Shallow-donor impurity in coupled GaAs/Ga1−xAlxAs quantum well wires: hydrostatic pressure and applied electric field effects
نویسندگان
چکیده
منابع مشابه
Hydrostatic Pressure and Electric-field Effects on the Shallow Donor Impurity States in GaAs-Ga0.7Al0.3As Quantum-well Wires
Using a variational procedure within the effective-mass approximation, we have made a theoretical study of the effects of hydrostatic pressure and applied electric fields on the binding energy of a shallow-donor impurity in square-transversal section GaAs-Ga0.7Al0.3As quantum-well wires. The electric field is applied in a plane of the transversal section of the wire and many angular directions ...
متن کاملDonor impurity-related linear and nonlinear intraband optical absorption coefficients in quantum ring: effects of applied electric field and hydrostatic pressure
: The linear and nonlinear intraband optical absorption coefficients in GaAs three-dimensional single quantum rings are investigated. Taking into account the combined effects of hydrostatic pressure and electric field, applied along the growth direction of the heterostructure, the energies of the ground and first excited states of a donor impurity have been found using the effective mass approx...
متن کاملPolaron effects on the energy of a hydrogenic donor impurity in GaAs-(Ga, Al)As quantum-well wires
In this work using the effective-mass approximation within a variational approach we study the effect of the 3D longitudinal optical phonons on the energy of a shallow donor impurity in a GaAs–(Ga,Al)As quantum-well wire with a magnetic field applied in the wireaxis direction. We obtain the energy of the lower impurity states as a function of the wire radius, the donor position inside the wire,...
متن کاملExciton-related nonlinear optical properties in cylindrical quantum dots with asymmetric axial potential: combined effects of hydrostatic pressure, intense laser field, and applied electric field
: The exciton binding energy of an asymmetrical GaAs-Ga1-xAlxAs cylindrical quantum dot is studied with the use of the effective mass approximation and a variational calculation procedure. The influence on this quantity of the application of a direct-current electric field along the growth direction of the cylinder, together with that of an intense laser field, is particularly considered. The r...
متن کاملTunneling effects on impurity spectral function in coupled asymmetric quantum wires
The impurity spectral function is studied in coupled double quantum wires at finite temperatures. Simple anisotropy in the confinement direction of the wires leads to finite non-diagonal elements of the impurity spectral function matrix. These non-diagonal elements are responsible for tunneling effects and result in pronounced extra peak in the impurity spectral function up to temperatures as h...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: physica status solidi (b)
سال: 2010
ISSN: 0370-1972,1521-3951
DOI: 10.1002/pssb.200945519