2010/10/20 by Jan Kaczmarczyk, J. Kaczmarczyk, Mariusz Sadzikowski +2 · 1 citation
Physics and Astronomy · #Andreev reflection #Bound state #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Conductance #Cooper pair #Critical field #Magnetic field #Momentum (technical analysis) #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum mechanics #Reflection (computer programming) #Reflection symmetry #Superconductivity #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1016/j.physc.2010.10.009
published as Physica C 471, 193 (2011) · 15 pages, 6 figures, accepted in Physica C
arxiv created 2010/10/20 · openalex publication_date 2011/01/05 · arxiv updated 2011/03/10 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We consider Andreev reflection in a two dimensional junction between a normal metal and a heavy fermion superconductor in the Fulde-Ferrell (FF) type of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state. We assume s-wave symmetry of the superconducting gap. The parameters of the superconductor: the gap magnitude, the chemical potential, and the Cooper pair center-of-mass momentum Q, are all determined self-consistently within a mean-field (BCS) scheme. The Cooper pair momentum Q is chosen as perpendicular to the junction interface. We calculate the junction conductance for a series of barrier strengths. In the case of incoming electron with spin σ= 1 only for magnetic fields close to the upper critical field Hc2, we obtain the so-called Andreev window i.e. the energy interval in which the reflection probability is maximal, which in turn is indicated by a peak in the conductance. The last result differs with other non-self-consistent calculations existing in the literature.