Spin-charge gauge compositeness of electron in HTS: Hints from metal-insulator crossover and entropy behavior

摘要

We show that the coexistence of Fermi arcs and metal-insulator crossover of the in-plane resistivity can give a hint of a peculiar "gauge compositeness" of the electron in hole-doped high T-c cuprates and a similar hint also comes from the negative intercept at T = 0 of the electronic entropy extrapolated from moderate temperatures in the "pseudogap phase". An implementation of this "compositeness" within the spin-charge gauge approach is outlined and is employed to discuss the above phenomena. (C) 2008 Elsevier Ltd. All rights reserved.