Shockley-Ramo theorem and long-range photocurrent response in gapless materials
Name
PhysRevB.90.075415.pdf
Size
559.24 KB
Format
Adobe PDF
Checksum (MD5)
bf4a15b090e94443615fa4b563cfb921
Author(s)
Song, Justin Chien Wen
Levitov, Leonid
Date Issued
August 2014
Journal
Physical Review B
Publisher
American Physical Society
Citation
Song, Justin C. W., and Leonid S. Levitov. "Shockley-Ramo theorem and long-range photocurrent response in gapless materials." Phys. Rev. B 90, 075415 (August 2014). © 2014 American Physical Society
Version
Final published version
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 formalism 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 this behavior is captured by a simple Shockley-Ramo-type framework. 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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevB.90.075415
