Fig. 1: Proposed mechanism of spin-polarized CPC in multilayer 2H-MoTe2.
From: Circular photocurrents in centrosymmetric semiconductors with hidden spin polarization
a Crystal structures of 2H-MoTe2. b The right circular polarized light (σ+) excites spin down states at Kα valleys of α sector and Kβ valleys of β sector. c The spatial distribution of laser intensity for Gaussian beams. d Schematic diagram depicting the creation of a spin current induced by the intensity gradient of the Gaussian beam, subsequently converting into the circulating charge current. The gradient red region represents the distribution of spin polarization. The light blue arrows indicate the direction of pure spin current, while the black arrows represent the direction of charge current.
