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Ultrafast band structure control of a two-dimensional heterostructure
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dc.contributor.author | Ulstrup, Søren | |
dc.contributor.author | Grubišić Čabo, Antonija | |
dc.contributor.author | Miwa, Jill A | |
dc.contributor.author | Riley, Jonathon Mark | |
dc.contributor.author | Grønborg, Signe S | |
dc.contributor.author | Johannsen, Jens C | |
dc.contributor.author | Cacho, Cephise | |
dc.contributor.author | Alexander, Oliver | |
dc.contributor.author | Chapman, Richard T | |
dc.contributor.author | Springate, Emma | |
dc.contributor.author | Bianchi, Mario | |
dc.contributor.author | Dendzik, Maciej | |
dc.contributor.author | Lauritsen, Jeppe V | |
dc.contributor.author | King, Philip David | |
dc.contributor.author | Hofmann, Philip | |
dc.date.accessioned | 2017-06-06T23:34:06Z | |
dc.date.available | 2017-06-06T23:34:06Z | |
dc.date.issued | 2016-06-28 | |
dc.identifier.citation | Ulstrup , S , Grubišić Čabo , A , Miwa , J A , Riley , J M , Grønborg , S S , Johannsen , J C , Cacho , C , Alexander , O , Chapman , R T , Springate , E , Bianchi , M , Dendzik , M , Lauritsen , J V , King , P D & Hofmann , P 2016 , ' Ultrafast band structure control of a two-dimensional heterostructure ' , ACS Nano , vol. 10 , no. 6 , pp. 6315-6322 . https://doi.org/10.1021/acsnano.6b02622 | en |
dc.identifier.issn | 1936-0851 | |
dc.identifier.other | PURE: 243285385 | |
dc.identifier.other | PURE UUID: 82449645-1bab-4527-a1e2-6a5a8d05f245 | |
dc.identifier.other | Scopus: 84976524970 | |
dc.identifier.other | WOS: 000378973700081 | |
dc.identifier.uri | https://hdl.handle.net/10023/10914 | |
dc.description.abstract | The electronic structure of two-dimensional (2D) semiconductors can be signicantly altered by screening effects, either from free charge carriers in the material itself, or by environmental screening from the surrounding medium. The physical properties of 2D semiconductors placed in a heterostructure with other 2D materials are therefore governed by a complex interplay of both intra- and inter-layer interactions. Here, using time- and angle-resolved photoemission, we are able to isolate both the layer-resolved band structure and, more importantly, the transient band structure evolution of a model 2D heterostructure formed of a single layer of MoS 2 on graphene. Our results reveal a pronounced renormalization of the quasiparticle gap of the MoS 2 layer. Following optical excitation, the band gap is reduced by up to ∼400 meV on femtosecond timescales due to a persistence of strong electronic interactions despite the environmental screening by the n-doped graphene. This points to a large degree of tuneability of both the electronic structure and electron dynamics for 2D semiconductors embedded in a van der Waals-bonded heterostructure. | |
dc.language.iso | eng | |
dc.relation.ispartof | ACS Nano | en |
dc.rights | © 2016, American Chemical Society. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at pubs.acs.org / https://dx.doi.org/10.1021/acsnano.6b02622 | en |
dc.subject | Ultrafast time- and angle-resolved photoemission | en |
dc.subject | Band gap renormalization | en |
dc.subject | 2D material heterostructures | en |
dc.subject | Graphene | en |
dc.subject | Transition metal dichalcogenides | en |
dc.subject | QC Physics | en |
dc.subject | TK Electrical engineering. Electronics Nuclear engineering | en |
dc.subject | DAS | en |
dc.subject.lcc | QC | en |
dc.subject.lcc | TK | en |
dc.title | Ultrafast band structure control of a two-dimensional heterostructure | en |
dc.type | Journal article | en |
dc.contributor.sponsor | The Royal Society | en |
dc.contributor.sponsor | EPSRC | en |
dc.contributor.sponsor | EPSRC | en |
dc.contributor.sponsor | BBSRC | en |
dc.description.version | Postprint | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.contributor.institution | University of St Andrews. Condensed Matter Physics | en |
dc.identifier.doi | https://doi.org/10.1021/acsnano.6b02622 | |
dc.description.status | Peer reviewed | en |
dc.date.embargoedUntil | 2017-06-06 | |
dc.identifier.grantnumber | UF120096 | en |
dc.identifier.grantnumber | EP/M023427/1 | en |
dc.identifier.grantnumber | EP/I031014/1 | en |
dc.identifier.grantnumber | BB/J019054/1 | en |
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