Physics – Condensed Matter – Superconductivity
Scientific paper
2003-05-23
Physica C 408-410, 796 (2004)
Physics
Condensed Matter
Superconductivity
2 pages, 2 figures, proceedings of M2S-HTSC-VII conference, Rio de Janeiro (May 2003)
Scientific paper
10.1016/j.physc.2004.03.135
The results of the first directional point-contact measurements in MgB2 single crystals, in the presence of magnetic fields up to 9 T either parallel or perpendicular to the ab planes, are presented. By applying suitable magnetic fields, we separated the partial contributions of the sigma and pi bands to the total Andreev-reflection conductance. Their fit with the BTK model allowed a very accurate determination of the temperature dependency of the gaps (Delta_sigma and Delta_pi), that resulted in close agreement with the predictions of the two-band models for MgB2. We also obtained, for the first time with point-contact spectroscopy, the temperature dependence of the (anisotropic) upper critical field of the sigma band and of the (isotropic) upper critical field of the pi band.
Calzolari Arrigo
Daghero Dario
Dellarocca Valeria
Gonnelli Renato S.
Jun Jinha
No associations
LandOfFree
Directional point-contact spectroscopy of MgB2 single crystals in magnetic fields: two-band superconductivity and critical fields does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Directional point-contact spectroscopy of MgB2 single crystals in magnetic fields: two-band superconductivity and critical fields, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Directional point-contact spectroscopy of MgB2 single crystals in magnetic fields: two-band superconductivity and critical fields will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-133319