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11 papers · 1 filter
Large Seebeck coefficients in Iron-oxypnictides : a new route towards n-type thermoelectric materials
Loreynne Pinsard-Gaudart, David Berardan, Julien Bobroff +1
The iron-oxypnictide compounds, recently reported as a new class of superconductors when appropriately doped, exhibit large Seebeck coefficients, of the order of -100 microV/K, whi…
Symmetries of the quasi-1d Bechgaard salts superconducting state in an applied magnetic field
N. Belmechri, G. Abramovici, M. Heritier
We investigate the possible superconducting pairing symmetries which would account for the latest experimental results on the Bechgaard salts. Using a renormalization group (R.G) t…
Magnetic-Field Variations of the Pair-Breaking Effects of Superconductivity in (TMTSF)2ClO4
Shingo Yonezawa, Shuichi Kusaba, Yoshiteru Maeno +3
We have studied the onset temperature of the superconductivity Tc_onset of the organic superconductor (TMTSF)2ClO4, by precisely controlling the direction of the magnetic field H.…
Anomalous In-Plane Anisotropy of the Onset of Superconductivity in (TMTSF)2ClO4
Shingo Yonezawa, S. Kusaba, Y. Maeno +4
We report the magnetic field-amplitude and field-angle dependence of the superconducting onset temperature Tc_onset of the organic superconductor (TMTSF)2ClO4 in magnetic fields H…
Disorder, Metal-Insulator crossover and Phase diagram in high-Tc cuprates
F. Rullier-Albenque, H. Alloul, F. Balakirev +1
We have studied the influence of disorder induced by electron irradiation on the normal state resistivities of optimally and underdoped YBa2CuOx single crystals, using pulse…
Subharmonic gap structures and Josephson effect in MgB2/Nb micro-constrictions
Filippo Giubileo, Marco Aprili, Fabrizio Bobba +3
Superconducting micro-constrictions between Nb tips and high quality MgB pellets have been realized by means of a point-contact inset, driven by a micrometric screw. Measurem…