Current-induced vortex unbinding in bolometer mixers | Zendy

R. Barends | Zendy; M. Hajenius | Zendy; J. R. Gao | Zendy; T. M. Klapwijk | Zendy

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Current-induced vortex unbinding in bolometer mixers

Author(s) -

R. Barends,

M. Hajenius,

J. R. Gao,

T. M. Klapwijk

Publication year - 2005

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.2158510

Subject(s) - bolometer , resistive touchscreen , current (fluid) , biasing , vortex , physics , condensed matter physics , voltage , noise (video) , bandwidth (computing) , optoelectronics , optics , electrical engineering , mechanics , detector , quantum mechanics , computer science , telecommunications , artificial intelligence , image (mathematics) , thermodynamics , engineering

We present a description of the current-voltage characteristics of hot electron bolometers in terms of the current-dependent intrinsic resistive transition of NbN films. We find that, by including this current dependence, we can correctly predict the complete current-voltage characteristics, showing excellent agreement with measurements for both low and high bias and for small as well as large devices. It is assumed that the current dependence is due to vortex-antivortex unbinding as described in the Berezinskii–Kosterlitz–Thouless theory. The presented approach will be useful in guiding device optimization for noise and bandwidth

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