Anomalous Exciton Hall Effect

Kozin, V. K.; Shabashov, V. A.; Kavokin, Alexey; Shelykh, I. A.

doi:10.1103/physrevlett.126.036801

Cited by 16 publications

(17 citation statements)

References 28 publications

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“…On the contrary, the angular dependence is characterized by a sharp maxima at θ ≈ π/12, position of which weakly depends on the exciton wave vector. As some of us demonstrated earlier, asymmetric scattering can lead to the excitonic anomalous Hall effect 37 .…”

Section: Exciton Scatteringmentioning

confidence: 85%

“…Similar to the scattering of massive spinor paricle 44 , the exciton scattering in spinless domain is characterized by giant asymmetry, provided by emerging synthetic U(1) gauge field. Such asymmetric scattering is a necessary prerequisite of the excitonic anomalous Hall effect 37 . The second scenario accounts for the impact of diamagnetic effect on the exciton-skyrmion interaction.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

“…1 (a). The scattering on a skyrmion is characterized by strong asymmetry, implying the possibility of Hall-like exciton transport 37 . The possibility to localize excitons leads to the formation of analogs of quantum dots with tunable properties, which can be used as polarization selective single photon emitters.…”

Section: Introductionmentioning

confidence: 99%

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Interaction of excitons with magnetic topological defects in 2D magnetic monolayers: localization and anomalous Hall effect

Kazemi¹,

Shahnazaryan²,

Zhumagulov³

et al. 2022

Preprint

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Novel 2D material CrI 3 reveals unique combination of 2D ferromagnetism and robust excitonic response. We demonstrate that the possibility of the formation of magnetic topological defects, such as Néel skyrmions, together with large excitonic Zeeman splitting, leads to giant scattering asymmetry, which is the necessary prerequisite for the excitonic anomalous Hall effect. In addition, the diamagnetic effect breaks the inversion symmetry, and in certain cases can result in exciton localization on the skyrmion. This enables the formation of magnetoexcitonic quantum dots with tunable parameters.

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Section: Exciton Scatteringmentioning

confidence: 85%

Section: Conclusion and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Interaction of excitons with magnetic topological defects in 2D magnetic monolayers: localization and anomalous Hall effect

Kazemi¹,

Shahnazaryan²,

Zhumagulov³

et al. 2022

Preprint

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“…This picture is validated via ab-initio calculations of the exciton Zeeman splitting in good agreement with recent experimental studies. More generally, the orbital angular momentum constitutes an internal degree of freedom of valley excitons that influences selections rules, the coupling to external perturbations and other spin-orbital degrees of freedom, and it provides a promising concept to unravel the recently discovered topological behaviour of excitons 8,35 .…”

Section: Discussionmentioning

confidence: 99%

“…The presence of an external magnetic field leads to the valley Zeeman effect, whereby the degeneracy of valley excitons is lifted and the ensuing energy shift is linear in the field intensity 6,34 . In presence of an in-plane electric field, valley excitons are subject to the exciton Hall effect, a drift velocity transversal to field orientation which is reminiscent of the anomalous Hall effect 8,35 . Overall, these findings suggest that valley excitons may possess an additional orbital degree of freedom governing its interaction with external perturbation and their topological properties.…”

Section: Introductionmentioning

confidence: 99%

Chirality of Valley Excitons in Monolayer Transition-Metal Dichalcogenides

Caruso¹,

Schebek²,

Pan³

et al. 2021

Preprint

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By enabling control of valley degrees of freedom in transition-metal dichalcogenides, valley-selective circular dichroism has become a key concept in valleytronics. In this manuscript, we show that valley excitons -bound electron-hole pairs formed at either the K or K valleys upon absorption of circularly-polarized light -are chiral quasiparticles characterized by a finite orbital angular momentum (OAM). We further formulate an ab-initio many-body theory of valley-selective circular dichroism and valley excitons based on the Bethe-Salpeter equation. Beside governing the interaction with circularly polarized light, the OAM confers excitons a finite magnetization which manifests itself through an excitonic Zeeman splitting upon interaction with external magnetic fields. The good agreement between our ab-initio calculations and recent experimental measurements of the exciton Zeeman shifts corroborate this picture.

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