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  Momentum-resolved linear dichroism in bilayer MoS2

Volckaert, K., Rostami, H., Biswas, D., Marković, I., Andreatta, F., Sanders, C. E., et al. (2019). Momentum-resolved linear dichroism in bilayer MoS2. Physical Review B, 100(24): 241406, pp. 1-6. doi:10.1103/PhysRevB.100.241406.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-69E7-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-7050-2
Genre: Journal Article

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 Creators:
Volckaert, Klara1, Author
Rostami, Habib1, Author
Biswas, Deepnarayan1, Author
Marković, Igor2, Author              
Andreatta, Federico1, Author
Sanders, Charlotte E.1, Author
Majchrzak, Paulina1, Author
Cacho, Cephise1, Author
Chapman, Richard T.1, Author
Wyatt, Adam1, Author
Springate, Emma1, Author
Lizzit, Daniel1, Author
Bignardi, Luca1, Author
Lizzit, Silvano1, Author
Mahatha, Sanjoy K.1, Author
Bianchi, Marco1, Author
Lanata, Nicola1, Author
King, Phil D. C.1, Author
Miwa, Jill A.1, Author
Balatsky V, Alexander1, Author
Hofmann, Philip1, AuthorUlstrup, Soren1, Author more..
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              

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 Abstract: In solid state photoemission experiments it is possible to extract information about the symmetry and orbital character of the electronic wave functions via the photoemission selection rules that shape the measured intensity. This approach can be expanded in a pump-probe experiment where the intensity contains additional information about interband excitations induced by an ultrafast laser pulse with tunable polarization. Here, we find an unexpected strong linear dichroism effect (up to 42.4%) in the conduction band of bilayer MoS2, when measuring energy- and momentum-resolved snapshots of excited electrons by time- and angle-resolved photoemission spectroscopy. We model the polarization-dependent photoemission intensity in the transiently populated conduction band using the semiconductor Bloch equations. Our theoretical analysis reveals a strongly anisotropic momentum dependence of the optical excitations due to intralayer single-particle hopping, which explains the observed linear dichroism.

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Language(s): eng - English
 Dates: 2019-12-122019-12-12
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 100 (24) Sequence Number: 241406 Start / End Page: 1 - 6 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008