THz spectroscopy of superconducting ultrathin films

Martin Dressel; Uwe S. Pracht; Eric Heintze; Marc Scheffler; Boris Gorshunov; Daniel Sherman; Aviad Frydman; Konstantin S. Ilin; Dagmar Henrich; Michael Siegel

doi:10.1109/irmmw-thz.2014.6956417

THz spectroscopy of superconducting ultrathin films

Martin Dressel, Uwe S. Pracht, Eric Heintze, Marc Scheffler, Boris Gorshunov, Daniel Sherman, Aviad Frydman, Konstantin S. Ilin, Dagmar Henrich, Michael Siegel

Department of Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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.

Original language	English
Title of host publication	2014 39th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2014
Publisher	IEEE Computer Society
ISBN (Electronic)	9781479938773
DOIs	https://doi.org/10.1109/irmmw-thz.2014.6956417
State	Published - 13 Nov 2014
Event	39th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2014 - Tucson, United States Duration: 14 Sep 2014 → 19 Sep 2014

Publication series

Name	International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
ISSN (Print)	2162-2027
ISSN (Electronic)	2162-2035

Conference

Conference	39th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2014
Country/Territory	United States
City	Tucson
Period	14/09/14 → 19/09/14

Bibliographical note

Publisher Copyright:
© 2014 IEEE.

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10.1109/irmmw-thz.2014.6956417

Cite this

Dressel, M., Pracht, U. S., Heintze, E., Scheffler, M., Gorshunov, B., Sherman, D., Frydman, A., Ilin, K. S., Henrich, D., & Siegel, M. (2014). THz spectroscopy of superconducting ultrathin films. In 2014 39th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2014 Article 6956417 (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz). IEEE Computer Society. https://doi.org/10.1109/irmmw-thz.2014.6956417

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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.",

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Dressel, M, Pracht, US, Heintze, E, Scheffler, M, Gorshunov, B, Sherman, D, Frydman, A, Ilin, KS, Henrich, D & Siegel, M 2014, THz spectroscopy of superconducting ultrathin films. in 2014 39th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2014., 6956417, International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz, IEEE Computer Society, 39th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2014, Tucson, United States, 14/09/14. https://doi.org/10.1109/irmmw-thz.2014.6956417

THz spectroscopy of superconducting ultrathin films. / Dressel, Martin; Pracht, Uwe S.; Heintze, Eric et al.
2014 39th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2014. IEEE Computer Society, 2014. 6956417 (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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Dressel M, Pracht US, Heintze E, Scheffler M, Gorshunov B, Sherman D et al. THz spectroscopy of superconducting ultrathin films. In 2014 39th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2014. IEEE Computer Society. 2014. 6956417. (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz). doi: 10.1109/irmmw-thz.2014.6956417

THz spectroscopy of superconducting ultrathin films

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