Inverse Faraday effect in graphene and Weyl semimetals

Tokman, I. D.; Chen, Qianfan; Shereshevsky, I. A.; Pozdnyakova, V. I.; Оладышкин, И. В.; Tokman, M. D.; Belyanin, Alexey

doi:10.1103/physrevb.101.174429

Cited by 33 publications

(25 citation statements)

References 53 publications

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“…In linear regime, the electric field induced orbital magnetization have been experimentally observed in strained MoS 2 [44]. In addition, several works predict that the static magnetization can be generated through the socalled inverse Faraday effect in the nonlinear regime [45][46][47][48]. Here we propose another fascinating light induced orbital magnetization, namely the quantized circular photoinduced orbital magnetization (CPOM) for multifold fermions.…”

Section: Introductionmentioning

confidence: 85%

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Low-Frequency Divergence of Circular Photomagnetic Effect in Topological Semimetals

Cao¹,

Zeng²,

Li³

et al. 2022

Preprint

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Multifold fermions are among the most promising candidates for directly probing the materials topology, such as the topological charges and Chern numbers. Recently, the quantized circular photogalvanic effect (CPGE) was predicted for the chiral Weyl semimetals (WSMs). Such a remarkable quantization has been generalized to the unconventional multifold fermions, and soon afterwards identified firstly for the multifold fermions in experiments. However, most of the rich topological properties of the multifold fermions remain largely unveiled so far. Here we propose the remarkable quantized circular photoinduced orbital magnetization (CPOM) for the multifold fermions. In particular, we demonstrate that the manifested quantizations are uniquely connected with the topological invariants for the spin-1 and spin-3/2 Weyl fermions. Furthermore, we show the quantization signature also holds for the general multifold fermions, which can be understood as a generic feature resulting from the intrinsic scale invariance. These interesting results are all numerically verified in this work, which can be experimentally checked in realistic multifold Weyl semimetals.

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Section: Introductionmentioning

confidence: 85%

“…A permanent magnetization can result from the interactions between the medium and circularly polarized light [45][46][47][48]. Consider a monochromatic incident light defined by…”

Section: Formalism Of Cpommentioning

confidence: 99%

Low-Frequency Divergence of Circular Photomagnetic Effect in Topological Semimetals

Cao¹,

Zeng²,

Li³

et al. 2022

Preprint

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“…6,18 An interaction of topological SMs with a continuouswave laser provides the studies of topological materials with another avenue from the perspective of the quantum control of underlying topological properties by means of built-in laser parameters -intensity, frequency ω, and polarization -and the exploration of topological phases that are in non-equilibrium. [43][44][45][46][47][48][49][50][51][52][53][54] Here, the to-tal Hamiltonian H(t) of concern at time t has temporal periodicity H(t) = H(t + T ) to ensure the Floquet theorem, with T = 2π/ω. 55 By the drive with a circularly polarized laser -in place of the application of a static intrinsic Zeeman field -, the T-symmetry in the DSMs and NLSMs is broken to form the WSMs, and these are termed as Floquet WSMs (FWSMs).…”

Section: Introductionmentioning

confidence: 99%

“…44 Very recently, frequency-independent magnetization mechanisms in response to circularly polarized light are studied in WSMs. 48,50 As regards the I-symmetry, this is also broken by the introduction of an interaction of electron with the continuous-wave laser. However, the time-glide Isymmetry holds correct instead to realize the same invariance in H(t) as the I-symmetry.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, it is likely that orbital magnetization results from the inverse Faraday effect that is a non-linear optical process caused by a circularly polarized laser field. [48][49][50]52,[70][71][72][73][74] Consequently, it is expected that the laser drive with a circular polarization in the almost resonant condition provides intriguing physics of FWSMs sharply distinct from the conventional one due to the intraband coupling in the reported studies. 43,45,64 The remainder of this paper is organized as follows.…”

Section: Introductionmentioning

confidence: 99%

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Floquet-Weyl semimetals generated by an optically resonant interband-transition

Zhang,

Hino,

Maeshima

2022

Preprint

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Floquet-Weyl semimetals (FWSMs) generated by irradiation of a continuous-wave laser with lefthand circular polarization (rotating in counterclockwise sense with time) on II3-V2-type narrow gap semiconductor Zn3As2 are theoretically investigated, where the frequency of the laser is set nearly resonant with a band gap of the crystal. It is found that the excitation of the crystal by such a laser induce two types of FWSM phases that differ absolutely in characters. To be specific, the associated two pairs of Weyl points are stably formed by band touching between Floquet sidebands ascribable to a valence band labeled as Jz = ±3/2 and a conduction band labeled as Jz = ±1/2, where Jz represents the z-components of total angular momentum quantum number of Γ-point and a double sign corresponds. Here, one FWSM state composed of the up-spin Floquet sidebands relevant to Jz = 3/2 and 1/2 shows almost quadratic band-touching in the vicinity of the associated pair of Weyl points, while the other FWSM state composed of the down-spin Floquet sidebands relevant to Jz = −3/2 and −1/2 shows linear band-touching. Further, it is revealed that both up-spin and down-spin sidebands host nontrivial two-dimensional surface states that are pinned to the respective pairs of the Weyl points. Both surface states also show different energy dispersions and physical properties. More detailed discussion is made in the text on the origin of the above findings, chirality of the FWSM phases, laser-induced magnetic properties, and so on.

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Organic Chiral Spin‐Optics: The Interaction between Spin and Photon in Organic Chiral Materials

Gao

Qin

2021

Advanced Optical Materials

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Recently, the spin-dependent effects in chiral materials are being intensively explored due to requirements of fundamental research and technological applications. In organic chiral materials, there is a strong electron−phonon coupling, which will affect the magnitude of spin polarization. Moreover, the chirality-generated orbital angular momentum can also affect spin polarization. Thus, the coupling among the electron spin, orbit, lattice, and photon can be effectively enhanced in organic chiral materials, which allows the existence of magneto-chiral dichroism, chirality-induced spin selection effects, magnetic field dependence of circularly polarized light emission and transmission. Recent studies on the electron spin and photon interaction in organic chiral materials are presented and understood here, which provides guidance for the future development and application in organic chiral spin-optics.

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Inverse Faraday effect in graphene and Weyl semimetals

Cited by 33 publications

References 53 publications

Low-Frequency Divergence of Circular Photomagnetic Effect in Topological Semimetals

Low-Frequency Divergence of Circular Photomagnetic Effect in Topological Semimetals

Floquet-Weyl semimetals generated by an optically resonant interband-transition

Organic Chiral Spin‐Optics: The Interaction between Spin and Photon in Organic Chiral Materials

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