To the Phenomenological theory of Avalanche-Like Effect in Dc-Biased Microwave Nonlinear HTS Transmission Line

Melnyk, Sergiy; Melnyk, S. S.; Lavrinovich, A. A.; Cherpak, M. T.

doi:10.15407/ujpe64.10.962

Cited by 3 publications

References 9 publications

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Catastrophe theory in the phenomenological description of the avalanche effect in dc-biased microwave HTSC transmission lines

Melnyk

Lavrinovich

et al. 2020

Low Temperature Physics

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Within the framework of the proposed generalization of the phenomenological model of a microwave nonlinear HTSC transmission line, the effects of direct current on the transmission line are studied. Taking into account the next term in the expansion of the nonlinear dependence of the resistance on current allows us to explain the anomalous dependence of the insertion loss on the input power level observed in the experiment at subcritical temperatures. An additional direct current through the microwave waveguide can lead to the appearance of a bifurcation region in the space of control parameters. This is manifested in the possibility of an abrupt change in the properties of the waveguide at the boundaries of this region and the transition of the HTSC waveguide to a strongly dissipative state. The qualitative correspondence of the properties of the generalized phenomenological model to the data of experimental studies of the HTSC coplanar waveguide is obtained.

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Catastrophe theory in the phenomenological description of the avalanche effect in dc-biased microwave HTSC transmission lines

Melnyk

Lavrinovich

et al. 2020

Low Temperature Physics

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Possibilities of Numerical Modeling of Nonlinear Phenomena in HTSC Waveguide Lines

Melnyk

2020

2020 IEEE Ukrainian Microwave Week (UkrMW)

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On kinetics of superconducting state destruction in a nonlinear coplanar waveguide based on a high-temperature superconductor film

Lavrinovich¹,

Cherpak²

2021

RADIOFIZ. ELEKTRON.

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Subject and Purpose. The mechanism of destruction of the S-state of a nonlinear high-temperature superconductor as part of a coplanar waveguide has not been properly elucidated as the effect of avalanche-type transition to a highly dissipative state, which was experimentally detected by the authors, takes place. The present work is concerned with the development of an appropriate approach describing kinetics of destruction of the S-state of a nonlinear high-temperature superconductor in a coplanar waveguide with allowances made for an inhomogeneous distribution of the microwave current in the superconducting film strip. Methods and Methodology. Use of I.B. and O.G. Vendiks’ reasoning [2] is made on kinetics of the destruction of the superconducting state of a wide film when a direct current governed by the time-dependent Ginzburg-Landau equation is applied. Keeping unchanged their idea as to the S–N boundary forming in the film strip with the boundary movement to the middle of the strip, the S–N boundary motion equation is obtained for a coplanar waveguide, proceeding in doing this from the motion equation of magnetic flux vortices under certain restrictions specified. Results. The time of S-state destruction has been numerically estimated: 1) for a wide superconducting film of YBa2Cu3O7–d composition, the destruction is by the direct current and 2) for a coplanar waveguide based on the same film, the destruction is by the microwave current. When the superconductivity is small (I / I c ³ 1), the destruction time values in both cases are close to each other within the order of magnitude. Conclusion. It is for the first time that the S-state destruction time in a coplanar waveguide has been expressed in terms of the microwave current distribution in the waveguide. It has been shown that this characteristic linearly depends on the ratio between the critical current and the microwave current amplitude in contrast to a quadratic dependence obtained for a superconducting strip with a direct current.

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To the Phenomenological theory of Avalanche-Like Effect in Dc-Biased Microwave Nonlinear HTS Transmission Line

Cited by 3 publications

References 9 publications

Catastrophe theory in the phenomenological description of the avalanche effect in dc-biased microwave HTSC transmission lines

Catastrophe theory in the phenomenological description of the avalanche effect in dc-biased microwave HTSC transmission lines

Possibilities of Numerical Modeling of Nonlinear Phenomena in HTSC Waveguide Lines

On kinetics of superconducting state destruction in a nonlinear coplanar waveguide based on a high-temperature superconductor film

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