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of 289
pro vyhledávání: '"Mahmoodian M"'
Illumination of a two-dimensional system by a twisted light beam is considered in order to find specific effects caused by twisting. Direct interband transitions between the valence and conduction bands are supposed. The generation rates of the elect
Externí odkaz:
http://arxiv.org/abs/2301.06798
Spin states of two-dimensional Wigner clusters are considered at low temperatures, when all electrons are in ground coordinate states. The spin subsystem behavior is determined by antiferromagnetic exchange integrals. The spin states in such a system
Externí odkaz:
http://arxiv.org/abs/2206.15026
Autor:
Jayasinghe, S.C., Mahmoodian, M., Sidiq, A., Nanayakkara, T.M., Alavi, A., Mazaheri, Sam, Shahrivar, F., Sun, Z., Setunge, S.
Publikováno v:
In Ocean Engineering 15 November 2024 312 Part 2
Autor:
Mahmoodian, M. M., Entin, M. V.
The 2D TI edge states are considered within the Volkov-Pankratov (VP) Hamiltonian. A smooth transition between TI and OI is assumed. The edge states are formed in the total gap of homogeneous 2D material. A pair of these states are of linear dispersi
Externí odkaz:
http://arxiv.org/abs/2101.05156
Autor:
Mahmoodian, M. M., Chaplik, A. V.
Publikováno v:
EPL, 133 (2021) 67003
Electron states in a quantum dot (QD) located near a 2D system of dipolar excitons are perturbed by fluctuations of the exciton density caused by the electron-exciton interaction. This results in the frequency changes of electron transitions in a QD.
Externí odkaz:
http://arxiv.org/abs/2009.05500
Autor:
Mahmoodian, M. M., Entin, M. V.
Publikováno v:
Phys. Rev. B 101, 125415 (2020)
The conductivity of a two-dimensional HgTe quantum well with a width $\sim$6.3~nm, close to the transition from ordinary to topological insulating phases, is studied. The Fermi level is supposed to get to the overall energy gap. The consideration is
Externí odkaz:
http://arxiv.org/abs/1911.09455
Autor:
Mahmoodian, M. M., Entin, M. V.
Publikováno v:
JETP Letters, Vol. 109, No. 5, 2019, pp. 331-333
The lifetime of electrons on edge states of a two-dimensional topological insulator against the background of an allowed two-dimensional band has been determined. It has been shown that this time in the case of scattering on Coulomb impurities can be
Externí odkaz:
http://arxiv.org/abs/1904.13039
Autor:
Mahmoodian, M. M., Entin, M. V.
Publikováno v:
Phys. Stat. Solidi B, 1800652 (2019)
The 2D HgTe quantum well is analyzed based on the assumption that the width fluctuations convert the system to a random mixture of domains with positive and negative energy gaps. The borders between ordinary and topological insulator phases form a ne
Externí odkaz:
http://arxiv.org/abs/1811.03298
Autor:
Mahmoodian, M. M., Chaplik, A. V.
In developing our previous contribution (arXiv:1804.00889) we have numerically found the bound state energy and correspondent wave function of the two electrons confined to move in a quantum well placed close to the gate electrode. Spin-orbit interac
Externí odkaz:
http://arxiv.org/abs/1807.10346
Autor:
Mahmoodian, M. M., Chaplik, A. V.
Publikováno v:
JETP Letters 107 (2018) 564
It is shown that two electrons located in a quantum well near a metal electrode attract each other due to the spin-orbit interaction (SOI) of the Bychkov-Rashba type and the electrostatic image forces. Using the example of a simple model, it is shown
Externí odkaz:
http://arxiv.org/abs/1804.00889