@inproceedings{e7f3ecba4a9f4434b94ee6e7f5ea5da0,
title = "THz spectroscopy of superconducting ultrathin films",
abstract = "Coherent-source THz spectroscopy was employed to measure the charge carrier dynamics and excitations of ultrathin superconducting films at low temperatures. While the properties of weakly disordered superconductors can be well described by the BCS theory, significant deviations are observed as disorder increases towards the superconductor-insulator transition. A comparative study including tunneling and optical spectroscopy reveals the importance of Coulomb interactions on the energy gap of disordered superconductors. We also discuss the possibility of collective low-frequency excitations due to the Higgs mode, which become long-lived and well defined in the vicinity of a quantum critical point.",
author = "Martin Dressel and Pracht, \{Uwe S.\} and Eric Heintze and Marc Scheffler and Boris Gorshunov and Daniel Sherman and Aviad Frydman and Ilin, \{Konstantin S.\} and Dagmar Henrich and Michael Siegel",
note = "Publisher Copyright: {\textcopyright} 2014 IEEE.; 39th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2014 ; Conference date: 14-09-2014 Through 19-09-2014",
year = "2014",
month = nov,
day = "13",
doi = "10.1109/IRMMW-THz.2014.6956417",
language = "English",
series = "International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz",
publisher = "IEEE Computer Society",
booktitle = "2014 39th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2014",
address = "United States",
}