Narrow carrier concentration range of superconductivity and critical point of pseudogap formation temperature in Pb-substituted Bi 2Sr 2CuO 6+δ

Kazutaka Kudo, Naoyuki Okumura, Yoshiyuki Miyoshi, Terukazu Nishizaki, Takahiko Sasaki, Norio Kobayashi

研究成果: Article査読

11 被引用数 (Scopus)

抄録

We have determined the precise T-p phase diagram of Pb-substituted Bi 2Sr 2CuO 6+δ by using the hole concentration p estimated from the Hall coefficient, and found that the superconducting region of Pb-substituted Bi 2Sr 2CuO 6+δ is rather narrow as compared with other Bi-based high-T c cuprates. In Bi-based single-layer high-T c cuprates, the width of the superconducting region becomes more narrow as the maximum T c (T c,max) gets smaller. This is different from other high-T csuperconductors, in which T c/T c,max is described by a universal function of p. Furthermore, we have found that the p dependence of the pseudogap formation temperature T *projects to zero at the critical point p cr < 0.205{0.21, which is outside the superconducting region of Pb-substituted Bi 2Sr 2CuO 6+δ. Taking into account that p cr of high-T c cuprates is commonly located around p ∼ 0.19{0.21, it is concluded that whether p cr is inside or outside the superconducting region simply depends on the width of the superconducting region.

本文言語English
論文番号084722
ジャーナルjournal of the physical society of japan
78
8
DOI
出版ステータスPublished - 2009 8

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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「Narrow carrier concentration range of superconductivity and critical point of pseudogap formation temperature in Pb-substituted Bi <sub>2</sub>Sr <sub>2</sub>CuO <sub>6+δ</sub>」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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