Electron transport properties of titanium nanowires were experimentally studied. Below the effective diameter ≲ 50 nm all samples demonstrated a pronounced broadening of the R(T) dependencies, which cannot be accounted for thermal flcutuations. An extensive microscopic and elemental analysis indicates the absence of structural or/and geometrical imperfection capable to broaden the the R(T) transition to such an extent. We associate the effect with quantum flucutuations of the order parameter.
@article{arxiv.1106.3852,
title = {Evidence of quantum phase slip effect in titanium nanowires},
author = {Janne Lehtinen and Timo Sajavaara and Konstantin Arutyunov and Alexander Vasiliev},
journal= {arXiv preprint arXiv:1106.3852},
year = {2015}
}