Volume 56, Number 2, October 2001
|Page(s)||296 - 301|
|Section||Condensed matter: electronic structure, electrical, magnetic, and opticalproperties|
|Published online||01 December 2003|
Superconducting energy gap distribution of investigated by point-contact spectroscopy
Physikalisches Institut, Universität Karlsruhe -
D-76128 Karlsruhe, Germany
2 Forschungszentrum Karlsruhe, Institut für Festkörperphysik D-76021 Karlsruhe, Germany
Corresponding author: firstname.lastname@example.org
Accepted: 20 July 2001
We performed point-contact spectroscopy on the binary superconductor MgB2. The differential conductance shows gap-related structures which vary in width and position from contact to contact. The distribution of energy gaps shows a distinct accumulation around 1.7 and 7 meV which is associated with the occurrence of a small and a large energy gap in MgB2. While with increasing T the structure in associated with the small gap is present up to , in magnetic field it is suppressed well below .
PACS: 74.70.Ad – Metals; alloys and binary compounds (including A15, Laves phases, etc.) / 74.80.Fp – Point contacts; SN and SNS junctions / 74.20.Rp – Pairing symmetries (other than s-wave)
© EDP Sciences, 2001
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