Charge Transfer and Asymmetric Coupling of MoSe2 Valleys to the Magnetic Order of CrSBr

Caique Serati de Brito; Paulo E. Faria Junior; Talieh S. Ghiasi; Josep Ingla-Aynés; César Ricardo Rabahi; Camila Cavalini; Samuel Mañas-Valero; Takashi Taniguchi; Herre S.J. van der Zant; null More Authors

doi:10.1021/acs.nanolett.3c03431

Charge Transfer and Asymmetric Coupling of MoSe₂ Valleys to the Magnetic Order of CrSBr

Caique Serati de Brito, Paulo E. Faria Junior, Talieh S. Ghiasi, Josep Ingla-Aynés, César Ricardo Rabahi, Camila Cavalini, Samuel Mañas-Valero, Takashi Taniguchi, Herre S.J. van der Zant, More Authors

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

Abstract

van der Waals heterostructures composed of two-dimensional (2D) transition metal dichalcogenides and vdW magnetic materials offer an intriguing platform to functionalize valley and excitonic properties in nonmagnetic TMDs. Here, we report magneto photoluminescence (PL) investigations of monolayer (ML) MoSe₂ on the layered A-type antiferromagnetic (AFM) semiconductor CrSBr under different magnetic field orientations. Our results reveal a clear influence of the CrSBr magnetic order on the optical properties of MoSe₂, such as an anomalous linear-polarization dependence, changes of the exciton/trion energies, a magnetic-field dependence of the PL intensities, and a valley g-factor with signatures of an asymmetric magnetic proximity interaction. Furthermore, first-principles calculations suggest that MoSe₂/CrSBr forms a broken-gap (type-III) band alignment, facilitating charge transfer processes. The work establishes that antiferromagnetic-nonmagnetic interfaces can be used to control the valley and excitonic properties of TMDs, relevant for the development of opto-spintronics devices.

Original language	English
Pages (from-to)	11073-11081
Journal	Nano Letters
Volume	23
Issue number	23
DOIs	https://doi.org/10.1021/acs.nanolett.3c03431
Publication status	Published - 2023

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

magneto-optics
proximity effects
transition metal dichalcogenides
two-dimensional magnets
van der Waals heterostructures

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10.1021/acs.nanolett.3c03431

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title = "Charge Transfer and Asymmetric Coupling of MoSe2 Valleys to the Magnetic Order of CrSBr",

abstract = "van der Waals heterostructures composed of two-dimensional (2D) transition metal dichalcogenides and vdW magnetic materials offer an intriguing platform to functionalize valley and excitonic properties in nonmagnetic TMDs. Here, we report magneto photoluminescence (PL) investigations of monolayer (ML) MoSe2 on the layered A-type antiferromagnetic (AFM) semiconductor CrSBr under different magnetic field orientations. Our results reveal a clear influence of the CrSBr magnetic order on the optical properties of MoSe2, such as an anomalous linear-polarization dependence, changes of the exciton/trion energies, a magnetic-field dependence of the PL intensities, and a valley g-factor with signatures of an asymmetric magnetic proximity interaction. Furthermore, first-principles calculations suggest that MoSe2/CrSBr forms a broken-gap (type-III) band alignment, facilitating charge transfer processes. The work establishes that antiferromagnetic-nonmagnetic interfaces can be used to control the valley and excitonic properties of TMDs, relevant for the development of opto-spintronics devices.",

keywords = "magneto-optics, proximity effects, transition metal dichalcogenides, two-dimensional magnets, van der Waals heterostructures",

author = "{Serati de Brito}, Caique and {Faria Junior}, {Paulo E.} and Ghiasi, {Talieh S.} and Josep Ingla-Ayn{\'e}s and Rabahi, {C{\'e}sar Ricardo} and Camila Cavalini and Samuel Ma{\~n}as-Valero and Takashi Taniguchi and {van der Zant}, {Herre S.J.} and {More Authors}",

note = "Green Open Access added to TU Delft Institutional Repository {\textquoteleft}You share, we take care!{\textquoteright} – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.",

year = "2023",

doi = "10.1021/acs.nanolett.3c03431",

language = "English",

volume = "23",

pages = "11073--11081",

journal = "Nano Letters",

issn = "1530-6984",

publisher = "American Chemical Society (ACS)",

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TY - JOUR

T1 - Charge Transfer and Asymmetric Coupling of MoSe2 Valleys to the Magnetic Order of CrSBr

AU - Serati de Brito, Caique

AU - Faria Junior, Paulo E.

AU - Ghiasi, Talieh S.

AU - Ingla-Aynés, Josep

AU - Rabahi, César Ricardo

AU - Cavalini, Camila

AU - Mañas-Valero, Samuel

AU - Taniguchi, Takashi

AU - van der Zant, Herre S.J.

AU - More Authors, null

N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

PY - 2023

Y1 - 2023

N2 - van der Waals heterostructures composed of two-dimensional (2D) transition metal dichalcogenides and vdW magnetic materials offer an intriguing platform to functionalize valley and excitonic properties in nonmagnetic TMDs. Here, we report magneto photoluminescence (PL) investigations of monolayer (ML) MoSe2 on the layered A-type antiferromagnetic (AFM) semiconductor CrSBr under different magnetic field orientations. Our results reveal a clear influence of the CrSBr magnetic order on the optical properties of MoSe2, such as an anomalous linear-polarization dependence, changes of the exciton/trion energies, a magnetic-field dependence of the PL intensities, and a valley g-factor with signatures of an asymmetric magnetic proximity interaction. Furthermore, first-principles calculations suggest that MoSe2/CrSBr forms a broken-gap (type-III) band alignment, facilitating charge transfer processes. The work establishes that antiferromagnetic-nonmagnetic interfaces can be used to control the valley and excitonic properties of TMDs, relevant for the development of opto-spintronics devices.

AB - van der Waals heterostructures composed of two-dimensional (2D) transition metal dichalcogenides and vdW magnetic materials offer an intriguing platform to functionalize valley and excitonic properties in nonmagnetic TMDs. Here, we report magneto photoluminescence (PL) investigations of monolayer (ML) MoSe2 on the layered A-type antiferromagnetic (AFM) semiconductor CrSBr under different magnetic field orientations. Our results reveal a clear influence of the CrSBr magnetic order on the optical properties of MoSe2, such as an anomalous linear-polarization dependence, changes of the exciton/trion energies, a magnetic-field dependence of the PL intensities, and a valley g-factor with signatures of an asymmetric magnetic proximity interaction. Furthermore, first-principles calculations suggest that MoSe2/CrSBr forms a broken-gap (type-III) band alignment, facilitating charge transfer processes. The work establishes that antiferromagnetic-nonmagnetic interfaces can be used to control the valley and excitonic properties of TMDs, relevant for the development of opto-spintronics devices.

KW - magneto-optics

KW - proximity effects

KW - transition metal dichalcogenides

KW - two-dimensional magnets

KW - van der Waals heterostructures

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DO - 10.1021/acs.nanolett.3c03431

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SN - 1530-6984

VL - 23

SP - 11073

EP - 11081

JO - Nano Letters

JF - Nano Letters

IS - 23

ER -

Charge Transfer and Asymmetric Coupling of MoSe₂ Valleys to the Magnetic Order of CrSBr

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