We studied the superconductor-insulator transition in very thin films of TiN (and NbN) at very
low temperature (T= 35 mK) as a function of sheet resistance and magnetic field. The critical …

By combining very low temperature scanning tunneling microscopy and spectroscopy on a
TiN film we have observed a nonuniform state comprising of superconducting (S) and …

Superconductivity in two dimensions has attracted renewed interest in the context of two-
dimensional (2D) van der Waals materials. Key questions remain regarding the nature and …

The origin of the intermediate anomalous metallic state in two-dimensional superconductor
materials remains enigmatic. In the present paper, we observe such a state in a series of∼ …

A scale for magnetic field resilience of a superconductor is set by the paramagnetic limit.
Comparing the condensation energy of the Bardeen–Cooper–Schrieffer (BCS) singlet …

The results of studies on superconductor–insulator transitions are reported for Mo and MoRu
films of varying thickness deposited on SiO underlayers and on bare glass. The film samples …

Nb and NbN cluster-assembled films were produced by a plasma–gas–condensation cluster
deposition apparatus and examined by transmission electron microscopy, electrical …

We report on thickness-tuned superconductor–insulator transitions in amorphous Bi films
quench-condensed onto underlayers of Ge, Sb, and SiO. Bi films on Ge and SiO have …

We report observations of the zero-field resistive transitions of superconducting quench-
condensed Bi 0.97 Tl 0.03 films both near electrically isolated normal-metal ground planes …

Superconductivity is observed in a composite of rhombohedral crystalline bismuth
nanoparticles imbedded in an insulating porous opal host via electrical transport and AC …