RF impedance of intrinsic Josephson junction in flux-flow state with a periodic pinning potential

Y. Yamada; K. Nakajima; Koji Nakajima

doi:10.1016/j.physc.2008.05.014

RF impedance of intrinsic Josephson junction in flux-flow state with a periodic pinning potential

Y. Yamada, K. Nakajima, Koji Nakajima

Research Institute of Electrical Communication (RIEC)

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

1 Citation (Scopus)

Abstract

We have investigated the dynamics of Josephson vortices interacting with electromagnetic waves in Bi₂Sr₂CaCu₂O_8+y intrinsic Josephson junction (IJJ) stacks by means of millimeter wave irradiation and numerical simulations based on coupled sine-Gordon equations while taking into account a sinusoidal form of the periodic pinning potential. The numerical simulation results for the influence of the electromagnetic waves on the flux-flow properties reveal that the periodic pinning potential induces the in-phase motion of Josephson vortices over the junctions. In order to prove from another viewpoint, we investigate RF impedance of IJJ in flux-flow state in this study. A remarkable negative real part region appears at 1st harmonic step, it means that the IJJ in flux-flow state acts as an oscillator at the negative real part region.

Original language	English
Pages (from-to)	1295-1297
Number of pages	3
Journal	Physica C: Superconductivity and its applications
Volume	468
Issue number	15-20
DOIs	https://doi.org/10.1016/j.physc.2008.05.014
Publication status	Published - 2008 Sept 15

Keywords

Flux-flow
Josephson junction
Simulation
Sine-Gordon equation
Vortex

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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10.1016/j.physc.2008.05.014

Cite this

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title = "RF impedance of intrinsic Josephson junction in flux-flow state with a periodic pinning potential",

abstract = "We have investigated the dynamics of Josephson vortices interacting with electromagnetic waves in Bi2Sr2CaCu2O8+y intrinsic Josephson junction (IJJ) stacks by means of millimeter wave irradiation and numerical simulations based on coupled sine-Gordon equations while taking into account a sinusoidal form of the periodic pinning potential. The numerical simulation results for the influence of the electromagnetic waves on the flux-flow properties reveal that the periodic pinning potential induces the in-phase motion of Josephson vortices over the junctions. In order to prove from another viewpoint, we investigate RF impedance of IJJ in flux-flow state in this study. A remarkable negative real part region appears at 1st harmonic step, it means that the IJJ in flux-flow state acts as an oscillator at the negative real part region.",

keywords = "Flux-flow, Josephson junction, Simulation, Sine-Gordon equation, Vortex",

author = "Y. Yamada and K. Nakajima and Koji Nakajima",

year = "2008",

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doi = "10.1016/j.physc.2008.05.014",

language = "English",

volume = "468",

pages = "1295--1297",

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

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publisher = "Elsevier",

number = "15-20",

}

TY - JOUR

T1 - RF impedance of intrinsic Josephson junction in flux-flow state with a periodic pinning potential

AU - Yamada, Y.

AU - Nakajima, K.

AU - Nakajima, Koji

PY - 2008/9/15

Y1 - 2008/9/15

N2 - We have investigated the dynamics of Josephson vortices interacting with electromagnetic waves in Bi2Sr2CaCu2O8+y intrinsic Josephson junction (IJJ) stacks by means of millimeter wave irradiation and numerical simulations based on coupled sine-Gordon equations while taking into account a sinusoidal form of the periodic pinning potential. The numerical simulation results for the influence of the electromagnetic waves on the flux-flow properties reveal that the periodic pinning potential induces the in-phase motion of Josephson vortices over the junctions. In order to prove from another viewpoint, we investigate RF impedance of IJJ in flux-flow state in this study. A remarkable negative real part region appears at 1st harmonic step, it means that the IJJ in flux-flow state acts as an oscillator at the negative real part region.

AB - We have investigated the dynamics of Josephson vortices interacting with electromagnetic waves in Bi2Sr2CaCu2O8+y intrinsic Josephson junction (IJJ) stacks by means of millimeter wave irradiation and numerical simulations based on coupled sine-Gordon equations while taking into account a sinusoidal form of the periodic pinning potential. The numerical simulation results for the influence of the electromagnetic waves on the flux-flow properties reveal that the periodic pinning potential induces the in-phase motion of Josephson vortices over the junctions. In order to prove from another viewpoint, we investigate RF impedance of IJJ in flux-flow state in this study. A remarkable negative real part region appears at 1st harmonic step, it means that the IJJ in flux-flow state acts as an oscillator at the negative real part region.

KW - Flux-flow

KW - Josephson junction

KW - Simulation

KW - Sine-Gordon equation

KW - Vortex

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JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 15-20

ER -

RF impedance of intrinsic Josephson junction in flux-flow state with a periodic pinning potential

Abstract

Keywords

ASJC Scopus subject areas

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