PT Journal
AU Shcherbatenko, M
   Tretyakov, I
   Lobanov, Y
   Maslennikov, SN
   Kaurova, N
   Finkel, M
   Voronov, B
   Goltsman, G
   Klapwijk, TM
TI Nonequilibrium interpretation of DC properties of NbN superconducting hot electron bolometers
SO Appl. Phys. Lett.
PY 2016
BP 132602
VL 109
IS 13
DI 10.1063/1.4963691
DE HEB mixer; contacts
AB We present a physically consistent interpretation of the dc electrical properties of niobiumnitride (NbN)-based superconducting hot-electron bolometer mixers, using concepts of nonequilibrium superconductivity. Through this, we clarify what physical information can be extracted from the resistive transition and the dc current-voltage characteristics, measured at suitably chosen temperatures, and relevant for device characterization and optimization. We point out that the intrinsic spatial variation of the electronic properties of disordered superconductors, such as NbN, leads to a variation from device to device.
ER