Interlayer tunneling spectroscopy and doping-dependent energy-gap structure of the trilayer superconductor Bi2Sr2Ca 2Cu3O10+δ

Yoshiharu Yamada, Kenkichi Anagawa, Takasada Shibauchi, Takenori Fujii, Takao Watanabe, Azusa Matsuda, Minoru Suzuki

研究成果: Article

47 引用 (Scopus)

抄録

The superconducting gap, the pseudogap, and their doping and temperature dependences have been measured by the short-pulse interlayer tunneling spectroscopy for the CuO2 triple-layer high-Tc superconducting Bi2Sr2Ca2Cu3O 10+δ system. It is found for a nearly optimally doped sample that the superconducting gap magnitude is ≈80 meV and the pseudogap is ≈120 meV, the values of which are slightly larger than those for CuO 2 double-layer system. Both gap magnitudes show a clear tendency to decrease with increasing doping. In an underdoped sample, a clear dip-and-hump structure is observed, which declines with increasing doping and tends to diminish in overdoped samples. The relationship between unchanged Tc and decreasing superconducting gap in the overdoped region is discussed in terms of the proximity effect applied to the inequivalent doping model. We also discuss the dip-and-hump structure in comparison with other spectroscopic results. Finally, we argue an important implication of the increasing maximum Josephson current and the decreasing superconducting gap magnitude, both with increasing doping.

元の言語English
記事番号054533
ページ(範囲)545331-5453311
ページ数4907981
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
68
発行部数5
出版物ステータスPublished - 2003 8
外部発表Yes

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Superconducting materials
interlayers
Energy gap
Doping (additives)
Spectroscopy
spectroscopy
tendencies
temperature dependence
pulses
Temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

これを引用

Interlayer tunneling spectroscopy and doping-dependent energy-gap structure of the trilayer superconductor Bi2Sr2Ca 2Cu3O10+δ . / Yamada, Yoshiharu; Anagawa, Kenkichi; Shibauchi, Takasada; Fujii, Takenori; Watanabe, Takao; Matsuda, Azusa; Suzuki, Minoru.

:: Physical Review B - Condensed Matter and Materials Physics, 巻 68, 番号 5, 054533, 08.2003, p. 545331-5453311.

研究成果: Article

Yamada, Yoshiharu ; Anagawa, Kenkichi ; Shibauchi, Takasada ; Fujii, Takenori ; Watanabe, Takao ; Matsuda, Azusa ; Suzuki, Minoru. / Interlayer tunneling spectroscopy and doping-dependent energy-gap structure of the trilayer superconductor Bi2Sr2Ca 2Cu3O10+δ :: Physical Review B - Condensed Matter and Materials Physics. 2003 ; 巻 68, 番号 5. pp. 545331-5453311.
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AU - Fujii, Takenori

AU - Watanabe, Takao

AU - Matsuda, Azusa

AU - Suzuki, Minoru

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