Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/138037
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dc.contributor.authorMa, Qiongen_US
dc.contributor.authorLui, Chun Hungen_US
dc.contributor.authorSong, Justin Chien Wenen_US
dc.contributor.authorLin, Yuxuanen_US
dc.contributor.authorKong, Jian Fengen_US
dc.contributor.authorCao, Yuanen_US
dc.contributor.authorDinh, Thao H.en_US
dc.contributor.authorNair, Nityan L.en_US
dc.contributor.authorFang, Wenjingen_US
dc.contributor.authorWatanabe, Kenjien_US
dc.contributor.authorTaniguchi, Takashien_US
dc.contributor.authorXu, Su-Yangen_US
dc.contributor.authorKong, Jingen_US
dc.contributor.authorPalacios, Tomásen_US
dc.contributor.authorGedik, Nuhen_US
dc.contributor.authorGabor, Nathaniel M.en_US
dc.contributor.authorJarillo-Herrero, Pabloen_US
dc.date.accessioned2020-04-22T06:07:01Z-
dc.date.available2020-04-22T06:07:01Z-
dc.date.issued2018-
dc.identifier.citationMa, Q., Lui, C.H., Song, J.C.W., Lin, Y., Long, J. F., Cao, Y., . . . Jarillo-Herrero, P. (2019). Giant intrinsic photoresponse in pristine graphene. Nature Nanotechnology, 14(2), 145–150. doi:10.1038/s41565-018-0323-8en_US
dc.identifier.issn1748-3387en_US
dc.identifier.urihttps://hdl.handle.net/10356/138037-
dc.description.abstractWhen the Fermi level is aligned with the Dirac point of graphene, reduced charge screening greatly enhances electron-electron scattering1-5. In an optically excited system, the kinematics of electron-electron scattering in Dirac fermions is predicted to give rise to novel optoelectronic phenomena6-11. In this paper, we report on the observation of an intrinsic photocurrent in graphene, which occurs in a different parameter regime from all the previously observed photothermoelectric or photovoltaic photocurrents in graphene12-20: the photocurrent emerges exclusively at the charge neutrality point, requiring no finite doping. Unlike other photocurrent types that are enhanced near p-n or contact junctions, the photocurrent observed in our work arises near the edges/corners. By systematic data analyses, we show that the phenomenon stems from the unique electron-electron scattering kinematics in charge-neutral graphene. Our results not only highlight the intriguing electron dynamics in the optoelectronic response of Dirac fermions, but also offer a new scheme for photodetection and energy harvesting applications based on intrinsic, charge-neutral Dirac fermions.en_US
dc.description.sponsorshipNRF (Natl Research Foundation, S’pore)en_US
dc.language.isoenen_US
dc.relation.ispartofNature Nanotechnologyen_US
dc.rights© 2018 The Author(s). All rights reserved. This paper was published by Springer Nature Limited in Nature Nanotechnology and is made available with permission of The Author(s).en_US
dc.subjectScience::Physicsen_US
dc.titleGiant intrinsic photoresponse in pristine grapheneen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.contributor.organizationInstitute of High Performance Computing, A*STARen_US
dc.identifier.doi10.1038/s41565-018-0323-8-
dc.description.versionAccepted versionen_US
dc.identifier.pmid30559484-
dc.identifier.scopus2-s2.0-85058858137-
dc.identifier.issue2en_US
dc.identifier.volume14en_US
dc.identifier.spage145en_US
dc.identifier.epage150en_US
dc.subject.keywordsGrapheneen_US
dc.subject.keywordsElectronsen_US
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