SKM 2023 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 12: Nonequilibrium Quantum Many-Body Systems I (joint session TT/DY)
DY 12.6: Hauptvortrag
Dienstag, 28. März 2023, 11:00–11:30, HSZ 204
Higgs spectroscopy of superconductors in nonequilibrium — •Dirk Manske — Max-Planck-Institut für Festkörperforschung
Higgs spectroscopy is a new and emergent field [1-3] that allows to classify and determine the superconducting order parameter by means of ultra-fast optical spectroscopy. There are two important ways to activate the Higgs mode in superconductors, namely a single-cycle *quench* or an adiabatic, multicycle *drive* pulse, which I will discuss in detail. Furthermore, I will review and report on the latest progress on Higgs spectroscopy, in particular on the role of the third-harmonic-generation (THG) [4-6] and the possible IR-activation of the Higgs mode by impurities or external dc current [7,8]. I also provide new predictions for time-resolved ARPES experiments in which, after a quench, a continuum of Higgs mode is observable and a phase information of the superconducting gap function would be possible to extract [9]. Finally, I show that the Higgs mode may shed some light on the 25-years-old A1g-puzzle in equilibrium Raman scattering on high-Tc cuprates [10].
[1] Nat. Commun. 11, 287 (2020)
[2] Phys. Rev. B 101, 184519 (2020)
[3] Nat. Commun. 11, 1793 (2020)
[4] Phys. Rev. B 104, 174508 (2021)
[5] Nature Commun., accepted (2022)
[6] Nature Commun., submitted (2022)
[7] Phys. Rev. B 101, 220507 (2020)
[8] Phys. Rev. B 104, 134504 (2021)
[9] Phys. Rev. B 101, 224510 (2020)
[10] Phys. Rev. Lett. 127, 197001 (2021)