[RIKEN Lunch Seminar] Chiral Photocurrents and Terahertz Emission in Dirac and Weyl Materials

by Mr Sahal Kaushik (Stony Brook University)

Thursday 14 Feb 2019, 12:00 → 13:00 US/Eastern

2-160 (Bldg. 510)

Recently, chiral photocurrents have been observed in Weyl materials. We propose a new mechanism for photocurrents in Dirac materials in the presence of magnetic fields, that does not depend on any asymmetries of the crystal. This Chiral Magnetic Photocurrent would be an independent probe of the chiral anomaly. We also also discuss an observation of terahertz emission in the Weyl material TaAs with tunable ellipticity, due to chiral photocurrents induced by an ultrafast near infrared laser.