Spectroscopic Signatures for Interlayer Coupling in MoS 2 –WSe 2 van der Waals Stacking

Handle URI:
http://hdl.handle.net/10754/338590
Title:
Spectroscopic Signatures for Interlayer Coupling in MoS 2 –WSe 2 van der Waals Stacking
Authors:
Chiu, Ming-Hui; Li, Ming-Yang; Zhang, Wengjing; Hsu, Wei-Ting; Chang, Wen-Hao; Terrones, Mauricio; Terrones, Humberto; Li, Lain-Jong ( 0000-0002-4059-7783 )
Abstract:
Stacking of MoS2 and WSe2 monolayers is conducted by transferring triangular MoS2 monolayers on top of WSe2 monolayers, all grown by chemical vapor deposition (CVD). Raman spectroscopy and photoluminescence (PL) studies reveal that these mechanically stacked monolayers are not closely coupled, but after a thermal treatment at 300 degrees C, it is possible to produce van der Waals solids consisting of two interacting transition metal dichalcogenide (TMD) monolayers. The layer-number sensitive Raman out-of-plane mode A(1g)(2) for WSe2 (309 cm(-1)) is found sensitive to the coupling between two TMD monolayers. The presence of interlayer excitonic emissions and the changes in other intrinsic Raman modes such as E '' for MoS2 at 286 cm(-1) and A(1g)(2) for MoS2 at around 463 cm(-1) confirm the enhancement of the interlayer coupling.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Spectroscopic Signatures for Interlayer Coupling in MoS 2 –WSe 2 van der Waals Stacking 2014, 8 (9):9649 ACS Nano
Publisher:
American Chemical Society
Journal:
ACS Nano
Issue Date:
23-Sep-2014
DOI:
10.1021/nn504229z
Type:
Article
ISSN:
1936-0851; 1936-086X
Additional Links:
http://pubs.acs.org/doi/abs/10.1021/nn504229z
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorChiu, Ming-Huien
dc.contributor.authorLi, Ming-Yangen
dc.contributor.authorZhang, Wengjingen
dc.contributor.authorHsu, Wei-Tingen
dc.contributor.authorChang, Wen-Haoen
dc.contributor.authorTerrones, Mauricioen
dc.contributor.authorTerrones, Humbertoen
dc.contributor.authorLi, Lain-Jongen
dc.date.accessioned2015-01-20T06:28:47Z-
dc.date.available2015-01-20T06:28:47Z-
dc.date.issued2014-09-23en
dc.identifier.citationSpectroscopic Signatures for Interlayer Coupling in MoS 2 –WSe 2 van der Waals Stacking 2014, 8 (9):9649 ACS Nanoen
dc.identifier.issn1936-0851en
dc.identifier.issn1936-086Xen
dc.identifier.doi10.1021/nn504229zen
dc.identifier.urihttp://hdl.handle.net/10754/338590en
dc.description.abstractStacking of MoS2 and WSe2 monolayers is conducted by transferring triangular MoS2 monolayers on top of WSe2 monolayers, all grown by chemical vapor deposition (CVD). Raman spectroscopy and photoluminescence (PL) studies reveal that these mechanically stacked monolayers are not closely coupled, but after a thermal treatment at 300 degrees C, it is possible to produce van der Waals solids consisting of two interacting transition metal dichalcogenide (TMD) monolayers. The layer-number sensitive Raman out-of-plane mode A(1g)(2) for WSe2 (309 cm(-1)) is found sensitive to the coupling between two TMD monolayers. The presence of interlayer excitonic emissions and the changes in other intrinsic Raman modes such as E '' for MoS2 at 286 cm(-1) and A(1g)(2) for MoS2 at around 463 cm(-1) confirm the enhancement of the interlayer coupling.en
dc.language.isoenen
dc.publisherAmerican Chemical Societyen
dc.relation.urlhttp://pubs.acs.org/doi/abs/10.1021/nn504229zen
dc.rightsArchived with thanks to ACS Nanoen
dc.subjectTransition metal dichalcogenidesen
dc.subjectTungsten diselenidesen
dc.subjectMolybdenum disulfideen
dc.subjectVan der Wall stackingen
dc.subjectHetero-junctionen
dc.subjectInter-layer couplingen
dc.titleSpectroscopic Signatures for Interlayer Coupling in MoS 2 –WSe 2 van der Waals Stackingen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalACS Nanoen
dc.eprint.versionPost-printen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorLi, Lain-Jongen
kaust.authorChiu, Ming-Huien
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