Charged vortex and critical fields in charged Bose-liquids and unconventional superconductors

✍ Scribed by A.S. Alexandrov

• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 359 KB
• Volume: 404
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2003.10.038

✦ Synopsis

A single vortex in the charged Bose-gas (CBG) has a charged core and its profile different from the vortex in neutral and BCS superfluids. Lower and upper critical fields of CBG are discussed. The unusual resistive upper critical field, H c2 ðT Þ, of many cuprates and a few other unconventional superconductors is described as the Bose-Einstein condensation field of preformed bosons-bipolarons. Its nonlinear temperature dependence follows from the scaling arguments. Exceeding the Pauli paramagnetic limit is explained. Controversy in the determination of H c2 ðT Þ of cuprates from kinetic and thermodynamic measurements is addressed in the framework of the bipolaron theory.