| Issue |
EPL
Volume 90, Number 6, June 2010
|
|
|---|---|---|
| Article Number | 67002 | |
| Number of page(s) | 6 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/90/67002 | |
| Published online | 08 July 2010 | |
Multi-gapped states in BCS superconductors
Racah Institute of Physics, Hebrew
University - Jeruslaem, Israel
Corresponding author: eldadb@phys.huji.ac.il
Received:
12
May
2010
Accepted:
9
June
2010
A BCS (Bardeen-Cooper-Schrieffer) superconductor, which is placed out of equilibrium, can develop quantum instabilities, which manifest themselves in oscillations of the superconductor's order parameter (pairing amplitude 
). These instabilities are manifestations of the Cooper instability. Inelastic collisions are essential in resolving those instabilities. Incorporating the quantum instabilities and collisions in a unified approach based on Richardson's exact solution of the pairing Hamiltonian, we find that a BCS superconductor may end up in a state in which the spectrum has more than one gap.
PACS: 74.20.Fg – BCS theory and its development / 02.30.Ik – Integrable systems
© EPLA, 2010
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