Nanometre-sized inhomogeneity in high-Jc Bi2Sr 2CaCu2O8+δ superconductors

M. Nishiyama; G. Kinoda; Y. Zhao; T. Hasegawa; Y. Itoh; N. Koshizuka; M. Murakami

doi:10.1088/0953-2048/17/12/008

Nanometre-sized inhomogeneity in high-J_c Bi₂Sr ₂CaCu₂O_8+δ superconductors

M. Nishiyama, G. Kinoda, Y. Zhao, T. Hasegawa, Y. Itoh, N. Koshizuka, M. Murakami

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6 Citations (Scopus)

Abstract

We have performed atomic-scale high-resolution scanning tunnelling microscopy and spectroscopy measurements on the cleaved surface of single crystal Bi₂Sr₂CaCuO_8+δ superconductors with high critical current density J_c. 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 J_c values in the Bi₂Sr₂CaCu_8+δ crystals.

Original language	English
Pages (from-to)	1406-1410
Number of pages	5
Journal	Superconductor Science and Technology
Volume	17
Issue number	12
DOIs	https://doi.org/10.1088/0953-2048/17/12/008
Publication status	Published - 2004 Dec 1

ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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10.1088/0953-2048/17/12/008

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abstract = "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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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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Nanometre-sized inhomogeneity in high-J_c Bi₂Sr ₂CaCu₂O_8+δ superconductors

Abstract

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