The effects of temperature and hydrostatic pressure on the photoionization cross-section and binding energy of impurities in quantum-well wires

2010 ◽  
Vol 48 (1) ◽  
pp. 106-113 ◽  
Author(s):  
U. Yesilgul ◽  
S. Şakiroğlu ◽  
E. Kasapoğlu ◽  
H. Sari ◽  
I. Sökmen
Keyword(s):  
Hydrostatic Pressure ◽  
Binding Energy ◽  
Quantum Well ◽  
Cross Section ◽  
Photoionization Cross Section ◽  
Quantum Well Wires ◽  
Effects Of Temperature

THE EFFECTS OF TEMPERATURE AND HYDROSTATIC PRESSURE ON THE DIAMAGNETIC SUSCEPTIBILITY OF A DONOR IN A QUANTUM WELL

2011 ◽  
Vol 18 (05) ◽  
pp. 147-152 ◽  
Author(s):  
U. YESILGUL ◽  
F. UNGAN ◽  
E. KASAPOGLU ◽  
H. SARI ◽  
I. SÖKMEN
Keyword(s):  
Hydrostatic Pressure ◽  
Binding Energy ◽  
Quantum Well ◽  
Effective Mass ◽  
Diamagnetic Susceptibility ◽  
Effective Mass Approximation ◽  
Mass Approximation ◽  
Hydrogenic Donor ◽  
Different Temperatures ◽  
Effects Of Temperature

Using the effective-mass approximation within a variational scheme, we have calculated the diamagnetic susceptibility and binding energy of a hydrogenic donor in a quantum well under different temperatures and hydrostatic pressure conditions. Our calculation have revealed the dependence of the diamagnetic susceptibility and the impurity binding on temperature and hydrostatic pressure.

Binding energies and photoionization cross-sections of donor impurities in GaN/AlxGa1−xN spherical quantum dot under hydrostatic pressure

2020 ◽  
Vol 34 (14) ◽  
pp. 2050153
Author(s):  
Shuo Li ◽  
Lei Shi ◽  
Zu-Wei Yan
Keyword(s):  
Hydrostatic Pressure ◽  
Binding Energy ◽  
Quantum Dot ◽  
Cross Section ◽  
Cross Sections ◽  
Photoionization Cross Section ◽  
Binding Energies ◽  
Core Shell ◽  
Core Size ◽  
Shell Size

In this paper, the binding energy and photoionization cross-section of donor impurity state in [Formula: see text] quantum dot structure are studied theoretically by using variational method. The variation of binding energy and photoionization cross-section with core and shell sizes at different impurity locations under hydrostatic pressure is calculated numerically. The results show that the binding energy decreases monotonously with the core size at different impurity locations for [Formula: see text] core/shell quantum dot. In contrast, for the inverted core/shell quantum dot, the binding energy exhibits different trends with the increase of core size at different impurity locations. But the binding energy decreases monotonically with the shell size for both of them. Moreover, when the photon energy is approximately equal to the donor binding energy, the peak of the photoionization cross-section appears. There will be different peak shifts under different conditions, and its peak intensity increases with the increase of core and shell sizes. When the hydrostatic pressure is applied, the binding energy and the peak strength of the photoionization cross-section increase with the increase of the pressure.

Sign in / Sign up

Export Citation Format

Share Document