TY - JOUR
T1 - Low-temperature STM/STS studies on boron-doped (1 1 1) diamond films
AU - Nishizaki, Terukazu
AU - Takano, Yoshihiko
AU - Nagao, Masanori
AU - Takenouchi, Tomohiro
AU - Kawarada, Hiroshi
AU - Kobayashi, Norio
N1 - Funding Information:
This study was partly supported by Iketani Science and Technology Foundation and by a Grant-in-Aid for Scientific Research from Japan Society for the Promotion of Science (JSPS) and the Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT).
PY - 2008/12
Y1 - 2008/12
N2 - We have performed scanning tunneling microscopy/spectroscopy (STM/STS) experiments on (1 1 1)-oriented epitaxial films of heavily boron-doped diamond (Tc∼5.4 K). We present that tunneling conductance spectra show temperature-dependent spatial variations. In the low-temperature region (T=0.47 K), the tunneling spectra do not show strong spatial dependence and a superconducting energy gap is observed independent of the surface morphology. In the high-temperature region (T=4.2 K), on the other hand, the tunneling conductance spectra show significant spatial dependence, indicating the inhomogeneous distribution of the superconducting property due to the distribution of boron atoms.
AB - We have performed scanning tunneling microscopy/spectroscopy (STM/STS) experiments on (1 1 1)-oriented epitaxial films of heavily boron-doped diamond (Tc∼5.4 K). We present that tunneling conductance spectra show temperature-dependent spatial variations. In the low-temperature region (T=0.47 K), the tunneling spectra do not show strong spatial dependence and a superconducting energy gap is observed independent of the surface morphology. In the high-temperature region (T=4.2 K), on the other hand, the tunneling conductance spectra show significant spatial dependence, indicating the inhomogeneous distribution of the superconducting property due to the distribution of boron atoms.
KW - A. Superconductors
KW - C. Scanning tunnelling microscopy (STM)
KW - D. Electronic structure
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U2 - 10.1016/j.jpcs.2008.06.011
DO - 10.1016/j.jpcs.2008.06.011
M3 - Article
AN - SCOPUS:57049116970
SN - 0022-3697
VL - 69
SP - 3027
EP - 3030
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
IS - 12
ER -