Controllable nonreciprocal optical response and handedness-switching in
magnetized spin orbit coupled graphene
- URL: http://arxiv.org/abs/2201.01779v2
- Date: Sat, 26 Feb 2022 11:11:02 GMT
- Title: Controllable nonreciprocal optical response and handedness-switching in
magnetized spin orbit coupled graphene
- Authors: Mohammad Alidoust, Klaus Halterman
- Abstract summary: We calculate the dynamical optical conductivity and permittivity tensor of a magnetized graphene layer with Rashba spin orbit coupling (SOC)
Our results reveal a transverse Hall conductivity correlated with the usual nonreciprocal longitudinal conductivity.
It is found that the magnetized spin orbit coupled graphene supports strong handedness-switchings, effectively controlled by varying the chemical potential and magnetization strength with respect to the SOC strength.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Starting from a low-energy effective Hamiltonian model, we theoretically
calculate the dynamical optical conductivity and permittivity tensor of a
magnetized graphene layer with Rashba spin orbit coupling (SOC). Our results
reveal a transverse Hall conductivity correlated with the usual nonreciprocal
longitudinal conductivity. Further analysis illustrates that for intermediate
magnetization strengths, the relative magnitudes of the magnetization and SOC
can be identified experimentally by two well-separated peaks in the dynamical
optical response (both the longitudinal and transverse components) as a
function of photon frequency. Moreover, the frequency dependent permittivity
tensor is obtained for a wide range of chemical potentials and magnetization
strengths. Employing experimentally realistic parameter values, we calculate
the circular dichroism of a representative device consisting of magnetized spin
orbit coupled graphene and a dielectric insulator layer, backed by a metallic
plate. The results reveal that this device has different relative
absorptivities for right-handed and left-handed circularly polarized
electromagnetic waves. It is found that the magnetized spin orbit coupled
graphene supports strong handedness-switchings, effectively controlled by
varying the chemical potential and magnetization strength with respect to the
SOC strength.
Related papers
- Spectroscopy of elementary excitations from quench dynamics in a dipolar XY Rydberg simulator [3.0425972371602326]
We use a Rydberg quantum simulator to demonstrate a new form of spectroscopy, called quench spectroscopy.
We illustrate the method on a two-dimensional simulation of the spin-1/2 dipolar XY model.
arXiv Detail & Related papers (2023-11-20T12:47:01Z) - Probing dynamics of a two-dimensional dipolar spin ensemble using single
qubit sensor [62.997667081978825]
We experimentally investigate individual spin dynamics in a two-dimensional ensemble of electron spins on the surface of a diamond crystal.
We show that this anomalously slow relaxation rate is due to the presence of strong dynamical disorder.
Our work paves the way towards microscopic study and control of quantum thermalization in strongly interacting disordered spin ensembles.
arXiv Detail & Related papers (2022-07-21T18:00:17Z) - Measuring the magnon-photon coupling in shaped ferromagnets: tuning of
the resonance frequency [50.591267188664666]
cavity photons and ferromagnetic spins excitations can exchange information coherently in hybrid architectures.
Speed enhancement is usually achieved by optimizing the geometry of the electromagnetic cavity.
We show that the geometry of the ferromagnet plays also an important role, by setting the fundamental frequency of the magnonic resonator.
arXiv Detail & Related papers (2022-07-08T11:28:31Z) - Optical sensing of magnons via the magnetoelastic displacement [7.298195012362328]
We show how to measure a steady-state magnon population in a magnetostatic mode of a ferromagnet or ferrimagnet, such as yttrium iron garnet.
We adopt an optomechanical approach and utilize the magnetoelasticity of the ferromagnet.
arXiv Detail & Related papers (2021-11-16T11:23:46Z) - Controlled coherent dynamics of [VO(TPP)], a prototype molecular nuclear
qudit with an electronic ancilla [50.002949299918136]
We show that [VO(TPP)] (vanadyl tetraphenylporphyrinate) is a promising system suitable to implement quantum computation algorithms.
It embeds an electronic spin 1/2 coupled through hyperfine interaction to a nuclear spin 7/2, both characterized by remarkable coherence.
arXiv Detail & Related papers (2021-03-15T21:38:41Z) - Effects of the dynamical magnetization state on spin transfer [68.8204255655161]
We show that the complex interactions between the spin-polarized electrons and the dynamical states of the local spins can be decomposed into separate processes.
Our results suggest that exquisite control of spin transfer efficiency and of the resulting dynamical magnetization states may be achievable.
arXiv Detail & Related papers (2021-01-21T22:12:03Z) - Photon Condensation and Enhanced Magnetism in Cavity QED [68.8204255655161]
A system of magnetic molecules coupled to microwave cavities undergoes the equilibrium superradiant phase transition.
The effect of the coupling is first illustrated by the vacuum-induced ferromagnetic order in a quantum Ising model.
A transmission experiment is shown to resolve the transition, measuring the quantum electrodynamical control of magnetism.
arXiv Detail & Related papers (2020-11-07T11:18:24Z) - Tuning resonance energy transfer with magneto-optical properties of
graphene [0.0]
We investigate the resonance energy transfer rate between two quantum emitters near a suspended graphene sheet in vacuum.
Due to the extraordinary magneto-optical response of graphene, it allows for an active control and tunability of the RET.
Our results suggest that magneto-optical media may take the manipulation of energy transfer between quantum emitters to a whole new level.
arXiv Detail & Related papers (2020-10-19T20:15:55Z) - Cavity magnon polariton based precision magnetometry [0.0]
A photon-magnon hybrid system can be realised by coupling the electron spin resonance of a magnetic material to a microwave cavity mode.
quasiparticles associated with the system dynamics are the cavity magnon polaritons.
We employ hybrid systems composed of microwave cavities and ferrimagnetic spheres, to experimentally implement two types of novel spin-magnetometers.
arXiv Detail & Related papers (2020-08-07T09:51:16Z) - Energy and momentum conservation in spin transfer [77.34726150561087]
We show that energy and linear momentum conservation laws impose strong constraints on the properties of magnetic excitations induced by spin transfer.
Our results suggest the possibility to achieve precise control of spin transfer-driven magnetization dynamics.
arXiv Detail & Related papers (2020-04-04T15:43:30Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.