Superconductivity and low temperature electrical transport in B-doped CVD nanocrystalline diamond
| Autor: | Milos Nesladek, Jiri J. Mares, Dominique Tromson, Christine Mer, Philippe Bergonzo, Pavel Hubik and Jozef Kristofik |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | Science and Technology of Advanced Materials, Vol 7, Iss S1, p S41 (2006) |
| Druh dokumentu: | article |
| ISSN: | 1468-6996 1878-5514 |
| Popis: | In this work, we report on superconductivity (SC) found in thin B-doped nanocrystalline diamond films, prepared by the PE-CVD technique. The thickness of the films varies from about 100 to 400 nm, the films are grown on low-alkaline glass at substrate temperatures of about 500–700 °C. The SIMS measurements show that films can be heavily doped with boron in concentrations in the range of 3×1021 cm−3. The Raman spectra show Fano resonances, confirming the substitutional B-incorporation. The low temperature magnetotransport measurements reveal a positive magnetoresistance. The SC transition is observed at about Tc=1.66 K. A simple theory exploiting the concept of weak localization accounting for this transition is proposed. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|