A point-contact study of the superconducting gaps in Al-substituted and C-substituted MgB2 single crystals
METADATA ONLY
Loading...
Author / Producer
Date
2006
Publication Type
Conference Paper
ETH Bibliography
yes
Citations
Altmetric
METADATA ONLY
Data
Rights / License
Abstract
We present the results of directional point-contact spectroscopy in state-of-the-art Mg1−xAlxB2 and Mg(B1−yCy)2 single crystals produced at ETHZ. Fitting the conductance curves of our point contacts, that always feature Andreev reflection structures, we obtained the doping dependence of the gap amplitudes. The results are discussed in comparison with other experimental findings and relevant theoretical predictions. We conclude that the physics of Al-substituted crystals at x≥0.09 might be governed by phase segregation, while C-substituted crystals unexpectedly show a doping-induced transition to single-gap superconductivity at y=0.132.
Permanent link
Publication status
published
External links
Editor
Book title
Journal / series
Volume
67 (1-3)
Pages / Article No.
360 - 364
Publisher
Elsevier
Event
2004 International Conference on Spectroscopies in Novel Superconductors (SNS 2004)
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
Organisational unit
03569 - Batlogg, Bertram (emeritus)