Ultrafast probes of electron–hole transitions between two atomic layers

Simple item page
dc.citation.articleNumber1859en_US
dc.citation.journalTitleNature Communicationsen_US
dc.citation.volumeNumber9en_US
dc.contributor.authorWen, Xiewenen_US
dc.contributor.authorChen, Hailongen_US
dc.contributor.authorWu, Tianminen_US
dc.contributor.authorYu, Zhihaoen_US
dc.contributor.authorYang, Qirongen_US
dc.contributor.authorDeng, Jingwenen_US
dc.contributor.authorLiu, Zhengtangen_US
dc.contributor.authorGuo, Xinen_US
dc.contributor.authorGuan, Jianxinen_US
dc.contributor.authorZhang, Xiangen_US
dc.contributor.authorGong, Yongjien_US
dc.contributor.authorYuan, Jiangtanen_US
dc.contributor.authorZhang, Zhuhuaen_US
dc.contributor.authorYi, Chongyueen_US
dc.contributor.authorGuo, Xuefengen_US
dc.contributor.authorAjayan, Pulickel M.en_US
dc.contributor.authorZhuang, Weien_US
dc.contributor.authorLiu, Zhirongen_US
dc.contributor.authorLou, Junen_US
dc.contributor.authorZheng, Junrongen_US
dc.date.accessioned2018-09-26T14:52:43Zen_US
dc.date.available2018-09-26T14:52:43Zen_US
dc.date.issued2018en_US
dc.description.abstractPhase transitions of electron-hole pairs on semiconductor/conductor interfaces determine fundamental properties of optoelectronics. To investigate interfacial dynamical transitions of charged quasiparticles, however, remains a grand challenge. By employing ultrafast mid-infrared microspectroscopic probes to detect excitonic internal quantum transitions and two-dimensional atomic device fabrications, we are able to directly monitor the interplay between free carriers and insulating interlayer excitons between two atomic layers. Our observations reveal unexpected ultrafast formation of tightly bound interlayer excitons between conducting graphene and semiconducting MoSe2. The result suggests carriers in the doped graphene are no longer massless, and an effective mass as small as one percent of free electron mass is sufficient to confine carriers within a 2D hetero space with energy 10 times larger than the room-temperature thermal energy. The interlayer excitons arise within 1 ps. Their formation effectively blocks charge recombination and improves charge separation efficiency for more than one order of magnitude.en_US
dc.identifier.citationWen, Xiewen, Chen, Hailong, Wu, Tianmin, et al.. "Ultrafast probes of electron–hole transitions between two atomic layers." <i>Nature Communications,</i> 9, (2018) Springer Nature: https://doi.org/10.1038/s41467-018-04291-9.en_US
dc.identifier.digitals41467-018-04291-9en_US
dc.identifier.doihttps://doi.org/10.1038/s41467-018-04291-9en_US
dc.identifier.urihttps://hdl.handle.net/1911/102716en_US
dc.language.isoengen_US
dc.publisherSpringer Natureen_US
dc.rightsThis 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/.en_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_US
dc.titleUltrafast probes of electron–hole transitions between two atomic layersen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
s41467-018-04291-9.pdf
Size:
3.22 MB
Format:
Adobe Portable Document Format
Download
Collections
Faculty Publications
Materials Science and NanoEngineering Publications