Počet záznamů: 1
Isotopic substitution of boron and carbon in superconducting diamond epilayers grown by MPCVD
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SYSNO ASEP 0346854 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Isotopic substitution of boron and carbon in superconducting diamond epilayers grown by MPCVD Tvůrce(i) Achatz, P. (FR)
Omnès, F. (FR)
Ortega, L. (FR)
Marcenat, C. (FR)
Vacík, Jiří (UJF-V) RID, ORCID, SAI
Hnatowicz, Vladimír (UJF-V) RID
Koster, U. (FR)
Jomard, F. (FR)
Bustarret, E. (FR)Zdroj.dok. Diamond and Related Materials. - : Elsevier - ISSN 0925-9635
Roč. 19, č. 7 (2010), s. 814-817Poč.str. 4 s. Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova Isotopic effects ; Vibrational properties ; p-type doping Vědní obor RIV BM - Fyzika pevných látek a magnetismus CEP KAN400480701 GA AV ČR - Akademie věd CEZ AV0Z10480505 - UJF-V (2005-2011) UT WOS 000279229700025 DOI 10.1016/j.diamond.2010.01.052 Anotace Sets of heavily boron-doped {100}-oriented diamond epilayers have been grown by MPCVD from isotope-enriched gases such as (CH4)-C-13 and (B2H6)-B-10 or (CH4)-C-13 and naturally abundant (B2H6)-B-11, and the resulting concentration profiles of the various boron isotopes were measured by SIMS. In the particular case of the (CB)-C-13-B-10 set, the high absorption cross section of B-10 made neutron depth profiling possible for this element. The vibrational and superconducting properties of these epilayers were compared to those of films grown from gases containing the isotopes in their natural abundance. The critical temperature T-c values were found to be lower both in the (CB)-C-13-B-11 and (CB)-C-13-B-10 sets, as expected for a conventional pairing mechanism mediated by phonons. In good agreement with recent studies, the isotope-effect coefficient for Tc was found to be much higher than the classical 0.5 value. Various origins for this behaviour are suggested. Pracoviště Ústav jaderné fyziky Kontakt Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Rok sběru 2011
Počet záznamů: 1