Observation of gap anisotropy in YBa2Cu3O7−δ by tunneling

J. S. Tsai; I. Takeuchi; J. Fujita; T. Yoshitake; S. Miura; S. Tanaka; T. Terashima; Y. Bando; K. Iijima; K. Yamamoto

doi:10.1016/0921-4534(88)90333-4

Observation of gap anisotropy in YBa₂Cu₃O_7−δ by tunneling

J. S. Tsai, I. Takeuchi, J. Fujita, T. Yoshitake, S. Miura, S. Tanaka, T. Terashima, Y. Bando, K. Iijima, K. Yamamoto

Research output: Contribution to journal › Article › peer-review

55 Citations (Scopus)

Abstract

Superconductive energy gap of YBa₂Cu₃O_7−δ are measured in anovel broken film edge junction. (001), (103) and (110) oriented films are broken in a cryogenic environment along the appropriate directions together with the SrTiO₃ substrate. Pb electrode is brought close in situ to the clean broken film edge. The normalized energy gap 2Δ(0)/k_BT_c measured in the direction along and perpendicular to the Cu-O plane are found to be 5.9±0.2 and 3.6±0.2 respectively. These values are independent of the variation in the values of T_c within the examined range of 40K∽90K.

Original language	English
Pages (from-to)	1385-1386
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	153-155
DOIs	https://doi.org/10.1016/0921-4534(88)90333-4
Publication status	Published - 1988 Jan 1
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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abstract = "Superconductive energy gap of YBa2Cu3O7−δ are measured in anovel broken film edge junction. (001), (103) and (110) oriented films are broken in a cryogenic environment along the appropriate directions together with the SrTiO3 substrate. Pb electrode is brought close in situ to the clean broken film edge. The normalized energy gap 2Δ(0)/kBTc measured in the direction along and perpendicular to the Cu-O plane are found to be 5.9±0.2 and 3.6±0.2 respectively. These values are independent of the variation in the values of Tc within the examined range of 40K∽90K.",

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AU - Tsai, J. S.

AU - Takeuchi, I.

AU - Fujita, J.

AU - Yoshitake, T.

AU - Miura, S.

AU - Tanaka, S.

AU - Terashima, T.

AU - Bando, Y.

AU - Iijima, K.

AU - Yamamoto, K.

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AB - Superconductive energy gap of YBa2Cu3O7−δ are measured in anovel broken film edge junction. (001), (103) and (110) oriented films are broken in a cryogenic environment along the appropriate directions together with the SrTiO3 substrate. Pb electrode is brought close in situ to the clean broken film edge. The normalized energy gap 2Δ(0)/kBTc measured in the direction along and perpendicular to the Cu-O plane are found to be 5.9±0.2 and 3.6±0.2 respectively. These values are independent of the variation in the values of Tc within the examined range of 40K∽90K.

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