2008/07/31 by Adam Nahum, A. Nahum, Eldad Bettelheim +1 · 6 citations
Mathematics · Physics and Astronomy · #Boltzmann constant #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Instability #Mathematics #Physics #Physics of Superconductivity and Magnetism #Point (geometry) #Quantum mechanics #Quantum, superfluid, helium dynamics #Statistical physics #Superconductivity #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.78.184510
published in Physical Review B 78(18) (American Physical Society) · 12 pages, 3 figures
openalex publication_date 2008/11/10 · arxiv created 2008/11/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In many situations a BCS-type superconductor will develop an imbalance between the populations of the holelike and electronlike spectral branches. This imbalance suppresses the gap. It has been noted by Gal'perin et al. [Sov. Phys. JETP 54, 1126 (1981)] that at large imbalance, when the gap is substantially suppressed, an instability develops. The analytic treatment of the system beyond the instability point is complicated by the fact that the Boltzmann approach breaks down. We study the short-time behavior following the instability, in the collisionless regime, using methods developed by Yuzbashyan et al. [J. Phys. A 38, 7831 (2005); Phys. Rev. B 72, 220503(R) (2005)].