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TT: Fachverband Tiefe Temperaturen

TT 62: Ultrafast Dynamics of Light-Driven Systems

TT 62.2: Vortrag

Freitag, 31. März 2023, 09:45–10:00, HSZ 03

Probing the superconducting transition in a cuprate superconductor by multi-dimensional terahertz spectroscopy — •Albert Liu¹, Danica Pavicevic¹, Michael Fechner¹, Pedro Lozano², Genda Gu², and Andrea Cavalleri^1,3 — ¹Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany — ²Brookhaven National Laboratory, New York, USA — ³Oxford University, Oxford, UK

We develop two-dimensional terahertz spectroscopy in both a non-collinear and reflection geometry. We demonstrate the technique by distilling the terahertz optical response of a superconducting plasma into its constituent nonlinearities, up to fifth-order. Subsequent measurements at temperatures approaching and crossing the phase transition reveal a phase-disordering transition in lieu of a BCS transition. An outlook for probing light-induced superconducting states will be provided.