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dc.contributor.authorTizei, Luiz H. G.
dc.contributor.authorLin, Yung-Chang
dc.contributor.authorLu, Ang-Yu
dc.contributor.authorLi, Lain-Jong
dc.contributor.authorSuenaga, Kazu
dc.date.accessioned2016-06-06T07:41:35Z
dc.date.available2016-06-06T07:41:35Z
dc.date.issued2016-04-21
dc.identifier.citationElectron energy loss spectroscopy of excitons in two-dimensional-semiconductors as a function of temperature 2016, 108 (16):163107 Applied Physics Letters
dc.identifier.issn0003-6951
dc.identifier.issn1077-3118
dc.identifier.doi10.1063/1.4947058
dc.identifier.urihttp://hdl.handle.net/10754/611772
dc.description.abstractWe have explored the benefits of performing monochromated Electron Energy Loss Spectroscopy(EELS) in samples at cryogenic temperatures. As an example, we have observed the excitonic absorption peaks in single layer Transition Metal Dichalcogenides. These peaks appear separated by small energies due to spin orbit coupling. We have been able to distinguish the split for MoS2 below 300 K and for MoSe2 below 220 K. However, the distinction between peaks is only clear at 150 K. We have measured the change in absorption threshold between 150 K and 770 K for MoS2 and MoSe2. We discuss the effect of carbon and ice contamination in EELSspectra. The increased spectral resolution available made possible with modern monochromators in electron microscopes will require the development of stable sample holders which reaches temperatures far below that of liquid nitrogen.
dc.language.isoen
dc.publisherAIP Publishing
dc.relation.urlhttp://scitation.aip.org/content/aip/journal/apl/108/16/10.1063/1.4947058
dc.rightsArchived with thanks to Applied Physics Letters
dc.titleElectron energy loss spectroscopy of excitons in two-dimensional-semiconductors as a function of temperature
dc.typeArticle
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalApplied Physics Letters
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionLaboratoire de Physique des Solides, Université Paris-Sud, CNRS-UMR 8502, Orsay 91405, France
dc.contributor.institutionNanotube Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8565, Japan
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personLu, Ang-Yu
kaust.personLi, Lain-Jong
refterms.dateFOA2017-04-21T00:00:00Z
dc.date.published-online2016-04-21
dc.date.published-print2016-04-18


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