Polar-optic phonons and high-field electron transport in cylindrical GaAs/AlAs quantum wires

Xf, Wang; Lei, X. L.

doi:10.1103/physrevb.49.4780

Cited by 94 publications

(51 citation statements)

References 53 publications

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“…This paper presents theoretical investigations of the phonon spectrum in combined nanoheterosystems consisting of three QD's embedded into the cylindrical semiconductor QW placed into the medium. The study is performed within the dielectric continuum model widely applied in other papers [6,7] and the results of which are in good agreement with the experimental data. cylindrical quantum wire (HgS "2") placed into the external medium (vacuum "3", figure 1) are under study.…”

Section: Introductionsupporting

confidence: 66%

Confined and interface phonons in combined cylindrical nanoheterosystem

Makhanets¹,

Voitsekhivska²,

Gryschyk³

2006

Condens. Matter Phys.

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The spectra of all types of phonons existing in a complicated combined nanoheterosystem consisting of three cylindrical quantum dots embedded into the cylindrical quantum wire placed into vacuum are studied within the dielectric continuum model. It is shown that there are confined optical (LO) and interface phonons of two types: top surface optical (TSO) and side surface optical (SSO) modes of vibration in such a nanosystem. The dependences of phonon energies on the quasiwave numbers and geometrical parameters of quantum dots are investigated and analysed.

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Section: Introductionsupporting

confidence: 66%

Confined and interface phonons in combined cylindrical nanoheterosystem

Makhanets¹,

Voitsekhivska²,

Gryschyk³

2006

Condens. Matter Phys.

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“…where ze p ,m is the wave vector and the effective mass of an electron, R being the radius of the CQW, When phonons are confined in a CQW, the wave vector and frequency of them are given by [14,15]:…”

Section: The Confinement Of Electrons and Phonons In A Cylindrical Sementioning

confidence: 99%

Influence of Confined Optical Phonons and Laser Radiation on the Radioelectric Effect in a Cylindrical Semiconductor Quantum Wire with Parabolic Potential

Quang¹,

Ba²,

Long³

2017

MaP

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Based on the quantum kinetic equation method, the influence of confined optical phonons and laser radiation on the Radioelectric effect in a cylindrical semiconductor quantum wire with parabolic potential subjected to a dc electric field and a linearly polarized electromagnetic wave has been theoretically studied. The obtained analytical expression of the Radioelectric field (REF) depends on frequencies and amplitudes of the external electromagnetic waves, the quantum wire parameters, the temperature of the system, and especially the quantum numbers (n and m) which characterize the phonon confinement. Numerical calculations for the GaAs/GaAsAl quantum wire show the strongly impact of the confined optical phonons as well as the laser radiation on the REF magnitude and posture. The REF also has more resonance peaks in comparison with that in case of bulk phonon.

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“…It gives rather exact results compared to the Huang-Zhu microscopic model [4]. The calculation of electron (hole) energy renormalised due to the interaction with phonons is a sophisticated mathematical problem even within the framework of dielectric continuum model.…”

Section: Introductionmentioning

confidence: 99%

“…It is known [4] that the main model for studying the electron-phonon interaction in the simplest heterosystems (plane quantum wells [5][6], quantum wires (QW) [7][8] and quantum dots (QD) [9][10][11][12]) is the dielectric continuum model. It gives rather exact results compared to the Huang-Zhu microscopic model [4].…”

Section: Introductionmentioning

confidence: 99%

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ELECTRON- AND HOLE-PHONON INTERACTION IN QUANTUM DOT EMBEDDED INTO SEMICONDUCTOR MEDIUM (GaAs/Al_{x}Ga_{1-x}As)

Tkach¹,

Mikhalyova²,

Voitsekhivska³

et al. 2001

Condens. Matter Phys.

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The analytical and numerical calculations of electron and hole spectra renormalised by L-and I-phonons taking into account the configurational interaction are performed for the QD embedded into semiconductor medium exemplified by GaAs/Al x Ga 1−x As nanoheterosystems.It is established that for the nanosize QDs the shifts of electron and hole ground levels are created by the interaction of these quasiparticles with Land I-phonons due to all the states of discrete and continuous spectrum. For the small QDs, the shifts of ground energy levels have strong nonlinear dependences while for the big QDs, they almost do not depend on QD radius and have the magnitude close to the shifts of ground levels in massive crystal creating QD. Due to the different effective masses of light and heavy holes, the splittings of their ground levels are the complicated functions on QD radius and Al concentration in Al x Ga 1−x As medium.

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Polar-optic phonons and high-field electron transport in cylindrical GaAs/AlAs quantum wires

Cited by 94 publications

References 53 publications

Confined and interface phonons in combined cylindrical nanoheterosystem

Confined and interface phonons in combined cylindrical nanoheterosystem

Influence of Confined Optical Phonons and Laser Radiation on the Radioelectric Effect in a Cylindrical Semiconductor Quantum Wire with Parabolic Potential

ELECTRON- AND HOLE-PHONON INTERACTION IN QUANTUM DOT EMBEDDED INTO SEMICONDUCTOR MEDIUM (GaAs/Al_{x}Ga_{1-x}As)

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