A seminar series in condensed matter physics. The seminars take place every other Tuesday during the spring term.

Speaker: R. Matthias Geilhufe, Chalmers

Title of the lecture: "Chiral phono-magnetism"

See abstract below.

April

10:15 - 11:15

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Overview

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Date:Starts 11 April 2023, 10:15Ends 11 April 2023, 11:15
Location:
PJ seminar room
Language:English

Abstract:

High intensity THz lasers allow for the coherent excitation of individual phonon modes. The ultrafast control of emergent magnetism by means of phonons opens up new tuning mechanisms for functional materials. While theoretically predicted phonon magnetic moments are tiny, recent experiments hint towards a significant magnetization in various materials. I will give an introduction into chiral phono-magnetism and outline the current challenges in the field. Furthermore, I introduce a coupling mechanism between rotational degrees of freedom and the electron spin. This coupling introduces the transient level-splitting of spin-up and spin-down channels and a resulting magnetization.

[1] Geilhufe et al., Physical Review Research, 3, L022011, 2021

[2] Geilhufe, Physical Review Research, 4, L012004, 2022

[3] Geilhufe & Hergert, Physical Review B, 107, L020406, 2023