Charge Transfer and Asymmetric Coupling of MoSe<sub>2</sub> Valleys to the Magnetic Order of CrSBr

Serati de Brito, Caique; Faria Junior, Paulo E.; Ghiasi, Talieh S.; Ingla-Aynés, Josep; Rabahi, César Ricardo; Cavalini, Camila; Dirnberger, Florian; Mañas-Valero, Samuel; Watanabe, Kenji; Taniguchi, Takashi; Zollner, Klaus; Fabian, Jaroslav; Schüller, Christian; van der Zant, Herre S. J.; Gobato, Yara Galvão

doi:10.1021/acs.nanolett.3c03431

Cited by 10 publications

(2 citation statements)

References 80 publications

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“…More conventional proximity effects are observed in heterostructures of graphene, where the ferromagnetic order of the interfacial CrSBr layer induces spin-polarization for conduction through the graphene layer . CrSBr also acts as an interfacial electron acceptor in heterostructures with MoSe 2 , wherein the degree of charge transfer is sensitive to the magnetic state of CrSBr . While less explored than heterostructures with the chromium trihalide family, these early results highlight the ability to leverage the air stability and in-plane magnetization of CrSBr in new vdW assemblies.…”

Section: Coupling Between Electronic and Magnetic Structurementioning

confidence: 98%

“…The in-plane magnetization of CrSBr generates a perpendicular stray field only at its edge, allowing for precise positioning of a local vertical field in vdW heterostructures . Recent computational and experimental results provide evidence for interfacial charge transfer between CrSBr and graphene or semiconducting TMDs. , Coupling between the band structure of these materials and the quasi-1D conduction band of CrSBr could provide a general route to achieve 1D physics via proximity effects.…”

Section: Outlook and Future Directionsmentioning

confidence: 99%

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CrSBr: An Air-Stable, Two-Dimensional Magnetic Semiconductor

Ziebel,

Feuer,

Cox

et al. 2024

Nano Lett.

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The discovery of magnetic order at the 2D limit has sparked new exploration of van der Waals magnets for potential use in spintronics, magnonics, and quantum information applications. However, many of these materials feature low magnetic ordering temperatures and poor air stability, limiting their fabrication into practical devices. In this Mini-Review, we present a promising material for fundamental studies and functional use: CrSBr, an air-stable, two-dimensional magnetic semiconductor. Our discussion highlights experimental research on bulk CrSBr, including quasi-1D semiconducting properties, A-type antiferromagnetic order (T N = 132 K), and strong coupling between its electronic and magnetic properties. We then discuss the behavior of monolayer and few-layer flakes and present a perspective on promising avenues for further studies on CrSBr.

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Section: Coupling Between Electronic and Magnetic Structurementioning

confidence: 98%

Section: Outlook and Future Directionsmentioning

confidence: 99%

CrSBr: An Air-Stable, Two-Dimensional Magnetic Semiconductor

Ziebel,

Feuer,

Cox

et al. 2024

Nano Lett.

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Intrinsic Localized Excitons in MoSe₂/CrSBr Heterostructure

Huang,

Song,

Gao

et al. 2024

Advanced Materials

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Despite extensive studies on magnetic proximity effects, the fundamental excitonic properties of the 2D semiconductor‐magnet heterostructures remain elusive. Here, the presence of localized excitons in MoSe2/CrSBr heterostructures is unveiled, represented by a new photoluminescence emission feature, X*. Our findings reveal that X* originates from excitons confined by intrinsic defects in the CrSBr layer. Additionally, the degrees of valley polarization of the X* and trion peaks exhibit opposite polarities under a magnetic field and closely correlate with the magnetic order of CrSBr. This is attributed to spin‐dependent charge transfer across the heterointerface, supported by density functional theory calculations which reveal a type‐II band alignment. Furthermore, the strong in‐plane anisotropy of CrSBr induces unique polarization‐dependent responses in MoSe2 emissions. This study highlights the crucial role of defects in shaping excitonic properties and offers valuable insights into spectrally resolved proximity effects in semiconductor‐magnet van der Waals heterostructures.

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Giant Optical Anisotropy Induced by Magnetic Order in FePS₃/WSe₂ Heterostructures

Chen,

Xie,

Oyang

et al. 2024

Small

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Magnetic 2D materials offer a promising platform for manipulating quantum states at the nanoscale. Recent studies have underscored the significant influence of 2D magnetic materials on the optical behaviors of transition‐metal dichalcogenides (TMDs), revealing phenomena such as interlayer exciton‐magnon interactions, magnetization‐dependent valley polarization, and an enhanced Zeeman effect. However, the controlled manipulation of anisotropic optical properties in TMDs via magnetism remains challenging. Here, the magnetic ordering in FePS3 profoundly impacts the optical characteristics of WSe2, achieving a giant linear polarization degree of 5.1 in exciton emission is demonstrated. This is supported by a detailed analysis of low‐temperature photoluminescence (PL) and Raman spectra from nL‐FePS3/WSe2 heterostructures. These findings indicate that a phase transition in FePS3 from paramagnetic to antiferromagnetic enhances interlayer Coulomb interactions, inducing a transition from non‐polar to polar behavior in the heterostructures. Additionally, valley‐polarized PL spectra under magnetic fields from −9 to 9 T reveal the influence of FePS3 on valley polarization and Zeeman splitting of excitons in monolayer WSe2. These results present a novel strategy for tailoring the optoelectronic properties of 2D magnetic van der Waals heterostructures, paving the way for advancements in nanoscale device design.

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

Cited by 10 publications

References 80 publications

CrSBr: An Air-Stable, Two-Dimensional Magnetic Semiconductor

CrSBr: An Air-Stable, Two-Dimensional Magnetic Semiconductor

Intrinsic Localized Excitons in MoSe₂/CrSBr Heterostructure

Giant Optical Anisotropy Induced by Magnetic Order in FePS₃/WSe₂ Heterostructures

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

Cited by 10 publications

References 80 publications

CrSBr: An Air-Stable, Two-Dimensional Magnetic Semiconductor

CrSBr: An Air-Stable, Two-Dimensional Magnetic Semiconductor

Intrinsic Localized Excitons in MoSe2/CrSBr Heterostructure

Giant Optical Anisotropy Induced by Magnetic Order in FePS3/WSe2 Heterostructures

Contact Info

Product

Resources

About

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

Intrinsic Localized Excitons in MoSe₂/CrSBr Heterostructure

Giant Optical Anisotropy Induced by Magnetic Order in FePS₃/WSe₂ Heterostructures