Photocurrents of charge and spin in monolayer 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Fe</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi>GeTe</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>

Merte, M.; Freimuth, Frank; Adamantopoulos, T.; Go, Dongwook; Saunderson, Tom G.; Kläui, Mathias; Pluciński, Ł.; Gomonay, Olena; Blügel, Stefan; Mokrousov, Yuriy

doi:10.1103/physrevb.104.l220405

Cited by 6 publications

(4 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Namely, we calculate the spin accumulation, charge and spin photocurrents which arise at second order in the perturbing electric field of a continuous laser pulse of frequency ω by using the expressions which were previously derived by us in Ref. 30 within the framework of the Keldysh formalism, and applied to various systems [31][32][33] . Throughout this work the assumed intensity of the pulse was set to 10 GW/cm 2 , which corresponds to typical values of the fluence of the order of 0.5 mJ/cm 2 for a 50 fs laser pulse 34 .…”

Section: Electronic Structure and Computational Detailsmentioning

confidence: 99%

Photocurrents, inverse Faraday effect and photospin Hall effect in Mn$_2$Au

Merte¹,

Freimuth²,

Go³

et al. 2023

Preprint

View full text Add to dashboard Cite

Among antiferromagnetic materials, Mn 2 Au is one of the most intensively studied, and it serves as a very popular platform for testing various ideas related to antiferromagnetic magnetotransport and dynamics. Since recently, this material has also attracted considerable interest in the context of optical properties and optically-driven antiferromagnetic switching. In this work, we use first principles methods to explore the physics of charge photocurrents, spin photocurrents and inverse Faraday effect in antiferromagnetic Mn 2 Au. We predict the symmetry and magnitude of these effects, and speculate that they can be used for tracking the dynamics of staggered moments during switching. Our calculations reveal the emergence of large photocurrents of spin in collinear Mn 2 Au, whose properties can be understood as a result of a non-linear optical version of spin Hall effect − which we refer to as the photospin Hall effect − encoded into the relation between the driving charge and resulting spin photocurrents. Moreover, we suggest that even a very small canting in Mn 2 Au can give rise to colossal spin photocurrents which are chiral in flavor. We conclude that the combination of staggered magnetization with the structural and electronic properties of this material results in a unique blend of prominent photocurrents, which makes Mn 2 Au a unique platform for advanced optospintronics applications.

show abstract

Section: Electronic Structure and Computational Detailsmentioning

confidence: 99%

Photocurrents, inverse Faraday effect and photospin Hall effect in Mn$_2$Au

Merte¹,

Freimuth²,

Go³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Generally, the physics of optical generation and properties of laser-induced currents appearing at surfaces and interfaces is attracting considerable attention these days, owing in part to the phenomenon of THz radiation generation with so-called spintronics THz emitters [14,15]. In the context of spinorbitronics inspired optical effects, properties of spin photocurrents start coming under scrutiny as well [16][17][18][19][20][21][22][23][24]. However, besides the studies of inverse Faraday effect in the orbital channel [25][26][27] and studies on optically-ignited orbital dynamics [28][29][30], the phenomenon of orbital photocurrents is largely unexplored, both from the side of fundamental properties as well as their microscopic origins.…”

mentioning

confidence: 99%

“…To explore the possibility of generating large orbital photocurrents in realistic systems, we choose a prominent representative of the class of strong Rashba surfaces: the BiAg 2 alloy [37,38]. We compute the electronic structure of the BiAg 2 surface from ab-initio by using the the full-potential linearized augmented plane wave FLEUR code [39], and employ the Wannier interpolation technique to assess from first principles the laser-induced orbital and spin photocurrents by using Keldysh formalism [23,40,41]. Further computational details and details of the method are given in the Supplemental Material.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Orbital Rashba effect as a platform for robust orbital photocurrents

Adamantopoulos¹,

Merte²,

Go³

et al. 2023

Preprint

View full text Add to dashboard Cite

Orbital current has emerged over the past years as one of the key novel concepts in magnetotransport. Here, we demonstrate that laser pulses can be used to generate large and robust non-relativistic orbital currents in systems where the inversion symmetry is broken by the orbital Rashba effect. By referring to model and first principles tools, we demonstrate that orbital Rashba effect, accompanied by crystal field splitting, can mediate robust orbital photocurrents without a need for spin-orbit interaction even in metallic systems. We show that such non-relativistic orbital photocurrents are translated into derivative photocurrents of spin when relativistic effects are taken into account. We thus promote orbital photocurrents as a promising platform for optical generation of currents of angular momentum, and discuss their possible applications.

show abstract

Photocurrents, inverse Faraday effect, and photospin Hall effect in Mn2Au

Merte

Freimuth

et al. 2023

APL Materials

View full text Add to dashboard Cite

Among antiferromagnetic materials, Mn2Au is one of the most intensively studied, and it serves as a very popular platform for testing various ideas related to antiferromagnetic magnetotransport and dynamics. Since recently, this material has also attracted considerable interest in the context of optical properties and optically-driven antiferromagnetic switching. In this work, we use first principles methods to explore the physics of charge photocurrents, spin photocurrents, and the inverse Faraday effect in antiferromagnetic Mn2Au. We predict the symmetry and magnitude of these effects and speculate that they can be used for tracking the dynamics of staggered moments during switching. Our calculations reveal the emergence of large photocurrents of spin in collinear Mn2Au, whose properties can be understood as a result of a non-linear optical version of the spin Hall effect, which we refer to as the photospin Hall effect, encoded into the relation between the driving charge and resulting spin photocurrents. Moreover, we suggest that even a very small canting in Mn2Au can give rise to colossal spin photocurrents that are chiral in flavor. We conclude that the combination of staggered magnetization with the structural and electronic properties of this material results in a unique blend of prominent photocurrents, which makes Mn2Au a unique platform for advanced optospintronics applications.

show abstract

Photocurrents of charge and spin in monolayer Fe3GeTe2

Cited by 6 publications

References 41 publications

Photocurrents, inverse Faraday effect and photospin Hall effect in Mn$_2$Au

Photocurrents, inverse Faraday effect and photospin Hall effect in Mn$_2$Au

Orbital Rashba effect as a platform for robust orbital photocurrents

Photocurrents, inverse Faraday effect, and photospin Hall effect in Mn2Au

Contact Info

Product

Resources

About