Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Metal-insulator transition and superconductivity in boron-doped diamond
Show others and affiliations
2007 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 75, no 16, 165313- p.Article in journal (Refereed) Published
Abstract [en]

We report on a detailed analysis of the transport properties and superconducting critical temperatures of boron-doped diamond films grown along the {100} direction. The system presents a metal-insulator transition (MIT) for a boron concentration (n(B)) on the order of n(c)similar to 4.5x10(20) cm(-3), in excellent agreement with numerical calculations. The temperature dependence of the conductivity and Hall effect can be well described by variable range hopping for n(B)< n(c) with a characteristic hopping temperature T-0 strongly reduced due to the proximity of the MIT. All metallic samples (i.e., for n(B)>n(c)) present a superconducting transition at low temperature. The zero-temperature conductivity sigma(0) deduced from fits to the data above the critical temperature (T-c) using a classical quantum interference formula scales as sigma(0)proportional to(n(B)/n(c)-1)(nu) with nu similar to 1. Large T-c values (>= 0.4 K) have been obtained for boron concentration down to n(B)/n(c)similar to 1.1 and T-c surprisingly mimics a (n(B)/n(c)-1)(1/2) law. Those high T-c values can be explained by a slow decrease of the electron-phonon coupling parameter lambda and a corresponding drop of the Coulomb pseudopotential mu(*) as n(B)-> n(c).

Place, publisher, year, edition, pages
2007. Vol. 75, no 16, 165313- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-37052DOI: 10.1103/PhysRevB.75.165313ISI: 000246075900047Scopus ID: 2-s2.0-34247343361OAI: oai:DiVA.org:kth-37052DiVA: diva2:431917
Available from: 2011-07-27 Created: 2011-07-27 Last updated: 2017-12-08Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Authority records BETA

Persson, Clas

Search in DiVA

By author/editor
Persson, Clas
By organisation
Materials Science and Engineering
In the same journal
Physical Review B. Condensed Matter and Materials Physics
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 32 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf