SHALLOW IMPURITIES IN HETEROJUNCTIONS

1992-02-01
ELKAWNI, MI
Tomak, Mehmet
The shallow impurity states in Si/SiO2 and GaAs/Ga1-xAlxAs heterojunctions are studied variationally using an improved Fang-Howard trial wave function originally proposed for the Si/SiO2 system.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS

Suggestions

IMPURITY PHOTOIONIZATION IN SEMICONDUCTORS
ILAIWI, KF; Tomak, Mehmet (1990-01-01)
The dependence of photoionization cross-section on photon energy is calculated using different impurity potentials including the Hülthén potential. The effect of anisotropy is taken into account and is shown to affect the spectral dependence drastically.
Shallow foundation analysis by smoothed particle hydrodynamics method
Emren, Volkan; Tuncay, Kağan (2021-09-08)
This paper illustrates the use of Smoothed Particle Hydrodynamics (SPH) technique to compute the bearingcapacity of shallow foundations and establish their failure mechanism. SPH is a numerical method based on aLagrangian formulation to solve partial differential equations by discretizing the computational domain with a setof particles that have field variables such as mass, and density. SPH is a meshless method and is not affected bythe particles’ arbitrariness due to its adaptive nature, and it can natura...
PHOTOIONIZATION OF IMPURITIES IN INFINITE-BARRIER QUANTUM-WELLS
ELSAID, M; Tomak, Mehmet (1991-01-01)
The dependence of the photoionization cross-section on photon energy is calculated for shallow donors in infinite-barrier GaAs/Ga(1-x)Al(x)As quantum well as a function of well width. The effect of a magnetic field is also considered.
Disorder-induced Raman scattering in ammonium halides
Yurtseven, Hasan Hamit (Informa UK Limited, 1995-01-01)
The mechanism responsible for the lambda-phase transitions in ammonium halides is investigated within the framework of an extended theory of the disorder-induced Raman scattering. The Raman spectra of ammonium halides have been predicted for both the disordered beta phase (NH4Cl and NH4Br) and the ordered gamma phase (NH4Br). It is postulated that those terms which dominate the dynamic distortions of the lattices and thereby cause the bulk of the disorder-allowed Raman scattering, will also dominate the qua...
Comparison of Artificial Neural Networks (ANN) and Adaptive Neuro-Fuzzy Inference System (ANFIS) Models in Simulating Polygalacturonase Production
UZUNER, SİBEL; Çekmecelioğlu, Deniz (2016-11-01)
The artificial neural network (ANN) method was used in comparison with the adaptive neuro-fuzzy inference system (ANFIS) to describe polygalacturonase (PG) production by Bacillus subtilis in submerged fermentation. ANN was evaluated with five neurons in the input layer, one hidden layer with 7 neurons, and one neuron in the output layer. Five fermentation variables (pH, temperature, time, yeast extract concentration, and K2HPO4 concentration) served as the input of the ANN and ANFIS models, and the polygala...
Citation Formats
M. ELKAWNI and M. Tomak, “SHALLOW IMPURITIES IN HETEROJUNCTIONS,” JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, pp. 305–308, 1992, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/44291.