Shockley-Ramo theorem and long-range photocurrent response in gapless materials
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 g...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
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American Physical Society
2014
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| Online Access: | http://hdl.handle.net/1721.1/89039 https://orcid.org/0000-0002-4268-731X |
| _version_ | 1826199967722635264 |
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| author | Song, Justin Chien Wen Levitov, Leonid |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Song, Justin Chien Wen Levitov, Leonid |
| author_sort | Song, Justin Chien Wen |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T11:28:58Z |
| format | Article |
| id | mit-1721.1/89039 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T11:28:58Z |
| publishDate | 2014 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/890392022-10-01T03:55:55Z Shockley-Ramo theorem and long-range photocurrent response in gapless materials Song, Justin Chien Wen Levitov, Leonid Massachusetts Institute of Technology. Department of Physics Song, Justin Chien Wen Levitov, Leonid 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. United States. Dept. of Energy. Center for Excitonics (Grant DE-SC0001088) 2014-08-25T18:48:07Z 2014-08-25T18:48:07Z 2014-08 2011-12 2014-08-19T22:00:03Z Article http://purl.org/eprint/type/JournalArticle 1098-0121 1550-235X http://hdl.handle.net/1721.1/89039 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 https://orcid.org/0000-0002-4268-731X en http://dx.doi.org/10.1103/PhysRevB.90.075415 Physical Review B 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. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Song, Justin Chien Wen Levitov, Leonid Shockley-Ramo theorem and long-range photocurrent response in gapless materials |
| title | Shockley-Ramo theorem and long-range photocurrent response in gapless materials |
| title_full | Shockley-Ramo theorem and long-range photocurrent response in gapless materials |
| title_fullStr | Shockley-Ramo theorem and long-range photocurrent response in gapless materials |
| title_full_unstemmed | Shockley-Ramo theorem and long-range photocurrent response in gapless materials |
| title_short | Shockley-Ramo theorem and long-range photocurrent response in gapless materials |
| title_sort | shockley ramo theorem and long range photocurrent response in gapless materials |
| url | http://hdl.handle.net/1721.1/89039 https://orcid.org/0000-0002-4268-731X |
| work_keys_str_mv | AT songjustinchienwen shockleyramotheoremandlongrangephotocurrentresponseingaplessmaterials AT levitovleonid shockleyramotheoremandlongrangephotocurrentresponseingaplessmaterials |