TY - JOUR
T1 - Size-dependent superconductivity of Pb islands under magnetic fields studied by low-temperature scanning tunneling microscopy/spectroscopy
AU - Nishio, Takahiro
AU - Ono, Masanori
AU - Eguchi, Toyoaki
AU - Sakata, Hideaki
AU - Hasegawa, Yukio
PY - 2007/10/12
Y1 - 2007/10/12
N2 - Using a low-temperature scanning tunneling microscope, we investigated the superconducting gap of single-crystalline Pb islands, approximately 100nm in diameter with 11-13 monolayers (3-4nm) in thickness, under magnetic fields. The superconducting gap was observed under magnetic fields up to 2.2 T, higher than the critical field of bulk Pb. The critical fields of the Pb islands were evaluated from the magnetic field dependence of the zero-bias conductances. We found that the critical field depends on the volume V of the Pb islands as V1/2.
AB - Using a low-temperature scanning tunneling microscope, we investigated the superconducting gap of single-crystalline Pb islands, approximately 100nm in diameter with 11-13 monolayers (3-4nm) in thickness, under magnetic fields. The superconducting gap was observed under magnetic fields up to 2.2 T, higher than the critical field of bulk Pb. The critical fields of the Pb islands were evaluated from the magnetic field dependence of the zero-bias conductances. We found that the critical field depends on the volume V of the Pb islands as V1/2.
KW - Pb
KW - Scanning tunneling microscopy
KW - Scanning tunneling spectroscopy
KW - Superconductivity
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U2 - 10.1143/JJAP.46.L880
DO - 10.1143/JJAP.46.L880
M3 - Article
AN - SCOPUS:36049016679
SN - 0021-4922
VL - 46
SP - L880-L882
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
IS - 36-40
ER -