Higgs amplification in non-equilibrium K3C60

by Prof. Daniel Podolsky

Technion

at Condensed Matter Seminar

Mon, 11 Mar 2019, 11:30
Sacta-Rashi Building for Physics (54), room 207

Abstract

The quest for new functionalities in quantum materials has recently been extended to non-equilibrium states. In the context of superconductivity, examples have included the generation of transient superconductivity above the thermodynamic transition temperature, the excitation of coherent Higgs-mode oscillations, and the optical control of the interlayer phase in the cuprates. In this talk, I will propose that a prompt quench into a transient superconducting state from a metal induces large Higgs fluctuations of the order parameter, and will demonstrate that these fluctuations give rise to the amplification of light at frequencies below the superconducting gap. I will show new measurements on K3C60, in which these predictions are verified experimentally.

Created on 03-03-2019 by Meidan, Dganit (dganit)
Updaded on 04-03-2019 by Meidan, Dganit (dganit)