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8 papers · 2 filters
High-Quality Planar high-Tc Josephson Junctions
N. Bergeal, X. Grison, J. Lesueur +3
Reproducible high-Tc Josephson junctions have been made in a rather simple two-step process using ion irradiation. A microbridge (1 to 5 ?m wide) is firstly designed by ion irradia…
Coupling between quasiparticles and a bosonic mode in the normal state of HgBaCuO
Y. Gallais, M. Le Tacon, A. Sacuto +1
We report a doping dependent study of the quasiparticles dynamics in HgBaCuO via Electronic Raman Scattering. A well-defined energy scale is found in the normal state d…
Heat transport in Bi_{2+x}Sr_{2-x}CuO_{6+δ}: departure from the Wiedemann-Franz law in the vicinity of the metal-insulator transition
Cyril Proust, Kamran Behnia, Romain Bel +2
We present a study of heat transport in the cuprate superconductor Bi_{2+x}Sr_{2-x}CuO_{6+δ} at subkelvin temperatures and in magnetic fields as high as 25T. In several samples wit…
Extended paraconductivity regime in underdoped cuprates
S. Caprara, M. Grilli, B. Leridon +1
We reconsider transport experiments in strongly anisotropic superconducting cuprates and we find that universal Aslamazov-Larkin (AL) paraconductivity in two dimensions is surprisi…
Kinetic energy change with doping upon superfluid condensation in high temperature superconductors
G. Deutscher, A. F. Santander-Syro, N. Bontemps
In conventional BCS superconductors, the electronic kinetic energy increases upon superfluid condensation (the change DEkin is positive). Here we show that in the high critical tem…
Two Distinct Electronic Contributions in the Fully Symmetric Raman Response of High Cuprates
M. Le Tacon, A. Sacuto, D. Colson
We show by non resonant effect in HgBaCuO (Hg-1201)and by Zn substitutions in YBaCuO (Y-123) compounds that the fully symmetric Raman spectrum has two d…