Polarization dependence of the third-harmonic generation in multiband superconductors

Autor:	Cea, T., Barone, P., Castellani, C., Benfatto, L.
Rok vydání:	2017
Předmět:	Condensed Matter - Superconductivity
Zdroj:	Phys. Rev. B 97, 094516 (2018)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.97.094516
Popis:	In a superconductor the third-harmonic generation (THG) of a strong THz pulse is enhanced below Tc by the resonant excitation of lattice-modulated charge fluctuations (LCF), which modulate the response according to the polarization of the field. Here we compute the THG within a multiband model for the prototype NbN superconductor. We show that the non-resonant contribution coming from the instantaneous electronic response and the finite width of the pulse significantly suppress the polarization dependence of the signal, challenging its observation in real systems. Comment: Final version, as published
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1712.01006 Zobrazit plný text záznamu View this record from Arxiv