Transverse chiral magnetic photocurrent induced by linearly polarized light in mirror-symmetric Weyl semimetals

Kaushik, Sahal; Kharzeev, Dmitri E.; Philip, Evan John

doi:10.1103/physrevresearch.2.042011

Cited by 13 publications

(4 citation statements)

References 27 publications

(46 reference statements)

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“…This effect can only occur in the absence of inversion and any mirror reflection (which is possible only in asymmetric Weyl materials) and in the absence of the product of inversion and particle-hole symmetry (which is possible only if the Weyl cones are tilted). A transverse magnetic photocurrent has also been predicted in symmetric Weyl materials with tilted cones such as TaAs [28].…”

Section: Introductionmentioning

confidence: 83%

Magnetic Photocurrents in Multifold Weyl Fermions

Kaushik,

Cano

2021

Preprint

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We examine the magneto-optical response of chiral multifold fermions. Specifically, we show that they are ideal candidates for observing the Helical Magnetic Effect (HME) previously predicted for simple Weyl fermions. Unlike Weyl fermions, the HME is present in multifold fermions even in the simplest case where the low-energy dispersion is linear and spherically symmetric. In this ideal case, we derive an analytical expression for the HME and find it is proportional to the circular photogalvanic effect; for realistic parameters and accounting for the geometry of the setup, the HME photocurrent could be roughly the same order of magnitude as the circular photogalvanic effect observed in multifold fermions. Additional non-linear and symmetry-breaking terms will ruin the quantization but not hurt the observation of the HME.

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Section: Introductionmentioning

confidence: 83%

Magnetic Photocurrents in Multifold Weyl Fermions

Kaushik,

Cano

2021

Preprint

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“…[50]. The antisymmetric parametrization of σ B ij also has found realization in some Weyl semimetals [51].…”

Section: Introductionmentioning

confidence: 85%

Symmetric and antisymmetric constitutive tensors for bi-isotropic and bi-anisotropic media

Silva¹,

Casana²,

Ferreira³

2022

Preprint

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The classical propagation of electromagnetic waves in continuous matter is described by the constitutive relations and the Maxwell equations. This work investigates the effects stemming from extended constitutive relations on the propagation of waves in bi-isotropic and bi-anisotropic media using a classical general approach, based on the evaluation of dispersion relations and refractive indices. For the bi-anisotropic media, the magnetoelectric parameters were represented by specific symmetric and antisymmetric configurations. The three cases examined have provided real and distinct refractive indices for two propagating modes, which implies birefringence. The propagating modes were also carried out in all cases. The anisotropy or birefringence effect, given by the rotatory power or phase difference, was evaluated in terms of the magnetoelectric parameters of the theory in each case. The propagation orthogonal to the vectors used to parametrize the symmetric and antisymmetric magnetoelectric tensors is described by distinct modes, which may represent a route to identify the kind of bi-anisotropic medium examined.

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“…A physical realization of the antisymmetric magnetic current examined in [68] was addressed in Ref. [69]. The constitutive relations in Eq.…”

Section: Electrodynamics In Simple Mattermentioning

confidence: 99%

Effects of CPT-odd terms of dimensions three and five on electromagnetic propagation in continuous matter

Silva,

Lisboa-Santos,

Ferreira

et al. 2021

Preprint

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In this work we study how CPT -odd Maxwell-Carroll-Field-Jackiw (MCFJ) electrodynamics as well as a dimension-5 extension of it affect the optical activity of continuous media. The starting point is dimension-3 MCFJ electrodynamics in matter whose modified Maxwell equations, permittivity tensor, and dispersion relations are recapitulated. Corresponding refractive indices are achieved in terms of the frequency and the vector-valued background field. For a purely timelike background, the refractive indices are real. Their associated propagation modes are circularly polarized and exhibit birefringence. For a purely spacelike background, one refractive index is always real and the other can be complex. The circularly polarized propagating modes may exhibit birefringence and dichroism (associated with absorption). Subsequently, we examine a dimension-five MCFJ-type electrodynamics, previously scrutinized in the literature, in a continuous medium. Following the same procedure, we find the refractive indices from a sixth-order dispersion equation. For a purely timelike background, three distinct refractive indices are obtained, one of them being real and two being complex. They are associated with two circularly polarized propagating modes that exhibit birefringence or dichroism, depending on the frequency range. Scenarios of propagation and absorption analogous to those found in dispersive dielectrics are also observed for spacelike background configurations. We conclude by comparing the dimension-three and five results and by emphasizing the richer phenomenology of the propagating modes in the higher-derivative model. Our results are applicable in the realm of Weyl semimetals.

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Transverse chiral magnetic photocurrent induced by linearly polarized light in mirror-symmetric Weyl semimetals

Cited by 13 publications

References 27 publications

Magnetic Photocurrents in Multifold Weyl Fermions

Magnetic Photocurrents in Multifold Weyl Fermions

Symmetric and antisymmetric constitutive tensors for bi-isotropic and bi-anisotropic media

Effects of CPT-odd terms of dimensions three and five on electromagnetic propagation in continuous matter

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