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Transient increase of the energy gap of superconducting NbN thin films excited by resonant narrow-band terahertz pulsesстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Beck M., Rousseau I., Klammer M., Leiderer P., Mittendorff M., Winnerl S., Helm M., Goltsman G.N., Demsar J.
- Журнал: Physical Review Letters
- Том: 110
- Номер: 267003
- Год издания: 2013
- Издательство: American Physical Society
- Местоположение издательства: United States
- DOI: 10.1103/PhysRevLett.110.267003
- Аннотация: Observations of radiation-enhanced superconductivity have thus far been limited to a few type-I superconductors (Al, Sn) excited at frequencies between the inelastic scattering rate and the superconducting gap frequency 2Δ/h. Utilizing intense, narrow-band, picosecond, terahertz pulses, tuned to just below and above 2Δ/h of a BCS superconductor NbN, we demonstrate that the superconducting gap can be transiently increased also in a type-II dirty-limit superconductor. The effect is particularly pronounced at higher temperatures and is attributed to radiation induced nonthermal electron distribution persisting on a 100 ps time scale.
- Добавил в систему: Гольцман Григорий Наумович