2017/12/31 by Naveed Mehmood, Hamid Reza Rasouli, Onur Çakıroğlu +1 · 15 citations
Chemistry · Materials Science · Physics and Astronomy · #2D Materials and Applications #Chemistry #Condensed matter physics #Graphene research and applications #Materials science #Metal #Nanotechnology #Optoelectronics #Photoconductivity #Photocurrent #Photothermal therapy #Physics #Transition Metal Oxide Nanomaterials #Transition metal #cond-mat.mtrl-sci #physics.app-ph
paper · pdf · doi:10.1103/physrevb.97.195412
published in Physical review. B./Physical review. B 97(19) (American Physical Society)
arxiv created 2018/01/08 · openalex publication_date 2018/05/09 · arxiv updated 2018/05/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Photocurrent generation is unexpected in metallic 2D layered materials unless a photothermal mechanism is prevalent. Yet, typical high thermal conductivity and low absorption of the visible spectrum prevent photothermal current generation in metals. Here, we report photoresponse from two-terminal devices of mechanically exfoliated metallic 3R-NbS2 thin crystals using scanning photocurrent microscopy (SPCM) both at zero and finite bias. SPCM measurements reveal that the photocurrent predominantly emerges from metal/NbS2 junctions of the two-terminal device at zero bias. At finite biases, along with the photocurrent generated at metal/NbS2 junctions, now a negative photoresponse from all over the NbS2 crystal is evident. Among our results, we realized that the observed photocurrent can be explained by the local heating caused by the laser excitation. These findings show that NbS2 is among a few metallic materials in which photocurrent generation is possible.