2001/08/31 by Ch. Helm, L. N. Bulaevskii, L. N. Bulaevskiǐ +3 · 1 citation
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.mtrl-sci #cond-mat.supr-con #physics.optics
paper · pdf · doi:10.1103/physrevlett.89.057003
published as Phys. Rev. Lett. 89,5 (2002) 057003 · 4 pages, 4 postscript figures, misprints in table corrected
arxiv created 2002/06/27 · openalex publication_date 2002/07/16 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We compute the frequency and magnetic field dependencies of the reflectivity R(\ensuremathω) in layered superconductors with two alternating intrinsic Josephson junctions with different critical current densities and quasiparticle conductivities for the electric field polarized along the c axis. The parameter \ensuremathα describing the electronic compressibility of the layers and the charge coupling of neighboring junctions was extracted for the SmLa_1\ensuremath-xSr ︀xCuO ︀_4\ensuremath-\ensuremathδ superconductor from two independent optical measurements, the fit of the loss function L(\ensuremathω) at zero magnetic field and the magnetic field dependence of the peak positions in L(\ensuremathω). The experiments are consistent with a free electron value for \ensuremathα.