Characterization of intrinsic Josephson junctions for La2-xSrxCuO4 single crystals

Y. Uematsu; Y. Mizugaki; K. Nakajima; T. Yamashita; S. Watauchi; I. Tanaka

doi:10.1016/S0921-4534(01)01036-X

Characterization of intrinsic Josephson junctions for La_2-xSr_xCuO₄ single crystals

Y. Uematsu, Y. Mizugaki, K. Nakajima, T. Yamashita, S. Watauchi, I. Tanaka

Research Institute of Electrical Communication (RIEC)

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

5 Citations (Scopus)

Abstract

We have fabricated c-axis micro-bridges of La_2-xSr_xCuO₄ (LSCO) single crystals in order to characterize the LSCO intrinsic Josephson junctions (IJJs). The current-voltage characteristics of the micro-bridges exhibited a large hysteresis with a voltage jump of the order 0.5-3 V and no multiple branching structures. A superconducting energy gap was clearly observed on the quasi-particle branch and showed BCS-like temperature dependence. In addition, the temperature dependence of the critical current of the IJJ was in good agreement with the theoretical curves for superconductor-insulator-superconductor (SIS) Josephson junctions. These results demonstrate that the IJJs of LSCO are characterized as stacked series SIS junctions.

Original language	English
Pages (from-to)	382-387
Number of pages	6
Journal	Physica C: Superconductivity and its applications
Volume	367
Issue number	1-4
DOIs	https://doi.org/10.1016/S0921-4534(01)01036-X
Publication status	Published - 2002 Feb 15

Keywords

Intrinsic Josephson effect
LaSrCuO

ASJC Scopus subject areas

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

Access to Document

10.1016/S0921-4534(01)01036-X

Cite this

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title = "Characterization of intrinsic Josephson junctions for La2-xSrxCuO4 single crystals",

abstract = "We have fabricated c-axis micro-bridges of La2-xSrxCuO4 (LSCO) single crystals in order to characterize the LSCO intrinsic Josephson junctions (IJJs). The current-voltage characteristics of the micro-bridges exhibited a large hysteresis with a voltage jump of the order 0.5-3 V and no multiple branching structures. A superconducting energy gap was clearly observed on the quasi-particle branch and showed BCS-like temperature dependence. In addition, the temperature dependence of the critical current of the IJJ was in good agreement with the theoretical curves for superconductor-insulator-superconductor (SIS) Josephson junctions. These results demonstrate that the IJJs of LSCO are characterized as stacked series SIS junctions.",

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T1 - Characterization of intrinsic Josephson junctions for La2-xSrxCuO4 single crystals

AU - Uematsu, Y.

AU - Mizugaki, Y.

AU - Nakajima, K.

AU - Yamashita, T.

AU - Watauchi, S.

AU - Tanaka, I.

PY - 2002/2/15

Y1 - 2002/2/15

N2 - We have fabricated c-axis micro-bridges of La2-xSrxCuO4 (LSCO) single crystals in order to characterize the LSCO intrinsic Josephson junctions (IJJs). The current-voltage characteristics of the micro-bridges exhibited a large hysteresis with a voltage jump of the order 0.5-3 V and no multiple branching structures. A superconducting energy gap was clearly observed on the quasi-particle branch and showed BCS-like temperature dependence. In addition, the temperature dependence of the critical current of the IJJ was in good agreement with the theoretical curves for superconductor-insulator-superconductor (SIS) Josephson junctions. These results demonstrate that the IJJs of LSCO are characterized as stacked series SIS junctions.

AB - We have fabricated c-axis micro-bridges of La2-xSrxCuO4 (LSCO) single crystals in order to characterize the LSCO intrinsic Josephson junctions (IJJs). The current-voltage characteristics of the micro-bridges exhibited a large hysteresis with a voltage jump of the order 0.5-3 V and no multiple branching structures. A superconducting energy gap was clearly observed on the quasi-particle branch and showed BCS-like temperature dependence. In addition, the temperature dependence of the critical current of the IJJ was in good agreement with the theoretical curves for superconductor-insulator-superconductor (SIS) Josephson junctions. These results demonstrate that the IJJs of LSCO are characterized as stacked series SIS junctions.

KW - Intrinsic Josephson effect

KW - LaSrCuO

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