TY  - ABST
AU  - Kitaygorsky, Jennifer
AU  - Komissarov, I.
AU  - Jukna, A.
AU  - Minaeva, O.
AU  - Kaurova, N.
AU  - Divochiy, A.
AU  - Korneev, A.
AU  - Tarkhov, M.
AU  - Voronov, B.
AU  - Milostnaya, I.
AU  - Gol'tsman, G.
AU  - Sobolewski, R.
PY  - 2007
DA  - 2007//
TI  - Fluctuations in two-dimensional superconducting NbN nanobridges and nanostructures meanders
T2  - Proc. APS March Meeting
BT  - Proc. APS March Meeting
SP  - L9.00013
VL  - 52
IS  - 1
AB  - We have observed fluctuations, manifested as sub-nanosecond to nanosecond transient, millivolt-amplitude voltage pulses, generated in two-dimensional NbN nanobridges, as well as in extended superconducting meander nanostructures, designed for single photon counting. Both nanobridges and nano-stripe meanders were biased at currents close to the critical current and measured in a range of temperatures from 1.5 to 8 K. During the tests, the devices were blocked from all incoming radiation by a metallic enclosure and shielded from any external magnetic fields. We attribute the observed spontaneous voltage pulses to the Kosterlitz-Thouless-type fluctuations, where the high enough applied bias current reduces the binding energy of vortex-antivortex pairs and, subsequently, thermal fluctuations break them apart causing the order parameter to momentarily reduce to zero, which in turn causes a transient voltage pulse. The duration of the voltage pulses depended on the device geometry (with the high-kinetic inductance meander structures having longer, nanosecond, pulses) while their rate was directly related to the biasing current as well as temperature.
UR  - https://meetings.aps.org/Meeting/MAR07/Event/59422
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=1027), last updated on Sun, 16 May 2021 16:40:15 -0500
ID  - Kitaygorsky_etal2007
ER  -