Fluctuation-Induced Excess Conductivity and Infrared Spectra in Y Doped BSCCO Superconductors

Drude behavior in the far-infrared conductivity of cuprate superconductors

H.L. Liu1,∗, M. Quijada1,∗∗, D.B. Romero1,∗∗∗, D.B. Tanner1,#, A. Zibold1,◦, G.L. Carr2,§, H. Berger3, L. Forró3, L. Mihaly4, G. Cao5, Beom-Hoan O6, J.T. Markert6, J. P. Rice7, M. J. Burns8, and K.A. Delin8 1 Department of Physics, University of Florida, Gainesville, FL 32611-8440, USA 2 National Synchrotron Light Source, BNL, Upton, NY 11973, USA 3 Ecole Polytechnique Fédérale, 1015 Lausanne, ...

Infrared Hall conductivity in optimally doped Bi2Sr2CaCu2O8+ : Drude behavior examined by experiment and fluctuation-exchange-model calculations

D. C. Schmadel,1,* G. S. Jenkins,1,* J. J. Tu,2,3 G. D. Gu,3 Hiroshi Kontani,4 and H. D. Drew1,5 1Department of Physics, University of Maryland, College Park, Maryland 20742, USA 2Department of Physics, City University of New York, New York, New York 11973, USA 3Department of Physics, Brookhaven National Laboratory, Upton, New York 11973, USA 4Department of Physics, Nagoya University, Furo-cho,...

Enhanced Proton Conductivity in Y‐Doped BaZrO3 via Strain Engineering

The effects of stress-induced lattice distortions (strain) on the conductivity of Y-doped BaZrO3, a high-temperature proton conductor with key technological applications for sustainable electrochemical energy conversion, are studied. Highly ordered epitaxial thin films are grown in different strain states while monitoring the stress generation and evolution in situ. Enhanced proton conductivity...

Microwave Electrodynamics of the Electron-Doped Cuprate Superconductors Pr2−xCexCuO4−y and Nd2−xCexCuO4−y

The pairing state symmetry of the electron-doped cuprate superconductors is thought to be s-wave in nature, in contrast with their hole-doped counterparts which exhibit a d-wave symmetry. We re-examine this issue based on recent improvements in our electron-doped materials and our measurement techniques. We report microwave cavity perturbation measurements of the temperature dependence of the p...

Apparent Universal Behavior of Fluctuation-Induced Diamagnetism in Superconductors