Dynamical Breaking of Charge Neutrality in Intrinsic Josephson Junctions: Common Origin for Microwave Resonant Absorptions and Multiple-Branch Structures in the IV Characteristics

M. Machida, T. Koyama, and M. Tachiki
Phys. Rev. Lett. 83, 4618 – Published 29 November 1999
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Abstract

We demonstrate that both microwave resonant absorptions and multiple-branch structures in the IV characteristics observed in intrinsic Josephson junctions are caused by the dynamical breaking of the charge neutrality inside the atomic-scale superconducting layers. The Lagrangian for the time-dependent Lawrence-Doniach model incorporating the charge neutrality breaking effect is proposed. On the basis of the Lagrangian, the longitudinal collective Josephson plasma mode is proved to exist. The branching behaviors in the IV curves are almost completely reproduced by careful numerical simulations for the model equation derived from the Lagrangian.

  • Received 19 March 1999

DOI:https://doi.org/10.1103/PhysRevLett.83.4618

©1999 American Physical Society

Authors & Affiliations

M. Machida

  • CCSE, Japan Atomic Energy Research Institute, 2-2-54 Nakameguro, Meguro-ku Tokyo 153-0061, Japan

T. Koyama

  • Institute for Materials Research, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan

M. Tachiki

  • National Research Institute for Metals, Sengen 1-2-1, Tsukuba, Ibaraki 305-0047, Japan

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Vol. 83, Iss. 22 — 29 November 1999

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