Mainz 2026 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 18: Interaction with Strong or Short Laser Pulses I (joint session A/MO)

A 18.5: Vortrag

Mittwoch, 4. März 2026, 15:45–16:00, N 2

Photoinduced transient symmetry breaking and non-linear anomalous Hall responses in centrosymmetric 2D materials — •Arkajyoti Maity, Ulf Saalmann, and Jan-Michael Rost — Max Planck Institute for the Physics of Complex Systems, Dresden

We theoretically investigate the prospect of inducing a non-trivial, non-linear Hall response in Dirac materials obeying both inversion and time-reversal symmetries, specifically pristine graphene. This is possible by creating a non-thermal electronic distribution in the system by driving it with a finite duration ultrafast sub-cycle laser pulse. The resultant non-equilibrium state, generated by non-adiabatic transitions induced by the laser, can be made to break the general trigonal (C3) symmetry of the Hamiltonian and hence allow for a second-order Hall response to a weak electric probe, closely related to the quantum geometry of the system

Keywords: Ultrafast physics; Quantum geometry; Two dimensional materials; Anomalous Hall effect