Traversal times and charge confinement for spatially dependent effective masses within semiconductor heterostructures: the quantum potential approach

2002 ◽  
Vol 63 (1-3) ◽  
pp. 97-103 ◽  
Author(s):  
John R. Barker ◽  
Jeremy R. Watling
1987 ◽  
Vol 121 (3) ◽  
pp. 105-110 ◽  
Author(s):  
C. Dewdney ◽  
P.R. Holland ◽  
A. Kyprianidis

2005 ◽  
Vol 4 (1-2) ◽  
pp. 57-61 ◽  
Author(s):  
Shaikh S. Ahmed ◽  
Dragica Vasileska ◽  
Clemens Heitzinger ◽  
Christian Ringhofer

Nature ◽  
1985 ◽  
Vol 315 (6017) ◽  
pp. 294-297 ◽  
Author(s):  
D. J. Bohm ◽  
C. Dewdney ◽  
B. H. Hiley

1984 ◽  
Vol 14 (3) ◽  
pp. 255-274 ◽  
Author(s):  
D. Bohm ◽  
B. J. Hiley

Author(s):  
A. M. Elabsy ◽  
H. G. Abdelwahed

In this work we calculate the transmission coefficients for tunneling of electrons and holes through biased triple barriers (double-wells) semiconductor heterostructures (TBSH’s), composed of Ga1−xAlxAs–GaAs–Ga1−xAlxAs with x = 0.45. The calculations are based on the effective mass theory that employs the spatial effective masses and the temperature dependent of the material parameters that constitute the heterostructure. The transverse motions of carriers are also considered. In the analysis the Airy’s function formalism is taken into account. It is found that, the resonant transmission energies for both electrons and holes are decreased by enhancing the applied voltage. Also, the total resonant transmission energies for the tunneling carriers are deviated toward higher energies, as the temperature is increased. Therefore, these devices should be operated at low temperatures. Furthermore, the present work shows a discrepancy in resonant transmission energies with those reported ones, due to ignoring the effect of temperature.


2021 ◽  
Vol 6 (2) ◽  
pp. 14
Author(s):  
Sara Conti ◽  
Andrea Perali ◽  
François M. Peeters ◽  
David Neilson

Superfluidity has been predicted and now observed in a number of different electron-hole double-layer semiconductor heterostructures. In some of the heterostructures, such as GaAs and Ge-Si electron-hole double quantum wells, there is a strong mismatch between the electron and hole effective masses. We systematically investigate the sensitivity to unequal masses of the superfluid properties and the self-consistent screening of the electron-hole pairing interaction. We find that the superfluid properties are insensitive to mass imbalance in the low density BEC regime of strongly-coupled boson-like electron-hole pairs. At higher densities, in the BEC-BCS crossover regime of fermionic pairs, we find that mass imbalance between electrons and holes weakens the superfluidity and expands the density range for the BEC-BCS crossover regime. This permits screening to kill the superfluid at a lower density than for equal masses.


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