Spin photovoltaic effect in magnetic van der Waals heterostructures

Song, Tiancheng; Anderson, Eric; Tu, Matisse Wei-Yuan; Seyler, Kyle L.; Taniguchi, Takashi; Watanabe, Kenji; McGuire, Michael A.; Li, Xiaosong; Cao, Ting; Wang, Yao; Xu, Xiaodong

doi:10.1126/sciadv.abg8094

Cited by 29 publications

(30 citation statements)

References 47 publications

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“…2,3 2D vdW magnets provide an ideal platform for understanding 2D magnetism, stimulating a great deal of research work in the fields of atomically thin magneto-optic and magnetoelectric devices. [4][5][6][7] Exploring novel magnetic phenomena and modulating magnetic interaction in two-dimension has gradually become a research hotspot.…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional magnetic Janus monolayers and their van der Waals heterostructures: a review on recent progress

Jiang

2023

Mater. Horiz.

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Section: Introductionmentioning

confidence: 99%

Two-dimensional magnetic Janus monolayers and their van der Waals heterostructures: a review on recent progress

Jiang

2023

Mater. Horiz.

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“…Excitonic spin-valley polarization in TMDC monolayers can persist for several tens of picoseconds 21 , 22 up to tens of nanoseconds 23 , while efficient spin-dependent charge transfer between stacked 2D flakes can be realized experimentally 24 . Recently, particular attention has been devoted to heterostructures assembled from TMDCs and 2D magnets, where spin-dependent charge transfer has revealed unprecedented novel functionalities 25 – 29 .…”

Section: Introductionmentioning

confidence: 99%

All-optical control of spin in a 2D van der Waals magnet

et al. 2022

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Two-dimensional (2D) van der Waals magnets provide new opportunities for control of magnetism at the nanometre scale via mechanisms such as strain, voltage and the photovoltaic effect. Ultrafast laser pulses promise the fastest and most energy efficient means of manipulating electron spin and can be utilized for information storage. However, little is known about how laser pulses influence the spins in 2D magnets. Here we demonstrate laser-induced magnetic domain formation and all-optical switching in the recently discovered 2D van der Waals ferromagnet CrI3. While the magnetism of bare CrI3 layers can be manipulated with single laser pulses through thermal demagnetization processes, all-optical switching is achieved in nanostructures that combine ultrathin CrI3 with a monolayer of WSe2. The out-of-plane magnetization is switched with multiple femtosecond pulses of either circular or linear polarization, while single pulses result in less reproducible and partial switching. Our results imply that spin-dependent interfacial charge transfer between the WSe2 and CrI3 is the underpinning mechanism for the switching, paving the way towards ultrafast optical control of 2D van der Waals magnets for future photomagnetic recording and device technology.

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“…CrI 3 is a semiconductor with an electronic band gap of 1.2 eV, which is in the lower range of the 1-3-eV band gaps of the chromium trihalides [15,16]. This family of materials are useful for magneto-optics and magnetic tunnel junctions, where they are already known to perform extremely well [17][18][19]. Thus it is of great importance to understand the microscopic origins behind both the optical and magnetic properties of these materials.…”

Section: Introductionmentioning

confidence: 99%

Dynamical correlations in single-layer CrI3

Kvashnin

Руденко²,

Thunström

et al. 2022

Phys. Rev. B

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Chromium triiodide is an intrinsically magnetic van der Waals material down to the single-layer limit. Here, we provide a first-principles description of finite-temperature magnetic and spectral properties of monolayer (ML) CrI 3 based on fully charge self-consistent density functional theory (DFT) combined with dynamical mean-field theory, revealing a formation of local moments on Cr from strong local Coulomb interactions. We show that the presence of local dynamical correlations leads to a modification of the electronic structure of ferromagnetically ordered CrI 3 . In contrast to conventional DFT+U calculations, we find that the top of the valence band in ML CrI 3 demonstrates essentially different orbital character for minority and majority spin states, which is closer to the standard DFT results. This leads to a strong spin polarization of the optical conductivity upon hole doping, which could be verified experimentally.

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Spin photovoltaic effect in magnetic van der Waals heterostructures

Abstract: Spin-photovoltaic effect in 2D magnet CrI 3 exhibits interplay between magneto-excitons, photon energy, and light helicity.

Cited by 29 publications

References 47 publications

Two-dimensional magnetic Janus monolayers and their van der Waals heterostructures: a review on recent progress

Two-dimensional magnetic Janus monolayers and their van der Waals heterostructures: a review on recent progress

All-optical control of spin in a 2D van der Waals magnet

Dynamical correlations in single-layer CrI3

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