TY - JOUR
T1 - Core-level electronic structure evolution of heavily boron-doped superconducting diamond studied with hard x-ray photoemission spectroscopy
AU - Yokoya, T.
AU - Ikenaga, E.
AU - Kobata, M.
AU - Okazaki, H.
AU - Kobayashi, K.
AU - Takeuchi, A.
AU - Awaji, A.
AU - Takano, Y.
AU - Nagao, M.
AU - Sakaguchi, I.
AU - Takenouchi, T.
AU - Kobayashi, K.
AU - Kawarada, H.
AU - Oguchi, T.
PY - 2007/5/21
Y1 - 2007/5/21
N2 - Hard x-ray photoemission spectroscopy has been used to study intrinsic core-level electronic structure evolution of heavily boron-doped superconducting diamond films made with a microwave plasma-assisted chemical-vapor deposition method. The boron concentration dependent C 1s core-level spectra show systematic changes in the shift of the main peak and in the evolution of an additional feature at 1.1-1.3 eV lower binding energy than the main peak. In comparison to a low boron concentration nonsuperconducting diamond, the higher boron concentration doped diamond films show formation of several additional features in the B 1s core levels. Based on the present results, the local chemical environments around the doped boron atoms, the efficiency of hole doping by boron doping, and the implications for a recent x-ray absorption study are discussed.
AB - Hard x-ray photoemission spectroscopy has been used to study intrinsic core-level electronic structure evolution of heavily boron-doped superconducting diamond films made with a microwave plasma-assisted chemical-vapor deposition method. The boron concentration dependent C 1s core-level spectra show systematic changes in the shift of the main peak and in the evolution of an additional feature at 1.1-1.3 eV lower binding energy than the main peak. In comparison to a low boron concentration nonsuperconducting diamond, the higher boron concentration doped diamond films show formation of several additional features in the B 1s core levels. Based on the present results, the local chemical environments around the doped boron atoms, the efficiency of hole doping by boron doping, and the implications for a recent x-ray absorption study are discussed.
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U2 - 10.1103/PhysRevB.75.205117
DO - 10.1103/PhysRevB.75.205117
M3 - Article
AN - SCOPUS:34347326138
SN - 0163-1829
VL - 75
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
IS - 20
M1 - 205117
ER -