Tunneling Spectroscopy and Vortex Imaging in Boron-Doped Diamond

Abstract

We present the first scanning tunneling spectroscopy study of single-crystalline boron doped diamond. The measurements were performed below 100 mK with a low temperature scanning tunneling microscope. The tunneling density of states displays a clear superconducting gap. The temperature evolution of the order parameter follows the weak coupling BCS law with $\Delta (0)/k_B{T}_c\simeq 1.74$. Vortex imaging at low magnetic field also reveals localized states inside the vortex core that are unexpected for such a dirty superconductor.

4 pages, 4 figures, replaced with revised version

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• Enhanced superconducting gaps in the tri-layer high-$T_c$ cuprate Bi${}_2$Sr${}_2$Ca${}_2$Cu${}_3$O${}_{10+\delta }$
• Nanoscale superconducting properties of amorphous W-based deposits grown with focused-ion-beam
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• Specific heat and electronic states of superconducting boron-doped silicon carbide
• Observation of superconducting gap in boron-doped diamond by laser-excited photoemission spectroscopy
• Nanostructures made from superconducting boron doped diamond
• Fermion structure of non-Abelian vortices in high density QCD
• Spatially-Correlated Microstructure and Superconductivity in Polycrystalline Boron-Doped Diamond
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• Superconducting boron doped nanocrystalline diamond microwave coplanar resonator
• Multilayer Effects in Bi2Sr2Ca2Cu3O10+z Superconductors
• Large Microwave Inductance of Granular Boron-Doped Diamond Superconducting Films
• Influence of structural disorder and Coulomb interactions in the superconductor-insulator transition applied to boron doped diamond
• Vortex creation and control in the Kitaev spin liquid by local bond modulations