Optical properties of boron-doped diamond

Details Optical properties of boron-doped diamond Optical properties of boron-doped diamond

2005-08-23

arxiv.org/abs/cond-mat/0508540v2

Phys. Rev. B 73, 012501 (2006)

Physics

Condensed Matter

Superconductivity

5 figures, to be published in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.73.012501

We report optical reflectivity study on pure and boron-doped diamond films grown by a hot-filament chemical vapor deposition method. The study reveals the formation of an impurity band close to the top of the valence band upon boron-doping. A schematic picture for the evolution of the electronic structure with boron doping was drawn based on the experimental observation. The study also reveals that the boron doping induces local lattice distortion, which brings an infrared-forbidden phonon mode at 1330 cm$^{-1}$ activated in doped sample. The antiresonance characteristic of the mode in conductivity spectrum evidences the very strong coupling between electrons and this phonon mode.

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