Adjustment of self-heating in long superconducting thin film NbN microbridges
Artikel i vetenskaplig tidskrift, 2012

The self-heating in long superconducting microbridges made from thin NbN films deposited on top of high silicon mesa structures was studied by analyzing the hysteresis current density j(H). We observed a more than twofold decrease of j(H) with increase in the ratio of the height of the Si mesa, h, to the width of the microbridge, W, from 0 to 24. We describe our experimental results using one-dimensional thermal balance equations taking into account disordered matter in our thin NbN films and limitations imposed on the phonon mean free path by the width of the Si mesa. In the framework of this model we obtain a good agreement between theory and experiment over a wide temperature range from 4.2 K up to the critical temperature T-C for all h/W ratios.

silicon

waves

hot-electron bolometer

Författare

A. Stockhausen

Karlsruher Institut für Technologie (KIT)

K. Il'in

Karlsruher Institut für Technologie (KIT)

M. Siegel

Karlsruher Institut für Technologie (KIT)

Ulf Södervall

Chalmers, Mikroteknologi och nanovetenskap (MC2), Nanotekniklaboratoriet

Piotr Jedrasik

Chalmers, Mikroteknologi och nanovetenskap (MC2), Nanotekniklaboratoriet

A. Semenov

Deutsches Zentrums für Luft- und Raumfahrt (DLR)

Heinz-Wilhelm Hübers

Deutsches Zentrums für Luft- und Raumfahrt (DLR)

Superconductor Science and Technology

0953-2048 (ISSN) 1361-6668 (eISSN)

Vol. 25

Ämneskategorier

Fysik

DOI

10.1088/0953-2048/25/3/035012