Low-energy quasiparticles in cuprate superconductors: A quantitative analysis

Article

关键词: MICROWAVE SURFACE IMPEDANCE;    A-B PLANE;    UNCONVENTIONAL SUPERCONDUCTORS;    UNTWINNED YBA2CU3O6.95;    PENETRATION DEPTH;    SINGLE-CRYSTALS;    GAP ANISOTROPY;    BI2SR2CACU2O8+DELTA;    YBA2CU3O7-DELTA;    VORTEX;   

DOI  :  10.1103/PhysRevB.62.3554

来源: SCIE

【 摘 要 】

A residual linear term is observed in the thermal conductivity of optimally doped Bi2Sr2CaCu2O8 at very low temperatures whose magnitude is in excellent agreement with the value expected from Fermi-liquid theory and the d-wave energy spectrum measured by photoemission spectroscopy with no adjustable parameters. This solid basis allows us to make a quantitative analysis of thermodynamic properties at low temperature and establish that thermally excited quasiparticles are a significant, perhaps even the dominant, mechanism in suppressing the superfluid density in cuprate superconductors Bi2Sr2CaCu2O8 and YBa2Cu3O7.

【 授权许可】

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