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7 papers · 2 filters
Microwave conductivity and superfluid density in strongly overdoped Tl2201
D. Deepwell, D. C. Peets, C. J. S. Truncik +7
We present measurements of the microwave surface impedance of the single-layer cuprate Tl2201, deep in the overdoped regime, with Tc ~ 25 K. Measurements have been made using cavit…
Zero-Field muSR Search for a Time-Reversal-Symmetry-Breaking Mixed Pairing State in Superconducting Ba1-xKxFe2As2
Z. Lotfi Mahyari, A. Cannell, C. Gomez +6
We report the results of a zero-field muon spin relaxation (ZF-muSR) study of superconducting Ba1-xKxFe2As2 (0.5 < x < 0.9) in search of weak spontaneous internal magnetic fields a…
Disorder effects on superconducting tendencies in the checkerboard Hubbard model
Peter M. Smith, Malcolm P. Kennett
The question of whether spatially inhomogeneous hopping in the two dimensional Hubbard model can lead to enhancement of superconductivity has been tackled by a number of authors in…
Universal inhomogeneous magnetic-field response in the normal state of cuprate high-Tc superconductors
Z. Lotfi Mahyari, A. Cannell, E. V. L. de Mello +5
We report the results of a muon spin rotation (muSR) study of the bulk of Bi{2+x}Sr{2-x}CaCu2O{8+δ}, as well as pure and Ca-doped YBa2Cu3Oy, which together with prior measurements…
Evidence for temperature dependent spin-diffusion as a mechanism of intrinsic flux noise in SQUIDs
T. Lanting, M. H. Amin, A. J. Berkley +4
The intrinsic flux noise observed in superconducting quantum interference devices (SQUIDs) is thought to be due to the fluctuation of electron spin impurities, but the frequency an…
Microwave spectroscopy of vortex dynamics in ortho-II YBa2Cu3O6.52
Xiaoqing Zhou, C. J. S. Truncik, W. A. Huttema +7
We present measurements of the vortex-state surface impedance, Z_s = R_s + i X_s, of a high quality, ortho-II-ordered single crystal of the cuprate high temperature superconductor…