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dc.contributor.authorKim, J.
dc.contributor.authorHong, X.
dc.contributor.authorJin, C.
dc.contributor.authorShi, S.-F.
dc.contributor.authorChang, C.-Y. S.
dc.contributor.authorChiu, Ming-Hui
dc.contributor.authorLi, Lain-Jong
dc.contributor.authorWang, F.
dc.date.accessioned2015-01-20T05:58:47Z
dc.date.available2015-01-20T05:58:47Z
dc.date.issued2014-12-04
dc.identifier.citationUltrafast generation of pseudo-magnetic field for valley excitons in WSe2 monolayers 2014, 346 (6214):1205 Science
dc.identifier.issn0036-8075
dc.identifier.issn1095-9203
dc.identifier.pmid25477455
dc.identifier.doi10.1126/science.1258122
dc.identifier.urihttp://hdl.handle.net/10754/338569
dc.description.abstractThe valley pseudospin is a degree of freedom that emerges in atomically thin two-dimensional transition metal dichalcogenides (MX2). The capability to manipulate it, in analogy to the control of spin in spintronics, can open up exciting opportunities. Here, we demonstrate that an ultrafast and ultrahigh valley pseudo-magnetic field can be generated by using circularly polarized femtosecond pulses to selectively control the valley degree of freedom in monolayer MX2. Using ultrafast pump-probe spectroscopy, we observed a pure and valley-selective optical Stark effect in WSe2 monolayers from the nonresonant pump, resulting in an energy splitting of more than 10 milli-electron volts between the K and K′ valley exciton transitions. Our study opens up the possibility to coherently manipulate the valley polarization for quantum information applications.
dc.language.isoen
dc.publisherAmerican Association for the Advancement of Science (AAAS)
dc.relation.urlhttp://www.sciencemag.org/cgi/doi/10.1126/science.1258122
dc.relation.urlhttp://arxiv.org/abs/1407.2347
dc.rightsArchived with thanks to Science
dc.titleUltrafast generation of pseudo-magnetic field for valley excitons in WSe2 monolayers
dc.typeArticle
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalScience
dc.eprint.versionPost-print
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
dc.identifier.arxivid1407.2347
kaust.personLi, Lain-Jong
kaust.personChiu, Ming-Hui
dc.versionv1
refterms.dateFOA2018-06-13T12:43:20Z
dc.date.published-online2014-12-04
dc.date.published-print2014-12-05
dc.date.posted2014-07-09


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