English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Recent experiments with strong THz fields in unconventional cupratessuperconductors have clearly evidenced an increase of the non-linear opticalresponse below the superconducting critical temperature Tc. As in the case ofconventional superconductors, a theoretical estimate of the various effectscontributing to the non-linear response is needed in order to interpret theexperimental findings. Here we report a detailed quantitative analysis of thenon-linear THz optical kernel in cuprates within a realistic model, accountingfor the band structure and disorder level appropriate for these systems. Weshow that the BCS quasiparticle response is the dominant contribution forcuprates, and its polarization dependence accounts very well for thethird-harmonic generation measurements. On the other hand, the polarizationdependence of the THz Kerr effect is only partly captured by our calculations,suggesting the presence of additional effects when the system is probed usinglight pulses with different central frequencies.

THz non-linear optical response in cuprates: predominance of the BCS response over the Higgs mode