QUANTUM DISORDERED REGIME AND SPIN GAP IN THE CUPRATE SUPERCONDUCTORS

Note

关键词: MAGNETIC-PROPERTIES;    NUCLEAR-RELAXATION;    LATTICE RELAXATION;    KNIGHT-SHIFT;    NMR;    DYNAMICS;    LA1.85SR0.15CUO4;    LA2-XSRXCUO4;    YBA2CU4O8;    MODEL;   

DOI  :  10.1103/PhysRevB.49.1544

来源: SCIE

【 摘 要 】

We discuss the crossover from the quantum critical, z=1, to the quantum disordered regime in high-T-c materials in relation to the experimental data on the nuclear relaxation, bulk susceptibility, and inelastic neutron scattering. In our scenario, the spin excitations develop a gap Delta similar to Delta(xi) = c/xi well above T-c, which is supplemented by the quasiparticle gap below T-c. The above experiments yield consistent estimates for the value of the spin gap, which for small doping increases as the correlation length decreases.

【 授权许可】

Free