Shockley-Ramo theorem and long-range photocurrent response in gapless materials

Abstract

Scanning photocurrent maps of gapless materials, such as graphene, often exhibit complex patterns of hot spots positioned far from current-collecting contacts. We develop a general framework that helps to explain the unusual features of the observed patterns, such as the directional effect and the global character of photoresponse. We show that such a response is captured by a simple Shockley-Ramo-type approach. We examine specific examples and show that the photoresponse patterns can serve as a powerful tool to extract information about symmetry breaking, inhomogeneity, chirality, and other local characteristics of the system.

7 pgs, 3 fgs

References in corpus (4)

• Control over topological insulator photocurrents with light polarization
• Giant Nonlocality near the Dirac Point in Graphene
• Carrier Recombination and Generation Rates for Intravalley and Intervalley Phonon Scattering in Graphene
• Origins of Nonlocality near the Dirac Point in Graphene

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