Magneto-optic modulation of lateral and angular shifts in spin-orbit coupled members of the graphene family

Shah, Muzamil; Anwar, Muhammad Sabieh

doi:10.1364/osac.388574

Cited by 23 publications

(5 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For instance, e.g. massive Dirac metals [89], honeycomb lattices [90] or Haldane model [91] demonstrate similar resonant features of the Hall conductivity.…”

Section: Discussionmentioning

confidence: 98%

Electric field effect on electron gas spins in two-dimensional magnets with strong spin-orbit coupling

Denisov

2021

Preprint

View full text Add to dashboard Cite

The recent rise of material platforms combining magnetism and two-dimensionality of mobile carriers reveals a diverse spectrum of spin-orbit phenomena and stimulates its ongoing theoretical discussions. In this work we use the density matrix approach to provide a unified description of subtle microscopic effects governing the electron gas spin behavior in the clean limit upon electric perturbations in two-dimensional magnets with strong spin-orbit coupling. We discuss that an inhomogeneity of electrostatic potential generally leads to the electron gas spin tilting with the subsequent formation of equilibrium skyrmion-like spin textures and demonstrate that several microscopic mechanisms of 2DEG spin response are equally important for this effect. We analyze the dynamics of 2DEG spin upon an oscillating electric field with a specific focus on the emergent electric dipole spin resonance. We address the resonant enhancement of magneto-optical phenomena from the spin precession equation perspective and discuss it in terms of the resonant spin generation. We also clarify the connection of both static and dynamic spin phenomena arising in response to a scalar perturbation with the electronic band Berry curvature.

show abstract

“…For instance, e.g. massive Dirac metals [89], honeycomb lattices [90] or Haldane model [91] demonstrate similar resonant features of the Hall conductivity.…”

Section: Discussionmentioning

confidence: 98%

Electric field effect on electron gas spins in two-dimensional magnets with strong spin-orbit coupling

Denisov

2021

Preprint

View full text Add to dashboard Cite

show abstract

“…It is worth noting that the reflection coefficients r ps = −r sp according to Eqs. ( 17) and (18), so that we only plot the reflection coefficients r pp , r sp , r ss . From Fig.…”

Section: Theoretical Analysismentioning

confidence: 99%

“…[4][5][6] The GH and IF effects have attracted wide attention in physics and have been studied at different interfaces in recent decades, such as hybridized topological insulator, [7] metasurface, [8,9] photonic crystal, [10,11] temporally dispersion attenuation material, [12] graphene. [13][14][15][16][17][18][19] Specifically in these studies, GH and IF shifts were tuned by magnetic field and chemical potential, [7,[17][18][19] and often used as effective probes in precision metrology of material structural parameters since they were sensitive to material properties. [15,16] Weyl semimetal (WSM), an emerging topological material who takes non-mass Weyl fermions as quasi-particles, is also known as "three-dimensional graphene".…”

Section: Introductionmentioning

confidence: 99%

Goos–Hänchen and Imbert–Fedorov shifts in tiltedWeyl semimetals

et al. 2022

View full text Add to dashboard Cite

We establish the beam models of Goos-Hänchen (GH) and Imbert-Fedorov (IF) effects in tilted Weyl semimetals (WSMs), and systematically study the influences of Weyl cone tilting and chemical potential on the GH and IF shifts at a certain photon energy 1.96 eV. It is found that the GH and IF shifts in tilted type-I and type-II WSMs both are almost symmetric about the Weyl cone tilting. Meanwhile, the GH and IF shifts in type-I WSMs almost do not change with the tilt degree of Weyl cones, while those in type-II WSMs are extremely dependent on tilt degree. These trends are mainly due to the nearly symmetric distribution of WSMs conductivities, where the conductivities keep stable in type-I WSMs and gradually decrease with tilt degree in type-II WSMs. By adjusting the chemical potential, the boundary between type-I and type-II WSMs widens, the dependence of the beam shifts on the tilt degree can be manipulated. Furthermore, by extending the relevant discussions to a wider frequency band, the peak fluctuation of GH shifts and the decrease of IF shifts occur gradually as the frequency increases, and the performance of beam shifts at photon energy 1.96 eV is equally suitable for other photon frequencies. The above findings provide a new reference for revisiting the beam shifts in tilted WSMs and determining the types of WSMs.

show abstract

“…The Fresnel reflection coefficients of the graphene-substrate system with an external applied magnetic field are given by [29][30][31][32]: (20) where,…”

Section: General Theoretical Modelmentioning

confidence: 99%

Probing topological quantum phase transitions via photonic spin Hall effects in spin-orbit coupled 2D quantum materials

Shah¹

2021

J. Phys. D: Appl. Phys.

Self Cite

View full text Add to dashboard Cite

Topological photonics is an emerging field in photonics in which various topological and geometrical ideas are used to manipulate and control the behavior of light photons. The interplay between topological matter and the spin degree of freedom of photons provides new opportunities for achieving spin-based photonics applications. In this paper, the photonic spin Hall effect (PSHE) of reflected light from the surface of the topological silicene quantum systems subjected to external electric and radiation fields in the terahertz regime is theoretically investigated. By tuning the external electric and the applied laser fields, we can drive the silicenic system through different topological quantum phase transitions. We demonstrate that the in-plane and transverse spatial spin dependent shifts exhibit extreme values near Brewster’s angles and away from the optical transition frequencies. We reveal that the photonic spin Hall shifts are sensitive to the spin and valley indices as well as to the number of closed gaps. We believe that the spin and valley-resolved PSHE will greatly impact the research in spinoptics, spintronics, and valleytronics.

show abstract

Magneto-optic modulation of lateral and angular shifts in spin-orbit coupled members of the graphene family

Cited by 23 publications

References 61 publications

Electric field effect on electron gas spins in two-dimensional magnets with strong spin-orbit coupling

Electric field effect on electron gas spins in two-dimensional magnets with strong spin-orbit coupling

Goos–Hänchen and Imbert–Fedorov shifts in tiltedWeyl semimetals

Probing topological quantum phase transitions via photonic spin Hall effects in spin-orbit coupled 2D quantum materials

Contact Info

Product

Resources

About