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Title: Intrinsic granularity in nanocrystalline boron-doped diamond films measured by scanning tunneling microscopy
Authors: Willems, B. L. ×
Dao, Vu Hung
Vanacken, Johan
Chibotaru, Liviu
Moshchalkov, Victor
Guillamon, I.
Suderow, H.
Vieira, S.
Janssens, S. D.
Williams, O. A.
Haenen, K.
Wagner, Patrick Hermann #
Issue Date: 21-Dec-2009
Publisher: Published by the American Physical Society through the American Institute of Physics
Series Title: Physical Review B, Condensed Matter and Materials Physics vol:80 issue:22
Article number: 224518
Abstract: We report on low-temperature scanning tunneling microscopy/spectroscopy experiments performed on superconducting boron-doped nanocrystalline diamond (NCD) thin films prepared by chemical-vapor deposition methods. The most representative sample reveals the observed superconducting gap (Δ) highly modulated over a length scale on the order of ∼30 nm, which is much shorter than the typical diamond grain size. The sample local and macroscopic behavior favors for the Δ modulation as being an intrinsic property of the NCD granules. On the other hand, Δ shows its temperature dependence [Δ(T)] consistent with the results obtained by Fominov and Feigel’man [Phys. Rev. B 63, 094518 (2001)], who studied theoretically the behavior of the superconducting gap of a BCS superconductor in contact with a normal layer by solving the one-dimensional Usadel equations on the superconducting side of the superconducting to normal interface.
URI: 
ISSN: 1098-0121
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Quantum Chemistry and Physical Chemistry Section
Solid State Physics and Magnetism Section
Soft Matter and Biophysics
× corresponding author
# (joint) last author

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