Change search
ReferencesLink to record
Permanent link

Direct link
Terahertz Radiation Driven Chiral Edge Currents in Graphene
Terahertz Center, University of Regensburg, Germany.
Terahertz Center, University of Regensburg, Germany.
Terahertz Center, University of Regensburg, Germany.
Terahertz Center, University of Regensburg, Germany.
Show others and affiliations
2011 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 107, no 27, 276601-1-276601-5 p.Article in journal (Refereed) Published
Abstract [en]

We observe photocurrents induced in single-layer graphene samples by illumination of the graphene edges with circularly polarized terahertz radiation at normal incidence. The photocurrent flows along the sample edges and forms a vortex. Its winding direction reverses by switching the light helicity from left to right handed. We demonstrate that the photocurrent stems from the sample edges, which reduce the spatial symmetry and result in an asymmetric scattering of carriers driven by the radiation electric field. The developed theory based on Boltzmann’s kinetic equation is in a good agreement with the experiment. We show that the edge photocurrents can be applied for determination of the conductivity type and the momentum scattering time of the charge carriers in the graphene edge vicinity.

Place, publisher, year, edition, pages
American Physical Society , 2011. Vol. 107, no 27, 276601-1-276601-5 p.
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-73582DOI: 10.1103/PhysRevLett.107.276601ISI: 000298609900010OAI: diva2:474707

Funding agencies|DFG| SPP 1459 GRK 1570 |EU-ConceptGraphene||IB of BMBF at DLR||RFBR||Russian Ministry of Education and Sciences||Dynasty Foundation-ICFPM||

Available from: 2012-01-09 Created: 2012-01-09 Last updated: 2014-10-09

Open Access in DiVA

fulltext(404 kB)192 downloads
File information
File name FULLTEXT01.pdfFile size 404 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Yakimova, Rositsa
By organisation
Semiconductor MaterialsThe Institute of Technology
In the same journal
Physical Review Letters
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 192 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 77 hits
ReferencesLink to record
Permanent link

Direct link