Einstein relation in quantum wires of small-gap materials in the presence of crossed electric and magnetic fields

1990 ◽  
Author(s):  
Kamakhya P. Ghatak ◽  
Manabendra Mondal ◽  
Sankar Bhattacharyya
Keyword(s):  
Magnetic Fields ◽  
Quantum Wires ◽  
Einstein Relation ◽  
Electric And Magnetic Fields

PHONON CONFINEMENT EFFECT ON THE BINDING ENERGY OF A HYDROGENIC IMPURITY IN QUANTUM WIRES IN THE ELECTRIC AND MAGNETIC FIELDS

2012 ◽  
Vol 15 ◽  
pp. 184-190
Author(s):  
ABBAS SHAHBANDARI
Keyword(s):  
Binding Energy ◽  
Magnetic Fields ◽  
Quantum Wires ◽  
Polar Optical Phonon ◽  
Phonon Confinement ◽  
Hydrogenic Impurity ◽  
Bound Polaron ◽  
Electric And Magnetic Fields ◽  
Applied Fields ◽  
Variation Technique

The effect of phonon confinement on ground state binding energy of bound polaron in polar quantum wires with a finite confining potential investigated by Landau-Pekar variation technique. The effect of external electric and magnetic fields is taken into account as well. The obtained results show that the polar optical phonon confinement leads to a considerable enhancement of the polaron effect and these corrections increase with increasing of applied fields.

scholarly journals Влияние электрического и магнитного полей на межзонную люминесценцию в полупроводниковых квантовых проволоках

2019 ◽  
Vol 127 (11) ◽  
pp. 828
Author(s):  
Э.П. Синявский ◽  
Н.С. Костюкевич
Keyword(s):  
Magnetic Fields ◽  
Luminescence Intensity ◽  
Potential Model ◽  
Quantum Wires ◽  
Acoustic Vibrations ◽  
Comparison With Experiment ◽  
Parabolic Potential ◽  
Long Wave ◽  
Electric And Magnetic Fields ◽  
Frequency Dependences

We theoretically investigated interband optical transitions in quantum wires in a parabolic potential model in electric and magnetic fields directed perpendicular to the axis of the nanowire. The frequency dependences of the light luminescence intensity are calculated taking into account the interaction of carriers with a rough surface and with long-wave acoustic vibrations. We obtained graphs of the frequency dependence of the luminescence intensity for various values ​​of the electric and magnetic fields, the dependence of the half-width of luminescence on the radius of the wire, and we also made a comparison with experiment.

Movement of charge carriers in electric and magnetic fields

2020 ◽  
pp. 89-126
Author(s):  
Hermann Kolanoski ◽  
Norbert Wermes
Keyword(s):  
Magnetic Fields ◽  
Transport Equation ◽  
Approximate Solutions ◽  
Critical Energy ◽  
Charge Carriers ◽  
Einstein Relation ◽  
Boltzmann Transport ◽  
Electric And Magnetic Fields ◽  
Electrons And Ions ◽  
And Diffusion

For the detection of charged particles many detector principles exploit the ionisation in sensing layers and the collection of the generated charges by electrical fields on electrodes, from where the signals can be deduced. In gases and liquids the charge carriers are electrons and ions, in semiconductors they are electrons and holes. To describe the ordered and unordered movement of the charge carriers in electric and magnetic fields the Boltzmann transport equation is introduced and approximate solutions are derived. On the basis of the transport equation drift and diffusion are discussed, first in general and then for applications to gases and semiconductors. It turns out that, at least for the simple approximations, the treatment for both media is very similar, for example also for the description of the movement in magnetic fields (Lorentz angle and Hall effect) or of the critical energy (Nernst-Townsend-Einstein relation).

scholarly journals Оптические свойства легированных нанопроволок во внешних электрическом и магнитном поляx

2020 ◽  
Vol 128 (11) ◽  
pp. 1752
Author(s):  
Э.П. Синявский ◽  
С.М. Соковнич
Keyword(s):  
Magnetic Fields ◽  
Absorption Coefficient ◽  
Light Absorption ◽  
Quantum Wires ◽  
Impurity Absorption ◽  
Light Absorption Coefficient ◽  
Electric And Magnetic Fields ◽  
Absorption Of Light ◽  
Zero Range ◽  
Frequency Dependences

The impurity absorption of light in quantum wires in the presence of external electric and magnetic fields directed parallel to each other and perpendicular to the axis of the nanowire is studied theoretically. Impurities doped in a quantum wire are modeled by a zero-range potential. Expressions are obtained for the light absorption coefficient and the features of impurity absorption of light are studied for all possible directions of polarization of the light wave. In particular, in the presence of external fields, some optical transitions, which are forbidden in the absence of fields, become allowed. The frequency dependences of the light absorption coefficient and the influence of electric and magnetic fields on the value of the impurity light absorption coefficient are investigated. The possibility of controlling the optical characteristics of nanowires using an electric field is shown.

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