Momentum-resolved linear dichroism in bilayer MoS2

Klara Volckaert; Habib Rostami; Deepnarayan Biswas; Igor Markovic; Federico Andreatta; Charlotte Sanders; Paulina Majchrzak; Cephise Cacho; Richard T. Chapman; Adam Wyatt; Emma Springate; Daniel Lizzit; Luca Bignardi; Silvano Lizzit; Sanjoy Mahatha; Marco Bianchi; Nicola Lanata; Phil King; Jill A. Miwa; Alexander Balatsky; Philip Hofmann; Søren Ulstrup

doi:10.1103/PhysRevB.100.241406

Momentum-resolved linear dichroism in bilayer MoS₂

Klara Volckaert, Habib Rostami, Deepnarayan Biswas, Igor Markovic, Federico Andreatta, Charlotte Sanders, Paulina Majchrzak, Cephise Cacho, Richard T. Chapman, Adam Wyatt, Emma Springate, Daniel Lizzit, Luca Bignardi, Silvano Lizzit, Sanjoy Mahatha, Marco Bianchi, Nicola Lanata, Phil King, Jill A. Miwa, Alexander BalatskyPhilip Hofmann, Søren Ulstrup

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Article number	241406(R)
Journal	Physical Review. B, Condensed matter and materials physics
Volume	100
DOIs	https://doi.org/10.1103/PhysRevB.100.241406
Publication status	Published - 12 Dec 2019

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Copyright © 2019 American Physical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1103/PhysRevB.100.241406
Accepted author manuscript, 3.46 MB

RS Phil King: Electronic Structure Engineering of Novel Topological Phases
King, P. (PI)
1/10/18 → 30/09/21
Project: Fellowship
Engineered Quantum States: Engineered quantum states via atmoic-scale assembly of artificial 2D heterostructures
King, P. (PI)
The Leverhulme Trust
1/08/17 → 31/07/22
Project: Standard
Philip Leverhulme Prize Award: Philip Leverhulme Prize Nomination
King, P. (PI)
The Leverhulme Trust
1/08/16 → 31/07/19
Project: Standard

Momentum-resolved linear dichroism in bilayer MoS2 (dataset)
Volckaert, K. (Creator), Rostami, H. (Creator), Biswas, D. (Creator), Markovic, I. (Creator), Andreatta, F. (Creator), Sanders, C. (Creator), Majchrzak, P. (Creator), Cacho, C. (Creator), Chapman, R. (Creator), Wyatt, A. (Creator), Springate, E. (Creator), Lizzit, D. (Creator), Bignardi, L. (Creator), Lizzit, S. (Creator), Mahatha, S. (Creator), Bianchi, M. (Creator), Lanata, N. (Creator), King, P. (Creator), Miwa, J. (Creator), Balatsky, A. (Creator), Hofmann, P. (Creator) & Ulstrup, S. (Creator), University of St Andrews, 7 Jan 2020
DOI: 10.17630/401b4d4d-406f-47b6-bb0f-45b0df94903d
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Volckaert, K., Rostami, H., Biswas, D., Markovic, I., Andreatta, F., Sanders, C., Majchrzak, P., Cacho, C., Chapman, R. T., Wyatt, A., Springate, E., Lizzit, D., Bignardi, L., Lizzit, S., Mahatha, S., Bianchi, M., Lanata, N., King, P., Miwa, J. A., ... Ulstrup, S. (2019). Momentum-resolved linear dichroism in bilayer MoS₂. Physical Review. B, Condensed matter and materials physics, 100, Article 241406(R). https://doi.org/10.1103/PhysRevB.100.241406

@article{0c96064f84064c069448ebb76564f0c2,

title = "Momentum-resolved linear dichroism in bilayer MoS2",

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.",

author = "Klara Volckaert and Habib Rostami and Deepnarayan Biswas and Igor Markovic and Federico Andreatta and Charlotte Sanders and Paulina Majchrzak and Cephise Cacho and Chapman, {Richard T.} and Adam Wyatt and Emma Springate and Daniel Lizzit and Luca Bignardi and Silvano Lizzit and Sanjoy Mahatha and Marco Bianchi and Nicola Lanata and Phil King and Miwa, {Jill A.} and Alexander Balatsky and Philip Hofmann and S{\o}ren Ulstrup",

note = "Authors gratefully acknowledge funding from VILLUM FONDEN through the Young Investigator Program (Grant No. 15375) and the Centre of Excellence for Dirac Materials (Grant No. 11744), the Danish Council for Independent Research, Natural Sciences under the Sapere Aude program (Grants No. DFF-4002-00029 and No. DFF-6108-00409), and the Aarhus University Research Foundation. Access to the Artemis Facility was funded by STFC. H.R. acknowledges the support from the Swedish Research Council (VR 2018-04252). I.M. acknowledges financial support by the International Max Planck Research School for Chemistry and Physics of Quantum Materials (IMPRS-CPQM). The authors also acknowledge The Royal Society and The Leverhulme Trust.",

year = "2019",

month = dec,

day = "12",

doi = "10.1103/PhysRevB.100.241406",

language = "English",

volume = "100",

journal = "Physical Review. B, Condensed matter and materials physics",

issn = "1098-0121",

publisher = "American Physical Society",

}

Volckaert, K, Rostami, H, Biswas, D, Markovic, I, Andreatta, F, Sanders, C, Majchrzak, P, Cacho, C, Chapman, RT, Wyatt, A, Springate, E, Lizzit, D, Bignardi, L, Lizzit, S, Mahatha, S, Bianchi, M, Lanata, N, King, P, Miwa, JA, Balatsky, A, Hofmann, P & Ulstrup, S 2019, 'Momentum-resolved linear dichroism in bilayer MoS₂', Physical Review. B, Condensed matter and materials physics, vol. 100, 241406(R). https://doi.org/10.1103/PhysRevB.100.241406

TY - JOUR

T1 - Momentum-resolved linear dichroism in bilayer MoS2

AU - Volckaert, Klara

AU - Rostami, Habib

AU - Biswas, Deepnarayan

AU - Markovic, Igor

AU - Andreatta, Federico

AU - Sanders, Charlotte

AU - Majchrzak, Paulina

AU - Cacho, Cephise

AU - Chapman, Richard T.

AU - Wyatt, Adam

AU - Springate, Emma

AU - Lizzit, Daniel

AU - Bignardi, Luca

AU - Lizzit, Silvano

AU - Mahatha, Sanjoy

AU - Bianchi, Marco

AU - Lanata, Nicola

AU - King, Phil

AU - Miwa, Jill A.

AU - Balatsky, Alexander

AU - Hofmann, Philip

AU - Ulstrup, Søren

N1 - Authors gratefully acknowledge funding from VILLUM FONDEN through the Young Investigator Program (Grant No. 15375) and the Centre of Excellence for Dirac Materials (Grant No. 11744), the Danish Council for Independent Research, Natural Sciences under the Sapere Aude program (Grants No. DFF-4002-00029 and No. DFF-6108-00409), and the Aarhus University Research Foundation. Access to the Artemis Facility was funded by STFC. H.R. acknowledges the support from the Swedish Research Council (VR 2018-04252). I.M. acknowledges financial support by the International Max Planck Research School for Chemistry and Physics of Quantum Materials (IMPRS-CPQM). The authors also acknowledge The Royal Society and The Leverhulme Trust.

PY - 2019/12/12

Y1 - 2019/12/12

N2 - 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.

AB - 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.

U2 - 10.1103/PhysRevB.100.241406

DO - 10.1103/PhysRevB.100.241406

M3 - Article

SN - 1098-0121

VL - 100

JO - Physical Review. B, Condensed matter and materials physics

JF - Physical Review. B, Condensed matter and materials physics

M1 - 241406(R)

ER -

Momentum-resolved linear dichroism in bilayer MoS2

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Projects

RS Phil King: Electronic Structure Engineering of Novel Topological Phases

Engineered Quantum States: Engineered quantum states via atmoic-scale assembly of artificial 2D heterostructures

Philip Leverhulme Prize Award: Philip Leverhulme Prize Nomination

Datasets

Momentum-resolved linear dichroism in bilayer MoS2 (dataset)

Cite this

Momentum-resolved linear dichroism in bilayer MoS₂