Abstract
Measurements of the in-plane and out-of-plane electronic Raman continuum in MgB2 single crystals show markedly different behaviour below Tc, indicative of a complex gap structure. In xx and xy polarisation configurations, a sharp pair-breaking peak is seen near 100 cm-1 but no scattering threshold forms directly below the peak. In zz and zx polarisations, a threshold is seen at 30 cm-1 but no pair-breaking peak appears. This behaviour can be understood in terms of band-dependent impurity scattering effects on two separate gaps.
Original language | English |
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Pages (from-to) | 131-132 |
Number of pages | 2 |
Journal | Physica C: Superconductivity and its applications |
Volume | 388-389 |
DOIs | |
Publication status | Published - 2003 May |
Externally published | Yes |
Event | proceedings of the 23rd international conference on low temper - Hiroshima, Japan Duration: 2002 Aug 20 → 2002 Aug 27 |
Keywords
- MgB
- Raman spectroscopy
- Superconducting gap
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering