Strong-coupling analysis of scanning tunneling spectra in Bi2Sr2Ca2Cu3O10+delta

Article

关键词: T-C SUPERCONDUCTORS;    HIGH-TEMPERATURE SUPERCONDUCTORS;    INELASTIC NEUTRON-SCATTERING;    DENSITY-OF-STATES;    CUPRATE SUPERCONDUCTORS;    SPIN EXCITATION;    ELECTRONIC-SPECTRA;    SINGLE-CRYSTALS;    MAGNETIC EXCITATIONS;    SYSTEM YBA2CU3O6+X;   

DOI  :  10.1103/PhysRevB.88.014528

来源: SCIE

【 摘 要 】

We study a series of spectra measured in the superconducting state of optimally doped Bi2Sr2Ca2Cu3O10+delta (Bi-2223) by scanning tunneling spectroscopy. Each spectrum, as well as the average of spectra presenting the same gap, is fitted using a strong-coupling model taking into account the band structure, the BCS gap, and the interaction of electrons with the spin resonance. After describing our measurements and the main characteristics of the strong-coupling model, we report the whole set of parameters determined from the fits, and we discuss trends as a function of the gap magnitude. We also simulate angle-resolved photoemission spectra, and compare with recent experimental results.

【 授权许可】

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