Phonon line shapes in the vortx state of the phonon-mediated superconductor YNi{sub 2}B{sub 2}C.
Journal Article
·
· Physical Review. B, Condensed Matter and Materials Physics
- Materials Science Division
We present an inelastic neutron-scattering study of phonon line shapes in the vortex state of the type II superconductor YNi{sub 2}B{sub 2}C. In a previous study [Phys. Rev. Lett. 101 237002 (2008)] it was shown that certain phonons exhibit a clear signature of the superconducting gap 2{Delta} on entering the superconducting state. Our interest was to find out whether or not the line shape of such phonons reflects the inhomogeneous nature of the vortex state induced by a magnetic field smaller than the upper critical field B{sub c2}. We found that this is indeed the case because the observed phonon line shapes can be well described by a model considering the phonon as a local probe of the spatial variation of the superconducting gap. We found that even at B = 3 T, where the intervortex distance is less than 300 {angstrom}, the phonon line shape still shows evidence for a variation of the gap.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- SC
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1050180
- Report Number(s):
- ANL/MSD/JA-72654
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 22 Vol. 85; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- ENGLISH
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