Optimal T-c of cuprates: The role of screening and reservoir layers

Article

关键词: HIGH-TEMPERATURE SUPERCONDUCTIVITY;    RENORMALIZATION-GROUP APPROACH;    ELECTRONIC-STRUCTURE;    SUPEREXCHANGE MECHANISM;    J MODEL;    HAMILTONIANS;    PRESSURE;    SYSTEMS;    MERCURY;   

DOI  :  10.1103/PhysRevB.86.094506

来源: SCIE

【 摘 要 】

We explore the role of charge reservoir layers (CRLs) on the superconducting transition temperature of cuprate superconductors. Specifically, we study the effect of CRLs with efficient short distance dielectric screening coupled capacitively to copper oxide metallic layers. We argue that dielectric screening at short distances and at frequencies of the order of the superconducting gap, but small compared to the Fermi energy can significantly enhance T-c, the transition temperature of an unconventional superconductor. We discuss the relevance of our qualitative arguments to a broader class of unconventional superconductors.

【 授权许可】

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