Dresden 2020 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 67: Cold Atomic Gases and Superfluids

TT 67.8: Talk

Thursday, March 19, 2020, 18:15–18:30, HSZ 204

Surface chiral excitations in time-reversal broken crystals — •Claudio Benzoni — TUM, Munich, Germany

We have studied an elastic model analogous to the isotropic body but in which the dynamics is non-Newtonian. In the long-wavelength regime this gapless model exhibits non-linear dispersing Rayleigh excitations that propagate in a chiral fashion. We found out that the chirality of the surface waves is determined by an interplay between the elasticity and the term that violates time-reversal symmetry and not only by the sign of the latter. Three regimes have been identified. Realizations of this model can be in two-dimensional Wigner crystals and in gyroscopic metamaterials.