Fig. 1
From: Direct visualization of current-induced spin accumulation in topological insulators
Schematics of spin-dependent photovoltage generation and experimental setup. a Schematic of the device structure with bias current Jc applied along the x direction. The laser is focused on the device with normal incidence. b Optical image of the device with a representation of the electrical connections. Scale bar is 50 µm. The scanning area is indicated by a yellow box. The induced photovoltage is acquired by a lock-in amplifier
