We demonstrate high-performance nanowire superconducting single photon detectors (SSPDs) on bN thin films grown at a temperature compatible with monolithic integration. NbN films ranging from 150 nm to 3 nm in thickness were deposited by dc magnetron sputtering on MgO substrates at 400 degrees C SSPDs were fabricated on high quality NbN films of different thickness (7 to 3 nm) deposited under o...

We propose a high mobility superconductor gate nMOSFET using undoped Si as the substrate. We have studied superconducting NbN gate nMOSFETs fabricated on p-type Si, undoped Si and n-type Si substrate, respectively. The nMOSFETs on undoped Si and n-type Si have operated properly at 4.2 K. The transconductance of nMOSFETs on undoped Si substrate is higher than that of nMOSFET on p-type Si. The di...

We characterize inductors fabricated from ultra-thin, approximately 100 nm wide strips of niobium (Nb) and niobium nitride (NbN). These nanowires have a large kinetic inductance in the superconducting state. The kinetic inductance scales linearly with the nanowire length, with a typical value of 1 nH µm(-1) for NbN and 44 pH µm(-1) for Nb at a temperature of 2.5 K. We measure the temperature an...

We have fabricated NbN/Au nanogaps and bridged them with an Al superconductor using Ti as interlayer. The nanodevices show a critical current density at 300 mK high $3\ifmmode\times\else\texttimes\fi{}{10}^{6}\phantom{\rule{4pt}{0ex}}{\text{A/cm}}^{2}$, which is $30%$ higher than that of nanowires the same lateral dimensions NbN-based devices. response function external magnetic field clearly s...

Improving the coherence of superconducting qubits is a fundamental step towards realization fault-tolerant quantum computation. However, times circuits made from conventional aluminium-based Josephson junctions are limited by presence microscopic two-level systems in amorphous aluminum oxide tunnel barriers. Here, we have developed based on NbN/AlN/NbN epitaxial silicon substrates which promise...

Citizen science plays an important role in observing the natural environment. While conventional citizen consists of organized campaigns to observe a particular phenomenon or species there are also many ad hoc observations environment social media. These data constitute valuable resource for ‘passive science’—the use media that unconnected any program, but represent untapped dataset ecological ...

Non-reciprocity in the critical current has been observed a variety of superconducting systems and called diode effect. The origin underlying effect depends on symmetry breaking mechanisms at play. We investigate micro bridges NbN also NbN/magnetic insulator (MI) hybrids. observe large efficiency $\approx$~30\% when an out-of-plane magnetic field as small 25~mT is applied. In both NbN/MI hybrid...