Signature of miniband nodes in magneto-optical properties of one-dimensional superlattice of planar quantum rings

Mansoury, Maryam; Aziz-Aghchegala, Vigen; Mughnetsyan, Vram; Kirakosyan, A.A.; Guðmundsson, Viðar

doi:10.1016/j.physleta.2022.128324

Cited by 2 publications

(2 citation statements)

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“…If one expresses the magnetic flux per UC of the SL as 𝛷 𝛷 0 ⁄ = 𝑝𝑞 ℎ 1 ℎ 2 ⁄ , where 𝑝, 𝑞, ℎ 1 and ℎ 2 are integers, the lattice vectors satisfying this condition should be expressed as follows: 𝑹 𝟏 = ℎ 1 𝒂 𝟏 and 𝑹 𝟐 = ℎ 2 𝒂 𝟐 . As is shown in [8] a complete set of basis functions can be constructed out using the primitive magnetotranslations 𝑆(𝒄) and 𝑆(𝒅) with 𝒄 = 𝑹 𝟏 𝑝 ⁄ and 𝒅 = 𝑹 𝟐 𝑝 ⁄ :…”

Section: ․ Theoretical Frameworkmentioning

confidence: 99%

“…To overcome this obstacle, we develop our theoretical study using the basis functions proposed initially by Ferrari [7] and subsequently used by others. This approach allows us to take into account the effect of the magnetic field on the degree of confinement of electrons in each QD, as well as on the tunneling of 2D electrons between different QDs [8]. Based on this method, we investigate the electronic states and the absorption coefficient of honeycomb artificial graphene-like lattices composed of cylindrical and elliptical QDs.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Magneto-Optical Properties of Arrayed Structures of Cylindrical and Elliptical Quantum Dots

YEGANYAN,

MANSOURY,

MUGHNETSYAN

2023

NANOCON Conference Proeedings

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In this paper we present a comparative study of the magneto-optical properties of quasi-two-dimensional electrons in a graphene-like semiconductor superlattice composed of circular and elliptical quantum dots. The effect of transverse magnetic field on the band structure and absorption coefficient of the considered structures is studied. To this end a complete set of orthogonal basis functions is constructed in the symmetric gauge of the vector potential. This basis reflects both the periodicity of the system and magnetic phase effects due to the translations between the sites of the superlattice. Our calculations indicate on a topological change in the miniband structure due to the ellipticity of the quantum dots, and non-trivial modifications of the electron energy dispersion surfaces in the reciprocal space with the change of the number of magnetic flux quanta through the unit cell of the superlattice. The obtained results indicate the opportunity for an effective control of the magnetic and optical characteristics of honeycomb arrays of QDs through geometry effects and external magnetic field.

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Section: ․ Theoretical Frameworkmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%