Structure and superconductivity of isotope-enriched boron-doped diamondстатья
Информация о цитировании статьи получена из
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 31 июля 2016 г.
Аннотация:Superconducting boron-doped diamond samples were synthesized with isotopes of 10B,
11B, 13C and 12C. 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−1 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 1.6K) in diamonds synthesized in the Co–C–B system at 1900K correlates
with the small boron concentration deduced from lattice parameters.