Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Submitted Manuscript

Publication Date

2018

Journal or Book Title

arXiv

Abstract

We investigate the interplay between gap oscillations and damping in the dynamics of supercon- ductors taken out of equilibrium by strong optical pulses with sub-gap Terahertz frequencies. A semi-phenomenological formalism is developed to include the damping within the electronic subsys- tem that arises from effects beyond BCS, such as interactions between Bogoliubov quasiparticles and decay of the Higgs mode. Such processes are conveniently expressed as T1 and T2 times in the standard pseudospin language for superconductors. Comparing with data on NbN that we report here, we argue that the superconducting dynamics in the picosecond time scale, after the pump is turned off, is governed by the T2 process.

Comments

This is a pre-print of Cui, Tianbai, Xu Yang, Chirag Vaswani, Jigang Wang, Rafael M. Fernandes, and Peter P. Orth. "Impact of damping on superconducting gap oscillations induced by ultra-strong Terahertz pulses." arXiv preprint arXiv:1802.09711 (2018).

Copyright Owner

The Authors

Language

en

File Format

application/pdf

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