1. Linear and nonlinear flux-flow behaviors in superconducting hot-electron bolometer mixers
- Author
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Feiming Li, Yan Delorme, Jia-Qiang Zhong, Sheng-Cai Shi, Wen Zhang, Yuan Ren, Hao Gao, Wei Miao, and Kangmin Zhou
- Subjects
010302 applied physics ,Superconductivity ,Resistive touchscreen ,Niobium nitride ,Materials science ,Physics and Astronomy (miscellaneous) ,Condensed matter physics ,Terahertz radiation ,Bolometer ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Instability ,Magnetic field ,law.invention ,Vortex ,chemistry.chemical_compound ,chemistry ,law ,Condensed Matter::Superconductivity ,0103 physical sciences ,0210 nano-technology - Abstract
We study experimentally the resistive behaviors of a niobium nitride superconducting hot-electron bolometer (HEB) device driven by magnetic field and terahertz radiation. We find that the resistance of the superconducting HEB device emerges due to time-dependent changes of the macroscopic quantum phase by flux-flow events. The flux-flow resistance is found to be increased linearly with magnetic field at low vortex velocities and is enhanced by terahertz radiation. At high vortex velocities, there is an obvious non-linear change, which can be well interpreted by viscous flux-flow instability predicted by the Larkin and Ovchinnikov theory. In addition, we demonstrate a technique taking use of the device resistance dependence on magnetic field to stabilize the superconducting HEB device.
- Published
- 2021
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