Frequency-Dependent Thermal Response of the Charge System and the Restricted Sum Rules ofLa2−xSrxCuO4

2004/07/16 by M. Ortolani, Michele Ortolani, P. Calvani +1 · 4 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.94.067002

published as Phys. Rev. Lett. 94, 067002 (2005) · 4 pages with 3 figs

arxiv created 2004/07/16 · openalex publication_date 2005/02/14 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

In La_2\ensuremath-xSr_xCuO₄ (LSCO) the spectral weight W=\ensuremath∫₀^\ensuremathΩ\ensuremathσ₁^ab(\ensuremathω,T)d\ensuremathω [where \ensuremathσ₁^ab(\ensuremathω,T) is the ab-plane conductivity] obeys the same law W=W₀\ensuremath-B(\ensuremathΩ)T² as in a conventional metal such as gold, for any \ensuremathΩ up to the plasma edge. However, in LSCO B(\ensuremathΩ) points toward correlation effects and, unlike in gold, is related to an energy scale t_T\ensuremath≪t₀\ensuremath∼W₀. The Ferrell-Glover-Tinkham sum rule is fulfilled in LSCO superconductors for \ensuremathΩ\ensuremath\gtrsim2000 cm^\ensuremath-1.

Citations

• Effect of orbital currents on the restricted optical conductivity sum rule
• Sum rules and energy scales in the high-temperature superconductorYBa2Cu3O6+x
• The pseudogap in high-temperature superconductors: an experimental survey

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