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Superconductivity and low temperature electrical transport in B-doped CVD nanocrystalline diamond
- Source :
- Science and Technology of Advanced Materials. 7:S41-S44
- Publication Year :
- 2006
- Publisher :
- Informa UK Limited, 2006.
-
Abstract
- The dispersion of acoustic and optical phonons in highly boron-doped diamond has been measured by inelastic X-ray scattering at an energy resolution of 6.4 meV. The sample is doped in the metallic regime and shows superconductivity below 4.2 K (midpoint). The data are compared to pure and nitrogen-doped diamond that represent the non-metallic state. No difference is found for the acoustic phonons in the three samples, while the optical phonons show a shift of the dispersion (softening) in qualitative agreement with earlier results from Raman spectroscopy. The presence of boron and nitrogen incorporated into the diamond lattice leads to structural disorder. Evidence for this is found both in the observation of otherwise symmetry-forbidded Bragg intensity at (0 0 2) and intensity from acoustic phonon modes in the vicinity of (0 0 2).
- Subjects :
- Superconductivity
Materials science
Condensed matter physics
Phonon
Scattering
Material properties of diamond
Diamond
engineering.material
Condensed Matter::Materials Science
symbols.namesake
Condensed Matter::Superconductivity
Dispersion (optics)
symbols
engineering
Condensed Matter::Strongly Correlated Electrons
General Materials Science
Diamond cubic
Raman spectroscopy
Subjects
Details
- ISSN :
- 18785514 and 14686996
- Volume :
- 7
- Database :
- OpenAIRE
- Journal :
- Science and Technology of Advanced Materials
- Accession number :
- edsair.doi...........832dda05f53056dd3911e74f3fd945d8