Stationary phase-kink states and dynamical phase transitions controlled by surface impedance in THz wave emission from intrinsic Josephson junctions

Abstract

As possible states to characterize THz wave emission from intrinsic Josephson junctions without external fields, the McCumber-like state and $\pi$-phase-kink state have been proposed. In the present article it is numerically shown that both states are stationary according to the bias current $J$ and surface impedance $Z$. The McCumber-like state is stable for low $J$ and small $Z$. For higher $J$, the $\pi$-phase-kink state accompanied with symmetry breaking along the c axis is stable even for Z=1, though strong emission in the vicinity of cavity resonance points only takes place for larger $Z$. Different emission behaviors for Z=1 and 10 are precisely compared. The dynamical phase diagram for $1\le Z\le 10$ and the optimal value of $Z$ for the strongest emission are also evaluated.

4 pages, 8 figures, RevTeX

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Cited by in corpus (11)

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• Phase dynamics of inductively coupled intrinsic Josephson junctions and terahertz electromagnetic radiation
• Hot-spot formation in stacks of intrinsic Josephson junctions in Bi2Sr2CaCu2O8
• Thermal and electromagnetic properties of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_8$ intrinsic Josephson junction stacks studied via one-dimensional coupled sine-Gordon equations
• Terahertz field control of interlayer transport modes in cuprate superconductors
• Terahertz Radiation Power Characterization and Optimization of Stack of Intrinsic Josephson Junctions
• Kink State in a Stack of Intrinsic Josephson Junctions in Layered High-$T_c$ Superconductors and Terahertz Radiation
• High Power and Wideband Terahertz Modulator Using c-Axis Current Controlled Layered Superconductors
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