1998/09/01 by H. Feldmann, Feldmann, H., R. Oppermann +1
Physics and Astronomy · #Condensed Matter (cond-mat) #FOS: Physical sciences #cond-mat
paper · pdf · doi:10.48550/arxiv.cond-mat/9809001
4 pages, 5 figures
arxiv created 1998/09/01 · arxiv updated 2009/11/30
The phase diagram of a single species fermion model allowing for local pairing superconductivity (SC) and spin glass order (SG) is derived as a function of chemical potential μand ratio r=v/J between attractive coupling v and frustrated magnetic interaction J. For ratios larger than a characteristic rc(μ), superconductivity does not allow for SG order, while for smaller values a very detailed phase diagram arises with entangled spin glass and superconducting transitions. Our results for the Green's functions show that superconductivity occurring in the magnetic interaction band is of gapless type with a crossover from strongly gapless, within a certain range below Tc, to very weakly gapless in a wide low temperature regime, and hardgapped at T=0.