Tunneling measurements on superconductor/insulator/superconductor junctions using single-crystal YBa2Cu3O7-x thin films

K. Hirata; K. Yamamoto; K. Iijima; J. Takada; T. Terashima; Y. Bando; H. Mazaki

doi:10.1063/1.103311

Tunneling measurements on superconductor/insulator/superconductor junctions using single-crystal YBa₂Cu₃O_7-x thin films

K. Hirata, K. Yamamoto, K. Iijima, J. Takada, T. Terashima, Y. Bando, H. Mazaki

Faculty of Engineering

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

74 Citations (Scopus)

Abstract

We have, for the first time, made quasi-particle tunneling measurements on a YBa₂Cu₃O_7-x(001)/Y₂O₃ (001)/YBa₂ Cu₃ O_7-x (001)junction, which was epitaxially grown on a MgO(100) substrate in an in-situ process. Both layers of YBa₂ Cu₃ O_7-x showed the same superconducting transition of T_c end =86 K with ΔT(R=10-90%)=1.5 K. Quasi-particle tunneling in the direction perpendicular to the Cu-O planes was measured. A gap parameter Δ(4.5 K) of 9.0±0.2 meV and a value of 2Δ/kT_c of 3.5^+0.4_-0.6 were obtained.

Original language	English
Pages (from-to)	683-685
Number of pages	3
Journal	Applied Physics Letters
Volume	56
Issue number	7
DOIs	https://doi.org/10.1063/1.103311
Publication status	Published - 1990

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Tunneling measurements on superconductor/insulator/superconductor junctions using single-crystal YBa2Cu3O7-x thin films",

abstract = "We have, for the first time, made quasi-particle tunneling measurements on a YBa2Cu3O7-x(001)/Y2O3 (001)/YBa2 Cu3 O7-x (001)junction, which was epitaxially grown on a MgO(100) substrate in an in-situ process. Both layers of YBa2 Cu3 O7-x showed the same superconducting transition of Tc end =86 K with ΔT(R=10-90%)=1.5 K. Quasi-particle tunneling in the direction perpendicular to the Cu-O planes was measured. A gap parameter Δ(4.5 K) of 9.0±0.2 meV and a value of 2Δ/kTc of 3.5+0.4-0.6 were obtained.",

author = "K. Hirata and K. Yamamoto and K. Iijima and J. Takada and T. Terashima and Y. Bando and H. Mazaki",

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T1 - Tunneling measurements on superconductor/insulator/superconductor junctions using single-crystal YBa2Cu3O7-x thin films

AU - Hirata, K.

AU - Yamamoto, K.

AU - Iijima, K.

AU - Takada, J.

AU - Terashima, T.

AU - Bando, Y.

AU - Mazaki, H.

PY - 1990

Y1 - 1990

N2 - We have, for the first time, made quasi-particle tunneling measurements on a YBa2Cu3O7-x(001)/Y2O3 (001)/YBa2 Cu3 O7-x (001)junction, which was epitaxially grown on a MgO(100) substrate in an in-situ process. Both layers of YBa2 Cu3 O7-x showed the same superconducting transition of Tc end =86 K with ΔT(R=10-90%)=1.5 K. Quasi-particle tunneling in the direction perpendicular to the Cu-O planes was measured. A gap parameter Δ(4.5 K) of 9.0±0.2 meV and a value of 2Δ/kTc of 3.5+0.4-0.6 were obtained.

AB - We have, for the first time, made quasi-particle tunneling measurements on a YBa2Cu3O7-x(001)/Y2O3 (001)/YBa2 Cu3 O7-x (001)junction, which was epitaxially grown on a MgO(100) substrate in an in-situ process. Both layers of YBa2 Cu3 O7-x showed the same superconducting transition of Tc end =86 K with ΔT(R=10-90%)=1.5 K. Quasi-particle tunneling in the direction perpendicular to the Cu-O planes was measured. A gap parameter Δ(4.5 K) of 9.0±0.2 meV and a value of 2Δ/kTc of 3.5+0.4-0.6 were obtained.

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Tunneling measurements on superconductor/insulator/superconductor junctions using single-crystal YBa₂Cu₃O_7-x thin films

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