2006/08/31 by Jun Goryo, Shingo Soma, Singo Soma +1 · 67 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Deconfinement #Flux (metallurgy) #Josephson effect #Magnetic field #Magnetic flux #Magnetic flux quantum #Materials science #Phase transition #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Quantum, superfluid, helium dynamics #Superconductivity #Thermodynamics #Vortex #cond-mat.stat-mech #cond-mat.supr-con #quant-ph
paper · pdf · doi:10.1209/0295-5075/80/17002
published in Europhysics Letters (EPL) 80(1), 17002 (Institute of Physics) · 5 pages, 3 figures, to be published in Europhys. Lett
arxiv created 2007/08/09 · openalex publication_date 2007/09/05 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We propose a new stage of confinement-deconfinement transition, which can be observed in laboratory. In two-gap superconductors (SCs), two kinds of vortex exist and each of them carries a continuously variable fraction of the unit flux quanta Φ 0 = hc /2 e . The confined state of these two is a usual vortex and stable in the low-temperature region of the system under a certain magnetic field above H c 1 . We see an analogy to quarks in a charged pion. An entropy gain causes two fractional vortices to be deconfined above a certain temperature.