Physical Properties of SuperconductivityNo Access

DOPING DEPENDENCE OF SUPERCONDUCTING GAP IN Bi₂Sr_2-xLa_xCuO_6+δ (x = 0.2, 0.4, 0.6)

T. MACHIDA

Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan

Search for more papers by this author

Y. KAMIJO

Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan

Search for more papers by this author

T. KATO

Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan

Search for more papers by this author

K. HARADA

Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan

Search for more papers by this author

R. SAITO

Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan

Search for more papers by this author

T. NOGUCHI

Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan

Search for more papers by this author

, and

H. SAKATA

Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan

Search for more papers by this author

https://doi.org/10.1142/S0217979207044251Cited by:1 (Source: Crossref)

Abstract

We observed the distribution of the superconducting gap in Bi₂Sr_2-xLa_xCuO_6+δ (Bi2201-La) by scanning tunneling spectroscopy at x = 0.2 (over doped), 0.4 (optimally doped) and 0.6 (under doped). The superconducting gap was spatially distributed in all samples. As the carrier concentration is reduced, the distribution became much broader and the mean value of superconducting gap, Δ_mean increased. We found that the distribution and Δ_mean in Bi2201-La grew more rapidly than in Bi₂Sr₂CaCu₂O_8+δ with decreasing the carrier concentration.

Keywords:

You currently do not have access to the full text article.
Recommend the journal to your library today!

References

H. Nameki, M. Kikuchi and Y. Syono, Physica C 206, 227 (1993), DOI: 10.1016/0921-4534(93)90519-V. Web of Science, ADS, Google Scholar
S. Ono and Y. Ando, Phys. Rev. B 67, 104512 (2003), DOI: 10.1103/PhysRevB.67.104512. Web of Science, Google Scholar
N. Miyakawaet al., Physica C 364–365, 475 (2001). Web of Science, ADS, Google Scholar
A. Yurgenset al., Phys. Rev. Lett. 90, 147005 (2003), DOI: 10.1103/PhysRevLett.90.147005. Web of Science, ADS, Google Scholar
A. Sugimotoet al., Phys. Rev. B 74, 094503 (2006), DOI: 10.1103/PhysRevB.74.094503. Web of Science, Google Scholar
Y. Kamijo, T. Machida, N. Tsuji, K. Harada, R. Saito, T. Noguchi, T. Kato and H. Sakata, to be published in Physica C . Google Scholar
K. McElroyet al., Phys. Rev. Lett. 94, 197005 (2005), DOI: 10.1103/PhysRevLett.94.197005. Web of Science, Google Scholar