Full metadata record
DC Field | Value | Language |
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dc.contributor.author | Shinde, Sachin M. | - |
dc.contributor.author | Dhakal, Krishna P. | - |
dc.contributor.author | Chen, Xiang | - |
dc.contributor.author | Yun, Won Seok | - |
dc.contributor.author | Lee, Jae Dong | - |
dc.contributor.author | Kim, Hyun Min | - |
dc.contributor.author | Ahn, Jong-Hyun | - |
dc.date.available | 2018-03-19T09:36:21Z | - |
dc.date.created | 2018-03-13 | - |
dc.date.issued | 2018-02 | - |
dc.identifier.issn | 1884-4049 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.11750/6102 | - |
dc.description.abstract | The stacking order in layered transition-metal dichalcogenides (TMDCs) induces variations in the electronic and interlayer couplings. Therefore, controlling the stacking orientations when synthesizing TMDCs is desirable but remains a significant challenge. Here, we developed and showed the growth kinetics of different shapes and stacking orders in as-grown multi-stacked MoS2 crystals and revealed the stacking-order-induced interlayer separations, spin-orbit couplings (SOCs), and symmetry variations. Raman spectra in AA(A...)-stacked crystals demonstrated blueshifted out-of-plane (A(1g)) and in-plane (E-2g(1)) phonon frequencies, representing a greater reduction of the van der Waals gap compared to conventional AB(A.)-stacking. Our observations, together with first-principles calculations, revealed distinct excitonic phenomena due to various stacking orientations. As a result, the photoluminescence emission was improved in the AA(A...)-stacking configuration. Additionally, calculations showed that the valence-band maxima (VBM) at the K point of the AA(A...)-stacking configuration was separated into multiple sub-bands, indicating the presence of stronger SOC. We demonstrated that AA(A...)-stacking emitted an intense second-harmonic signal (SHG) as a fingerprint of the more augmented non-centrosymmetric stacking and enabled SOC-induced splitting at the VBM. We further highlighted the superiority of four-wave mixing-correlated SHG microscopy to quickly resolve the symmetries and multi-domain crystalline phases of differently shaped crystals. Our study based on crystals with different shapes and multiple stacking configurations provides a new avenue for development of future optoelectronic devices. | - |
dc.language | English | - |
dc.publisher | Nature Publishing Group | - |
dc.title | Stacking-controllable interlayer coupling and symmetric configuration of multilayered MoS2 | - |
dc.type | Article | - |
dc.identifier.doi | 10.1038/am.2017.226 | - |
dc.identifier.scopusid | 2-s2.0-85086326195 | - |
dc.identifier.bibliographicCitation | NPG Asia Materials, v.10, no.2, pp.1 - 13 | - |
dc.description.isOpenAccess | TRUE | - |
dc.subject.keywordPlus | MOLYBDENUM | - |
dc.subject.keywordPlus | SIGNATURES | - |
dc.subject.keywordPlus | GROWTH | - |
dc.subject.keywordPlus | VALLEY | - |
dc.subject.keywordPlus | SHAPE | - |
dc.subject.keywordPlus | WS2 | - |
dc.citation.endPage | 13 | - |
dc.citation.number | 2 | - |
dc.citation.startPage | 1 | - |
dc.citation.title | NPG Asia Materials | - |
dc.citation.volume | 10 | - |