Journal article
Quantized circular photogalvanic effect in Weyl semimetals.
- Abstract:
- The circular photogalvanic effect (CPGE) is the part of a photocurrent that switches depending on the sense of circular polarization of the incident light. It has been consistently observed in systems without inversion symmetry and depends on non-universal material details. Here we find that in a class of Weyl semimetals (for example, SrSi2) and three-dimensional Rashba materials (for example, doped Te) without inversion and mirror symmetries, the injection contribution to the CPGE trace is effectively quantized in terms of the fundamental constants e, h, c and with no material-dependent parameters. This is so because the CPGE directly measures the topological charge of Weyl points, and non-quantized corrections from disorder and additional bands can be small over a significant range of incident frequencies. Moreover, the magnitude of the CPGE induced by a Weyl node is relatively large, which enables the direct detection of the monopole charge with current techniques.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
Actions
Authors
- Publisher:
- Nature Publishing Group
- Journal:
- Nature Communications More from this journal
- Volume:
- 8
- Pages:
- 15995
- Publication date:
- 2017-07-01
- Acceptance date:
- 2017-05-18
- DOI:
- EISSN:
-
2041-1723
- Pmid:
-
28681840
- Language:
-
English
- Keywords:
- Pubs id:
-
pubs:708229
- UUID:
-
uuid:68b876d2-ddbf-4e95-92a7-a236e56a10ec
- Local pid:
-
pubs:708229
- Source identifiers:
-
708229
- Deposit date:
-
2017-08-22
Terms of use
- Copyright holder:
- de Juan Sanz et al
- Copyright date:
- 2017
- Notes:
- © The Author(s) 2017. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
- Licence:
- CC Attribution (CC BY)
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