Journal
PHYSICAL REVIEW B
Volume 80, Issue 14, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.80.140506
Keywords
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Funding
- JSPS [20510121]
- JSPS
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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 Rapid Communication 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 <= Z <= 10 and the optimal value of Z for the strongest emission are also evaluated.
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