TY - JOUR
T1 - Nanometre-sized inhomogeneity in high-Jc Bi2Sr 2CaCu2O8+δ superconductors
AU - Nishiyama, M.
AU - Kinoda, G.
AU - Zhao, Y.
AU - Hasegawa, T.
AU - Itoh, Y.
AU - Koshizuka, N.
AU - Murakami, M.
PY - 2004/12/1
Y1 - 2004/12/1
N2 - We have performed atomic-scale high-resolution scanning tunnelling microscopy and spectroscopy measurements on the cleaved surface of single crystal Bi2Sr2CaCuO8+δ superconductors with high critical current density Jc. The samples exhibited rugged structure about 15 nm in period, larger than the modulation of the BiO layer, which corresponded well to the energy gap distribution at 77 K. The presence of inhomogeneity from a nanometre to a micrometre scale, in the energy gap distribution, the structural modulation and the chemical composition fluctuation, may play an important role in improving Jc values in the Bi2Sr2CaCu8+δ crystals.
AB - We have performed atomic-scale high-resolution scanning tunnelling microscopy and spectroscopy measurements on the cleaved surface of single crystal Bi2Sr2CaCuO8+δ superconductors with high critical current density Jc. The samples exhibited rugged structure about 15 nm in period, larger than the modulation of the BiO layer, which corresponded well to the energy gap distribution at 77 K. The presence of inhomogeneity from a nanometre to a micrometre scale, in the energy gap distribution, the structural modulation and the chemical composition fluctuation, may play an important role in improving Jc values in the Bi2Sr2CaCu8+δ crystals.
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U2 - 10.1088/0953-2048/17/12/008
DO - 10.1088/0953-2048/17/12/008
M3 - Article
AN - SCOPUS:10644253638
SN - 0953-2048
VL - 17
SP - 1406
EP - 1410
JO - Superconductor Science and Technology
JF - Superconductor Science and Technology
IS - 12
ER -