Axial Gauge Fields in Laser Irradiated 3D Dirac Semimetals*

Floquet engineering has become a powerful tool for understanding laser induced coherent phenomena in quantum materials[1]. It is noticed that an artificial axial gauge field (also known as chiral gauge field) can be realized[2] when emergent Floquet Weyl points appear in the Floquet spectrum[3]. Here, we concentrate on 3D Dirac semimetals irradiated by circularly polarized laser fields which lead to a Floquet Weyl pair. By utilzing the envelope profile of the laser field and considering the skin effect from the semimetal surface, nonzero axial electric and magnetic fields can be achieved. In this talk, we focus on physical consequences from the axial fields such as generation of currents and spectral features, and discuss their possible experimental signatures[4].