delta E\approx 2 E_g^{\rm RMT}$ which can be much larger than the narrow resonance width $\Gamma_S=\hbar/t_S$ of the scar in the normal system. The minimal value of the excitation gap within this window is given by $\Gamma_S/2\ll E_g^{\rm RMT}$. 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.
Kormanyos Andor
Schomerus Henning
No associations
LandOfFree
Non-universal suppression of the excitation gap in chaotic Andreev billiards: Superconducting terminals as sensitive probes for scarred states does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Non-universal suppression of the excitation gap in chaotic Andreev billiards: Superconducting terminals as sensitive probes for scarred states, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-universal suppression of the excitation gap in chaotic Andreev billiards: Superconducting terminals as sensitive probes for scarred states will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-463338