DC-assisted microwave quenching of YBa2Cu3O7-{\delta} coplanar waveguide to a highly dissipative state

TL;DR

This study investigates how microwave and direct current jointly induce a reversible transition to a highly dissipative state in YBa2Cu3O7-{ extdelta} based coplanar waveguides, likely due to self-heating effects.

Contribution

It demonstrates a controlled, reversible transition to a dissipative state in HTS CPWs under combined microwave and DC stimulation, highlighting the role of self-heating and flux flow.

Findings

Sharp, reversible transition to dissipative state observed.

Transition depends on input power, DC current, and temperature.

Self-heating and magnetic flux flow are key mechanisms.

Abstract

The paper reports on finding the effect of a strong change in the microwave losses in an HTS-based coplanar waveguide (CPW) at certain values of the input power Pin and direct current Idc. CPW on the basis of 150 nm thick YBa2Cu3O7-{\delta} epitaxial film on a single crystal MgO substrate was studied experimentally. A sharp and reversible transition of the CPW into a strongly dissipative state at the certain meanings of Pin and Idc depending on temperature was observed. Apparently the effect can be explained by self-heating of HTS structure caused by magnetic flux flow under the joint influence of MW and DC.