Josephson plasma in Bi2Sr2CaCu2O8+δ detected by Nb/AlOx/Nb junction

Y. Yamada; Y. Uematsu; Y. Mizugaki; Koji Nakajima; T. Yamashita

doi:10.1016/S0921-4534(01)00679-7

Josephson plasma in Bi2Sr2CaCu2O8+δ detected by Nb/AlOx/Nb junction

Y. Yamada, Y. Uematsu, Y. Mizugaki, Koji Nakajima, T. Yamashita

Research Institute of Electrical Communication (RIEC)

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

1 Citation (Scopus)

Abstract

We fabricated Nb/AlO_x/Nb Josephson junctions on Bi₂Sr₂CaCu₂O_8+δ (BSCCO) single crystals to detect the Josephson plasma in BSCCO. A thin gold layer was employed between BSCCO and Nb/AlO_x/Nb to avoid interdiffusion of oxygen in BSCCO. We measured the current-voltage properties of the Nb/AlO_x/Nb junctions in a liquid helium bath, and observed clear periodic step structures. A characteristic frequency corresponding to the voltage spacing of the steps was 63 GHz, which agreed with the Josephson plasma frequency of BSCCO. The result indicates that the Josephson plasma in BSCCO can interact with the ac Josephson current of the closely coupled Nb/AlO_x/Nb Josephson junctions.

Original language	English
Pages (from-to)	244-246
Number of pages	3
Journal	Physica C: Superconductivity and its applications
Volume	362
Issue number	1-4
DOIs	https://doi.org/10.1016/S0921-4534(01)00679-7
Publication status	Published - 2001 Sep 1

Keywords

BiSrCaCuO
Josephson junction
Josephson plasma
Nb/AlO/Nb
Resonance

ASJC Scopus subject areas

Condensed Matter Physics

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@article{b0354b0d188741569f2c015f5bd2ed68,

title = "Josephson plasma in Bi2Sr2CaCu2O8+δ detected by Nb/AlOx/Nb junction",

abstract = "We fabricated Nb/AlOx/Nb Josephson junctions on Bi2Sr2CaCu2O8+δ (BSCCO) single crystals to detect the Josephson plasma in BSCCO. A thin gold layer was employed between BSCCO and Nb/AlOx/Nb to avoid interdiffusion of oxygen in BSCCO. We measured the current-voltage properties of the Nb/AlOx/Nb junctions in a liquid helium bath, and observed clear periodic step structures. A characteristic frequency corresponding to the voltage spacing of the steps was 63 GHz, which agreed with the Josephson plasma frequency of BSCCO. The result indicates that the Josephson plasma in BSCCO can interact with the ac Josephson current of the closely coupled Nb/AlOx/Nb Josephson junctions.",

keywords = "BiSrCaCuO, Josephson junction, Josephson plasma, Nb/AlO/Nb, Resonance",

author = "Y. Yamada and Y. Uematsu and Y. Mizugaki and Koji Nakajima and T. Yamashita",

year = "2001",

month = sep,

day = "1",

doi = "10.1016/S0921-4534(01)00679-7",

language = "English",

volume = "362",

pages = "244--246",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier",

number = "1-4",

}

TY - JOUR

T1 - Josephson plasma in Bi2Sr2CaCu2O8+δ detected by Nb/AlOx/Nb junction

AU - Yamada, Y.

AU - Uematsu, Y.

AU - Mizugaki, Y.

AU - Nakajima, Koji

AU - Yamashita, T.

PY - 2001/9/1

Y1 - 2001/9/1

N2 - We fabricated Nb/AlOx/Nb Josephson junctions on Bi2Sr2CaCu2O8+δ (BSCCO) single crystals to detect the Josephson plasma in BSCCO. A thin gold layer was employed between BSCCO and Nb/AlOx/Nb to avoid interdiffusion of oxygen in BSCCO. We measured the current-voltage properties of the Nb/AlOx/Nb junctions in a liquid helium bath, and observed clear periodic step structures. A characteristic frequency corresponding to the voltage spacing of the steps was 63 GHz, which agreed with the Josephson plasma frequency of BSCCO. The result indicates that the Josephson plasma in BSCCO can interact with the ac Josephson current of the closely coupled Nb/AlOx/Nb Josephson junctions.

AB - We fabricated Nb/AlOx/Nb Josephson junctions on Bi2Sr2CaCu2O8+δ (BSCCO) single crystals to detect the Josephson plasma in BSCCO. A thin gold layer was employed between BSCCO and Nb/AlOx/Nb to avoid interdiffusion of oxygen in BSCCO. We measured the current-voltage properties of the Nb/AlOx/Nb junctions in a liquid helium bath, and observed clear periodic step structures. A characteristic frequency corresponding to the voltage spacing of the steps was 63 GHz, which agreed with the Josephson plasma frequency of BSCCO. The result indicates that the Josephson plasma in BSCCO can interact with the ac Josephson current of the closely coupled Nb/AlOx/Nb Josephson junctions.

KW - BiSrCaCuO

KW - Josephson junction

KW - Josephson plasma

KW - Nb/AlO/Nb

KW - Resonance

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U2 - 10.1016/S0921-4534(01)00679-7

DO - 10.1016/S0921-4534(01)00679-7

M3 - Article

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VL - 362

SP - 244

EP - 246

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

IS - 1-4

ER -