Impact of electron-electron interactions on the superfluid density of dirty superconductors

Article

关键词: PENETRATION DEPTH;    TEMPERATURE;    GRAPHENE;    ELECTRODYNAMICS;    GRAPHITE;    ALLOYS;    LIQUID;    SYSTEM;    TC;   

DOI  :  10.1103/PhysRevB.99.184503

来源: SCIE

【 摘 要 】

Landau's theory of the Fermi liquid is adapted to analyze the impact of electron-electron (interactions on the deficit of the superfluid density rho(s0) = rho(s)(T = 0) in dirty superconducting electron systems in which the damping gamma of single-particle excitations exceeds the zero-temperature BCS gap Delta(0). In the dirty strong-coupling limit gamma/Delta(0) >> 1, m(*)/m(e) >> 1, the formula derived for rho(s0) is shown to coincide with the well-known empirical Uemura relation provided pair-breaking contributions are nonexistent. The roles of the crystal lattice and magnetic pair-breaking effects in the observed decline of the zero-temperature superfluid density rho(s0) in overdoped La1-xSrxCuO4 compounds are also discussed, and our procedure is applied to elucidation of results from the pioneering experimental studies performed recently by Bozovic and collaborators in these compounds.

【 授权许可】

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