Quasiparticle formation and optical sum rule violation in cuprate superconductors

Article

关键词: T-C SUPERCONDUCTORS;    HIGH-TEMPERATURE SUPERCONDUCTORS;    CONDENSATION ENERGY;    BI2SR2CACU2O8+DELTA;    CONDUCTIVITY;    SPECTRA;    WEIGHT;   

DOI  :  10.1103/PhysRevB.66.100506

来源: SCIE

【 摘 要 】

Using a simple model for the frequency dependent scattering rate, we evaluate the in-plane optical integral for cuprate superconductors in the normal and superconducting states. In the overdoped region, this integral is conserved. In the optimal and underdoped region, though, the optical integrals differ, implying a lowering of the in-plane kinetic energy in the superconducting state. This sum rule violation, due to the difference of the non-Fermi-liquid normal state and the superconducting Fermi-liquid state, has a magnitude comparable to recent experimental results.

【 授权许可】

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