1999/08/13 by Diana Dulić, D. Dulic, D. van der Marel +8 · 1 citation
Chemistry · Physics and Astronomy · #Inorganic Fluorides and Related Compounds #Physics of Superconductivity and Magnetism #Superconductivity in MgB2 and Alloys #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.60.r15051
4 pages, 3 figures
arxiv created 1999/08/13 · openalex publication_date 1999/12/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The c-axis Josephson plasmons in optimally doped single-layer and bilayer high-Tc cuprates Tl2Ba2CuO6 and Tl2Ba2CaCu2O8 have been investigated using infrared spectroscopy. We observed the plasma frequencies for these two compounds at 27.8 and 25.6 cm^\ensuremath-1 respectively, which we interpret as Josephson resonances across the TlO blocking layers. No maximum in the temperature dependence of the c-axis conductivity was observed below Tc, indicating that even in the superconducting state a coherent quasiparticle contribution to the c-axis conductivity is absent or very weak.