Structure and superconductivity of isotope-enriched boron-doped diamond
- Los Alamos National Laboratory
- INSTIT OF HIGH PRESSURE
- MOSCOW SU
- INST FOR NUCI RES
- INST FOR HIGH PRESSURE
Superconducting boron-doped diamond samples were synthesized with isotopes of {sup 10}B, {sup 11}B, {sup 13}C and {sup 12}C. We claim the presence of a carbon isotope effect on the superconducting transition temperature, which supports the 'diamond-carbon'-related nature of superconductivity and the importance of the electron-phonon interaction as the mechanism of superconductivity in diamond. Isotope substitution permits us to relate almost all bands in the Raman spectra of heavily boron-doped diamond to the vibrations of carbon atoms. The 500 cm{sup 01} Raman band shifts with either carbon or boron isotope substitution and may be associated with vibrations of paired or clustered boron. The absence of a superconducting transition (down to 1.6 K) in diamonds synthesized in the Co-C-B system at 1900 K correlates with the small boron concentration deduced from lattice parameters.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC52-06NA25396
- OSTI ID:
- 960980
- Report Number(s):
- LA-UR-08-06866; LA-UR-08-6866; TRN: US201008%%879
- Journal Information:
- Science and Technology of Advanced Materials, Journal Name: Science and Technology of Advanced Materials; ISSN 1468-6996
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATOMS
BORON
BORON 10
BORON 11
BORON ISOTOPES
CARBON
CARBON 12
CARBON 13
CARBON ISOTOPES
CHEMICAL COMPOSITION
CRYSTAL STRUCTURE
DIAMONDS
DOPED MATERIALS
ELECTRON-PHONON COUPLING
INTERACTIONS
ISOTOPES
LATTICE PARAMETERS
RAMAN SPECTRA
SUPERCONDUCTIVITY
SYNTHESIS
TRANSITION TEMPERATURE