@Article{Zolotov_etal2021,
author="Zolotov, P. I.
and Semenov, A. V.
and Divochiy, A. V.
and Goltsman, G. N.
and Romanov, N. R.
and Klapwijk, T. M.",
title="Dependence of photon detection efficiency on normal-state sheet resistance in marginally superconducting films of NbN",
journal="IEEE Trans. Appl. Supercond.",
year="2021",
volume="31",
number="5",
pages="1--5",
optkeywords="NbN SSPD; SNSPD",
abstract="We present an extensive set of data on nanowire-type superconducting single-photon detectors based on niobium-nitride (NbN) to establish the empirical correlation between performance and the normal-state resistance per square. We focus, in particular, on the bias current, compared to the expected depairing current, needed to achieve a near-unity detection efficiency for photon detection. The data are discussed within the context of a model in which the photon energy triggers the movement of vortices i.e. superconducting dissipation, followed by thermal runaway. Since the model is based on the non-equilibrium theory for conventional superconductors deviations may occur, because the efficient regime is found when NbN acts as a marginal superconductor in which long-range phase coherence is frustrated.",
optnote="exported from refbase (https://db.rplab.ru/refbase/show.php?record=1222), last updated on Mon, 03 May 2021 22:14:28 -0500",
issn="1051-8223",
doi="10.1109/TASC.2021.3061923",
opturl="https://ieeexplore.ieee.org/document/9362289/",
opturl="https://doi.org/10.1109/TASC.2021.3061923"
}