scholarly journals Hydrostatic pressure and electric field effect on electronic states in double quantum rings

1899 ◽  
Author(s):  
H. M. Baghramyan ◽  
H. M. Baghramyan ◽  
M. G. Barseghyan ◽  
M. G. Barseghyan ◽  
C. A. Duque ◽  
...  
Keyword(s):  
Hydrostatic Pressure ◽  
Electric Field ◽  
Field Effect ◽  
Electronic States ◽  
Double Quantum ◽  
Electric Field Effect ◽  
Quantum Rings

BUILT-IN ELECTRIC FIELD EFFECT ON DONOR IMPURITIES IN STRAINED WURTZITE GaN/AlGaN ASYMMETRIC DOUBLE QUANTUM WELLS

2012 ◽  
Vol 26 (26) ◽  
pp. 1250172 ◽  
Author(s):  
JUN ZHU ◽  
SHI LIANG BAN ◽  
SI HUA HA
Keyword(s):  
Variational Method ◽  
Electric Field ◽  
Quantum Wells ◽  
Ground State ◽  
Field Effect ◽  
Binding Energies ◽  
Double Quantum ◽  
Electric Field Effect ◽  
Material Parameters ◽  
Asymmetric Double Quantum Wells

The ground state binding energies of donor impurities in strained [0001]-oriented wurtzite GaN / Al x Ga 1-x N asymmetric double quantum wells are investigated using a variational method combined with numerical computation. The built-in electric field due to the spontaneous and strain-induced piezoelectric polarization and the strain modification on material parameters are taken into account. The variations of binding energies versus the width of central barrier, the ratio of two well widths, and the impurity position are presented, respectively. It is found that the built-in electric field causes a mutation of binding energies with increasing the width of central barrier to some value. The results for symmetrical double quantum wells and without the built-in electric field are also discussed for comparison.

External electric field effect on the binding energy of a hydrogenic donor impurity in InGaAsP/InP concentric double quantum rings

2018 ◽  
Vol 32 (11) ◽  
pp. 1850138 ◽  
Author(s):  
Min Hu ◽  
Hailong Wang ◽  
Qian Gong ◽  
Shumin Wang
Keyword(s):  
Binding Energy ◽  
Electric Field ◽  
External Electric Field ◽  
Double Quantum ◽  
Electric Field Effect ◽  
Donor Impurity ◽  
Quantum Rings ◽  
Hydrogenic Donor Impurity ◽  
Hydrogenic Donor ◽  
Peak Value

Within the framework of effective-mass envelope-function theory, the ground state binding energy of a hydrogenic donor impurity is calculated in the InGaAsP/InP concentric double quantum rings (CDQRs) using the plane wave method. The effects of geometry, impurity position, external electric field and alloy composition on binding energy are considered. It is shown that the peak value of the binding energy appears in two rings with large gap as the donor impurity moves along the radial direction. The binding energy reaches the peak value at the center of ring height when the donor impurity moves along the axial direction. The binding energy shows nonlinear variation with the increase of ring height. With the external electric field applied along the z-axis, the binding energy of the donor impurity located at z[Formula: see text] decreases while that located at z[Formula: see text] increases. In addition, the binding energy decreases with increasing Ga composition, but increases with the increasing As composition.

scholarly journals Electric field effect on the thermal conductivity of wurtzite GaN

2021 ◽  
Vol 118 (16) ◽  
pp. 162110
Author(s):  
Yujie Quan ◽  
Sheng-Ying Yue ◽  
Bolin Liao
Keyword(s):  
Thermal Conductivity ◽  
Electric Field ◽  
Field Effect ◽  
Electric Field Effect

Electric Field Effect on the Imaginary Part of the Dielectric Function in Highly Anisotropic Crystals

1974 ◽  
Vol 36 (1) ◽  
pp. 179-186 ◽  
Author(s):  
Yoshiro Sasaki ◽  
Chihiro Hamaguchi ◽  
Akihiro Morotani ◽  
Junkichi Nakai
Keyword(s):  
Electric Field ◽  
Dielectric Function ◽  
Imaginary Part ◽  
Field Effect ◽  
Electric Field Effect
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