TY - JOUR
T1 - Energy gap and surface structure of superconducting diamond films probed by scanning tunneling microscopy
AU - Nishizaki, Terukazu
AU - Takano, Yoshihiko
AU - Nagao, Masanori
AU - Takenouchi, Tomohiro
AU - Kawarada, Hiroshi
AU - Kobayashi, Norio
N1 - Funding Information:
This work was partly supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports, and Culture of Japan and by the CTC program under JSPS.
PY - 2007/9/1
Y1 - 2007/9/1
N2 - We have performed scanning tunneling microscopy/spectroscopy (STM/STS) experiments on (1 1 1)-oriented epitaxial films of heavily boron-doped diamond at T = 0.47 K. The STM topography shows two kinds of atomic structures: a hydrogenated 1 × 1 structure, C(1 1 1)1 × 1:H, and an amorphous structure. On the C(1 1 1)1 × 1:H region, the tunneling spectra show superconducting property with the energy gap Δ = 0.83 meV. The obtained gap ratio 2Δ/kBTc = 3.57 is consistent with the weak-coupling BCS theory.
AB - We have performed scanning tunneling microscopy/spectroscopy (STM/STS) experiments on (1 1 1)-oriented epitaxial films of heavily boron-doped diamond at T = 0.47 K. The STM topography shows two kinds of atomic structures: a hydrogenated 1 × 1 structure, C(1 1 1)1 × 1:H, and an amorphous structure. On the C(1 1 1)1 × 1:H region, the tunneling spectra show superconducting property with the energy gap Δ = 0.83 meV. The obtained gap ratio 2Δ/kBTc = 3.57 is consistent with the weak-coupling BCS theory.
KW - Boron-doped diamond film
KW - Energy gap
KW - Scanning tunneling microscopy/spectroscopy
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U2 - 10.1016/j.physc.2007.03.008
DO - 10.1016/j.physc.2007.03.008
M3 - Article
AN - SCOPUS:34548161808
SN - 0921-4534
VL - 460-462 I
SP - 210
EP - 211
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - SPEC. ISS.
ER -