Inhomogeneous superconductivity in deeply underdoped Bi2Sr2CaCu2O8+δ

被引：2

作者：

Yamada, Y ^{[1
]}

Suzuki, M ^{[1
]}

机构：

[1] Kyoto Univ, Dept Elect Sci & Engn, Nishikyo Ku, Kyoto 6158510, Japan

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2005年 / 426卷

关键词：

interlayer tunneling spectroscopy; inhomogeneity;

D O I：

10.1016/j.physc.2005.02.047

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

To study electronic states in deeply underdoped cuprates, we have measured the interlayer tunneling spectra of Bi2Sr2CaCu2O8+delta (T-c = 44 K) realized by partially substituting Sr with La. A mesa structure is manufactured which is composed of 10 or less stacked intrinsic tunnel Josephson junctions. The tunneling characteristics exhibits a totally unknown behavior that the differential conductance increases significantly with decreasing temperature below Tc. This anomalous behavior observed only for deeply underdoped samples strongly suggest that inhomogeneous superconductivity or phase separation in CuO2 planes is essential bulk property of deeply underdoped cuprates. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：364 / 368

页数：5

共 12 条

[1] Mobility of the doped holes and the antiferromagnetic correlations in underdoped high-Tc cuprates -: art. no. 017001 [J].

Ando, Y ;

Lavrov, AN ;

Komiya, S ;

Segawa, K ;

Sun, XF .

PHYSICAL REVIEW LETTERS, 2001, 87 (01) :1-017001

[2] Extended-range short-pulse interlayer tunneling spectroscopy for Bi2Sr2CaCu2O8+δ intrinsic Josephson junctions [J].

Hamatani, T ;

Anagawa, K ;

Watanabe, T ;

Suzuki, M .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2003, 390 (02) :89-94

[3] Electronic liquid-crystal phases of a doped Mott insulator [J].

Kivelson, SA ;

Fradkin, E ;

Emery, VJ .

NATURE, 1998, 393 (6685) :550-553

[4] INTRINSIC JOSEPHSON EFFECTS IN HIGH-T-C SUPERCONDUCTORS [J].

KLEINER, R ;

MULLER, P .

PHYSICAL REVIEW B, 1994, 49 (02) :1327-1341

[5] Evidence for coexistence of the superconducting gap and the pseudogap in Bi-2212 from intrinsic tunneling spectroscopy [J].

Krasnov, VM ;

Yurgens, A ;

Winkler, D ;

Delsing, P ;

Claeson, T .

PHYSICAL REVIEW LETTERS, 2000, 84 (25) :5860-5863

[6] Imaging the granular structure of high-Tc superconductivity in underdoped Bi2Sr2CaCu2O8+δ [J].

Lang, KM ;

Madhavan, V ;

Hoffman, JE ;

Hudson, EW ;

Eisaki, H ;

Uchida, S ;

Davis, JC .

NATURE, 2002, 415 (6870) :412-416

[7] Discriminating the superconducting gap from the pseudogap in Bi2Sr2CaCu2O8+δ by interlayer tunneling spectroscopy [J].

Suzuki, M ;

Watanabe, T .

PHYSICAL REVIEW LETTERS, 2000, 85 (22) :4787-4790

[8] Interlayer tunneling spectroscopy for slightly overdoped Bi2Sr2CaCu2O8+δ [J].

Suzuki, M ;

Watanabe, T ;

Matsuda, A .

PHYSICAL REVIEW LETTERS, 1999, 82 (26) :5361-5364

[9] Anisotropic resistivities of precisely oxygen controlled single-crystal Bi2Sr2CaCu2O8+delta: Systematic study on ''spin gap'' effect [J].

Watanabe, T ;

Fujii, T ;

Matsuda, A .

PHYSICAL REVIEW LETTERS, 1997, 79 (11) :2113-2116

[10]

Wolf E. L., 1985, Principles of Electron Tunneling Spectroscopy

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