Surface plasmonics of Weyl semimetals

Lü, Xin; Mukherjee, Dibya Kanti; Goerbig, M. O.

doi:10.1103/physrevb.104.155103

Cited by 7 publications

(4 citation statements)

References 38 publications

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“…In addition, topological semimetals are theoretically predicted to support rich electrodynamics resulting in unconventional propagation of light. − This includes tunable response to external perturbations such as heat or magnetic fields, as well as hyperbolic dispersion. For example, Cd 3 As 2 shows thermo-optic shifts larger than conventional III–V semiconductors, while Co 3 Sn 2 S 2 exhibits giant magneto-optical response.…”

Section: Topological Materials For Metamaterialsmentioning

confidence: 99%

Topological Insulator Metamaterials

et al. 2023

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In recent years, this approach has been extended to the realm of topological materials, providing a new avenue to access nontrivial features of their electronic band structure. In this review, we survey various topological material classes from a photonics standpoint, including crystal growth and lithographic structuring methods. We discuss how exotic electronic features such as spin-selective Dirac plasmon polaritons in topological insulators or hyperbolic plasmon polaritons in Weyl semimetals may give rise to unconventional magneto-optic, nonlinear, and circular photogalvanic effects in metamaterials across the visible to infrared spectrum. Finally, we dwell on how these effects may be dynamically controlled by applying external perturbations in the form of electric and magnetic fields or ultrafast optical pulses. Through these examples and future perspectives, we argue that topological insulator, semimetal and superconductor metamaterials are unique systems to bridge the missing links between nanophotonic, electronic, and spintronic technologies.

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Section: Topological Materials For Metamaterialsmentioning

confidence: 99%

Topological Insulator Metamaterials

et al. 2023

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“…In contrast, the scenario shifts in WSMs where time-reversal symmetry is broken, mandating a minimum of two Weyl cones. This preface sets the stage for a nuanced understanding of how distinct symmetrical conditions shape the unique characteristics of Weyl semimetals, unraveling the intricacies inherent in their symmetrical configurations [2].…”

Section: Introductionmentioning

confidence: 99%

“…The dispersion relation of electrons in WSMs near the Weyl points is linear. For example, the dispersion of bulk plasmons in WSMs is parabolic in momentum with gaps, while it follows a square root IOP Publishing doi:10.1088/1742-6596/2780/1/012028 2 dispersion without gaps in graphene [4]. The chiral anomaly in WSMs occurs in bulk plasmons whose dispersion depends on the chemical potential resolved by chirality.…”

Section: Introductionmentioning

confidence: 99%

Effect of Scattering Rate and Thickness Variation on the Propagation of Surface Plasmon Polariton (SPP) in Topological Weyl Semimetals Waveguide

Utami,

Majidi,

Ukhtary

et al. 2024

J. Phys.: Conf. Ser.

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Weyl semimetals have emerged as a captivating subject, drawing considerable interest and widespread attention. Their appeal lies in the anomalous nature of their band structure and distinctive topological properties, setting them apart from the characteristics exhibited by other materials. We investigate the surface plasmon polariton (SPP) of a waveguide made of two layers of Weyl semimetals sandwiching a dielectric material incorporating the effect of electron scattering rate. We calculate the frequency dispersion relation by solving the boundary conditions of the electromagnetic fields in the Maxwell’s equations. Furthermore, we analyze the effect of the electron scattering rate and thickness variation of the propagation length of SPP. Increasing the scattering rate causes a broadening effect on the plasmon dispersion spectrum and propagation length. The larger value of the thickness tends to make the propagation length larger.

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“…Multi-Weyl semimetals have been predicted to show many interesting properties such as chiral effects, anomalous transport phenomena and distinct optical signatures [59][60][61][62][63][64][65][66][67][68][69][70][71][72][73]. There have been a number of interesting recent studies on optical response of Weyl semimetals [74][75][76][77][78][79][80][81][82]. Weyl semimetals are a special class of materials that have strong spin-orbit coupling that modulates band anti-crossings and band inversion to give large BCD and strong non-linear Hall effects.…”

Section: Introductionmentioning

confidence: 99%

Non-linear Hall effect in multi-Weyl semimetals

Roy¹,

Narayan²

2022

J. Phys.: Condens. Matter

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In the presence of time reversal symmetry, a non-linear Hall effect can occur in systems without an inversion symmetry. One of the prominent candidates for detection of such Hall signals are Weyl semimetals. In this article, we investigate the Berry curvature induced second and third order Hall effect in multi-Weyl semimetals with topological charges n = 1, 2, 3. We use low energy effective models to obtain general analytical expressions and discover the presence of a large Berry curvature dipole in multi-Weyl semimetals, compared to usual (n = 1) Weyl semimetals. We also study the Berry curvature dipole in a realistic tight-binding lattice model and observe two different kinds of variation with increasing topological charge – these can be attributed to different underlying Berry curvature components. We provide estimates of the signatures of second harmonic of Hall signal in multi-Weyl semimetals, which can be detected experimentally. Furthermore, we predict the existence of a third order Hall signal in multi-Weyl semimetals. We derive the analytical expressions of Berry connection polarizability tensor, which is responsible for third order effects, using a low energy model and estimate the measurable conductivity. Our work can help guide experimental discovery of Berry curvature multipole physics in multi-Weyl semimetals.

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Surface plasmonics of Weyl semimetals

Cited by 7 publications

References 38 publications

Topological Insulator Metamaterials

Topological Insulator Metamaterials

Effect of Scattering Rate and Thickness Variation on the Propagation of Surface Plasmon Polariton (SPP) in Topological Weyl Semimetals Waveguide

Non-linear Hall effect in multi-Weyl semimetals

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