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L&M Seminar – Alexandra Landsman – High harmonic generation at metal-insulator interfaces 

September 5, 2023 @ 2:00 pm - 3:00 pm

Tuesday, 5th of September and 14:00, S7.06 

Alexandra Landsman, The Ohio State University

High harmonic generation at metal-insulator interfaces

Abstract:  

 We investigate the field-induced dielectric break-down at the Mott-insulator/metal interface using high harmonic generation, emitted when the interface is subjected to an ultrafast laser pulse. We show that the intensity of high harmonic emission correlates closely with doublon production and the corresponding loss of short-range anti-ferromagnetic order. For strong interlayer coupling, the harmonic intensity is defined by a phase transition between states that do not exist in a pure Mott insulator case. For weak interlayer coupling, the threshold for dielectric breakdown is considerably lowered due to the presence of a metallic layer. This suggests that interlayer coupling can be used as an additional knob to control magnetic insulator break-down, with implications for using Mott insulators as memristors in neuromorphic circuits.

Details

Date:
September 5, 2023
Time:
2:00 pm - 3:00 pm
Event Categories:
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Organiser

King’s Photonics & Nanotechnology Group

Venue

S7.06 Strand Campus
King's College London, Strand
London, WC2R 2LS United Kingdom
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