The influence of energy levels broadening on intersubband acoustic phonon scattering rates in quantum wire

2003 ◽  
Vol 319 (3-4) ◽  
pp. 379-383 ◽  
Author(s):  
V.M. Borzdov ◽  
V.O. Galenchik ◽  
F.F. Komarov ◽  
D.V. Pozdnyakov ◽  
O.G. Zhevnyak
Keyword(s):  
Quantum Wire ◽  
Acoustic Phonon ◽  
Phonon Scattering ◽  
Energy Levels ◽  
Scattering Rates

Conductivity Tensor in Cylindrical Quantum Wire with Parabolic Potential for the Case of Electron-Acoustic Phonon Scattering

2022 ◽  
Vol 1048 ◽  
pp. 205-211
Author(s):  
Hoang Van Ngoc
Keyword(s):  
External Field ◽  
Quantum Wire ◽  
Acoustic Phonon ◽  
Phonon Scattering ◽  
Quantum Wires ◽  
Kinetic Equations ◽  
Conductivity Tensor ◽  
Field Frequency ◽  
Parabolic Potential ◽  
Electron Acoustic

Conductivity tensor is an important concept in materials, this work studies conductivity tensors in cylindrical quantum wires with parabolic potential in the presence of two external fields, a linearly polarized electromagnetic wave, and a laser field. This work is also only considered for the case of electron-acoustic phonon scattering. Research results are obtained by using quantum kinetic equations for the carrier system in a quantum wire. The conductivity tensor is calculated by solving the quantum kinetic equation of the system, which is a function of the external field frequency, the external field amplitude, the temperature of the helium, and parameters specific to the quantum wire. Results will also be examined and plotted for quantum wire GaAs / GaAsAl.

Electron–acoustic-phonon scattering rates in cylindrical quantum wires

1995 ◽  
Vol 51 (7) ◽  
pp. 4695-4698 ◽  
Author(s):  
SeGi Yu ◽  
K. W. Kim ◽  
Michael A. Stroscio ◽  
G. J. Iafrate
Keyword(s):  
Acoustic Phonon ◽  
Phonon Scattering ◽  
Quantum Wires ◽  
Electron Acoustic ◽  
Scattering Rates

Acoustic-phonon scattering in a rectangular quantum wire

1993 ◽  
Vol 48 (23) ◽  
pp. 17194-17201 ◽  
Author(s):  
R. Mickevičius ◽  
V. Mitin
Keyword(s):  
Quantum Wire ◽  
Acoustic Phonon ◽  
Phonon Scattering

Electron–acoustic-phonon scattering rates in rectangular quantum wires

1994 ◽  
Vol 50 (3) ◽  
pp. 1733-1738 ◽  
Author(s):  
SeGi Yu ◽  
K. W. Kim ◽  
Michael A. Stroscio ◽  
Gerald J. Iafrate ◽  
Arthur Ballato
Keyword(s):  
Acoustic Phonon ◽  
Phonon Scattering ◽  
Quantum Wires ◽  
Electron Acoustic ◽  
Rectangular Quantum Wires ◽  
Scattering Rates

scholarly journals Thermal Conductivity of BAs under Pressure

2021 ◽  
Author(s):  
Songrui Hou ◽  
Bo Sun ◽  
Fei Tian ◽  
Qingan Cai ◽  
Youming Xu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Pressure Dependence ◽  
Acoustic Phonon ◽  
Density Functional ◽  
Phonon Scattering ◽  
Ambient Pressure ◽  
Functional Theory ◽  
Small Phase ◽  
Diamond Anvil ◽  
Scattering Rates

Abstract Boron arsenide (BAs) is an ultrahigh-thermal-conductivity material with special phonon-phonon scattering behaviors. At ambient pressure, the bunching of acoustic phonon branches in BAs is believed to result in a small phase space for three-phonon scattering. Density functional theory predicts that this acoustic phonon bunching effect is sensitive to pressure and leads to an unusual pressure dependence of thermal conductivity. To explore this physics, we measure the thermal conductivity of BAs from 0 to 25 GPa using time-domain thermoreflectance in a diamond anvil cell. We characterized two BAs samples with ambient thermal conductivities of 350 and 480 W m-1 K-1. Our experiments show that the thermal conductivity of both samples depends weakly on pressure from 0 to 25 GPa. We attribute the weak pressure dependence of the thermal conductivity of BAs to the weak pressure dependence of total phonon-phonon scattering rates. Our experimental results are consistent with DFT predictions that three-phonon scattering rates increase from 0 to 25 GPa, while four-phonon scattering rates decrease.

One-dimensional cylindrical quantum wire: The theoretical study of photo-stimulated Ettingshausen effect

2021 ◽  
Author(s):  
Hoang Van Ngoc ◽  
Nguyen Quang Bau ◽  
Doan Minh Quang ◽  
Tran Hai Hung
Keyword(s):  
Magnetic Field ◽  
Optical Phonon ◽  
Quantum Wire ◽  
Acoustic Phonon ◽  
Phonon Scattering ◽  
Resonance Effect ◽  
One Dimensional ◽  
Ettingshausen Effect ◽  
Electron Acoustic ◽  
The Impact

Based on the quantum kinetic equation (QKE) for electron, we have theoretically studied the theory of photo-stimulated Ettingshausen effect in a one-dimensional cylindrical quantum wire (CQW). The strong electromagnetic wave (EMW) [Formula: see text] plays a role as photo-stimulation source. We obtain the analytic expressions for the kinetic tensors [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text] and the Ettingshausen coefficient (EC) in the CQW with the dependence on the amplitude and the energy of EMW, the CQW radius, the magnetic field and the temperature for two cases: optical phonon and acoustic phonon. The results are numerically evaluated and graphed for GaAs/AlGaAs CQW model. It is shown that we observe the cyclotron resonance and magneto-phonon resonance effect while surveying EC in terms of magnetic field (with and without EMW) and EMW energy, considered the electron-optical phonon scattering. In case of electron-acoustic phonon scattering, the oscillation of EC is obtained with the transition between low Landau levels (LLs). We also clarify the impact of quantum size effect (QSE) on EC by surveying the influence of EC on the radius of CQW.

Electron‐optical‐phonon scattering rates in a rectangular semiconductor quantum wire

1991 ◽  
Vol 70 (1) ◽  
pp. 319-327 ◽  
Author(s):  
K. W. Kim ◽  
M. A. Stroscio ◽  
A. Bhatt ◽  
R. Mickevicius ◽  
V. V. Mitin
Keyword(s):  
Optical Phonon ◽  
Quantum Wire ◽  
Phonon Scattering ◽  
Optical Phonon Scattering ◽  
Scattering Rates
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