Computational and theoretical studies on ZnS[x]Se[1-x] (0≤x≤1) / Ghassan H. Esa Al-Shabeeb
The aim of this work is to study a theory of the energy band gap of ZnSxSe1-x (0≤ x ≤1) materials, and to obtain the density of states (DOS) in a quantizing magnetic field. From k .p perturbation theory, momentum matrix elements and energy eigenvalue of the Zn-S-Se alloy are derived. An empiri...
| _version_ | 1848772520131428352 |
|---|---|
| author | Al-Shabeeb, Ghassan H. Esa |
| author_facet | Al-Shabeeb, Ghassan H. Esa |
| author_sort | Al-Shabeeb, Ghassan H. Esa |
| building | UM Research Repository |
| collection | Online Access |
| description | The aim of this work is to study a theory of the energy band gap of ZnSxSe1-x
(0≤ x ≤1) materials, and to obtain the density of states (DOS) in a quantizing magnetic
field. From k .p
perturbation theory, momentum matrix elements and energy eigenvalue
of the Zn-S-Se alloy are derived. An empirical relationship where
(μ*)-1=(mc)-1+(mv)-1, and mc, mv are the electron and hole rest masses respectively, is
incorporated in the derivation of the energy gap equation
The perturbation theory is also extended to include the spin-orbit interaction
leading to a different expression for the energy gap
Third, the density of states (DOS) for ZnSxSe1-x in a quantizing magnetic field has been
determined by the E-k relation. The energy gap calculated from CASTEP is considered
the unperturbed energy gap, Eg0. The actual energy Eg is related to Eg0 and results
obtained are in reasonable agreement with published results obtained from literature.
Energy gap with spin-orbit interaction is higher than the values calculated using energy
gap equation without spin.
The DOS
is shown to depend on the electron energy and the magnetic field. Fermi level is
modified by the magnetic field. |
| first_indexed | 2025-11-14T13:27:49Z |
| format | Thesis |
| id | um-3874 |
| institution | University Malaya |
| institution_category | Local University |
| last_indexed | 2025-11-14T13:27:49Z |
| publishDate | 2012 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | um-38742018-09-05T23:27:59Z Computational and theoretical studies on ZnS[x]Se[1-x] (0≤x≤1) / Ghassan H. Esa Al-Shabeeb Al-Shabeeb, Ghassan H. Esa QC Physics The aim of this work is to study a theory of the energy band gap of ZnSxSe1-x (0≤ x ≤1) materials, and to obtain the density of states (DOS) in a quantizing magnetic field. From k .p perturbation theory, momentum matrix elements and energy eigenvalue of the Zn-S-Se alloy are derived. An empirical relationship where (μ*)-1=(mc)-1+(mv)-1, and mc, mv are the electron and hole rest masses respectively, is incorporated in the derivation of the energy gap equation The perturbation theory is also extended to include the spin-orbit interaction leading to a different expression for the energy gap Third, the density of states (DOS) for ZnSxSe1-x in a quantizing magnetic field has been determined by the E-k relation. The energy gap calculated from CASTEP is considered the unperturbed energy gap, Eg0. The actual energy Eg is related to Eg0 and results obtained are in reasonable agreement with published results obtained from literature. Energy gap with spin-orbit interaction is higher than the values calculated using energy gap equation without spin. The DOS is shown to depend on the electron energy and the magnetic field. Fermi level is modified by the magnetic field. 2012 Thesis NonPeerReviewed application/pdf http://studentsrepo.um.edu.my/3874/1/1._Title_page%2C_abstract%2C_content.pdf application/pdf http://studentsrepo.um.edu.my/3874/2/CAHP_1%262_INTRO%2C_LIT_REVIEW.pdf application/pdf http://studentsrepo.um.edu.my/3874/3/CHAP_3_Results_for_ZnSxSe1%2Dx_(0_%E2%89%A4_x_%E2%89%A4_1)_from_CASTEP.pdf application/pdf http://studentsrepo.um.edu.my/3874/4/CHAP_4_Results_on_Energy_Gap_for_ZnSxSe1%2Dx_(0_%E2%89%A4_x_%E2%89%A4_1).pdf application/pdf http://studentsrepo.um.edu.my/3874/5/CHAP_5_Results_on_Energy_Gap_for_ZnSxSe1%2Dx.pdf application/pdf http://studentsrepo.um.edu.my/3874/6/CHAP_6_Results_on_the_Density_of_States_for_ZnSxSe1%2Dx.pdf application/pdf http://studentsrepo.um.edu.my/3874/7/CHAP_7%268_DISCUSSION_%26_RECOMMENDATIONS.pdf application/pdf http://studentsrepo.um.edu.my/3874/8/REFERENCES.pdf application/pdf http://studentsrepo.um.edu.my/3874/9/Appendices.pdf http://pendeta.um.edu.my/client/default/search/results?qu=Computational+and+theoretical+studies+on+ZnS%5Bx%5DSe%5B1-x%5D+%280%E2%89%A4x%E2%89%A41%29&te= Al-Shabeeb, Ghassan H. Esa (2012) Computational and theoretical studies on ZnS[x]Se[1-x] (0≤x≤1) / Ghassan H. Esa Al-Shabeeb. PhD thesis, University of Malaya. http://studentsrepo.um.edu.my/3874/ |
| spellingShingle | QC Physics Al-Shabeeb, Ghassan H. Esa Computational and theoretical studies on ZnS[x]Se[1-x] (0≤x≤1) / Ghassan H. Esa Al-Shabeeb |
| title | Computational and theoretical studies on ZnS[x]Se[1-x] (0≤x≤1) / Ghassan H. Esa Al-Shabeeb |
| title_full | Computational and theoretical studies on ZnS[x]Se[1-x] (0≤x≤1) / Ghassan H. Esa Al-Shabeeb |
| title_fullStr | Computational and theoretical studies on ZnS[x]Se[1-x] (0≤x≤1) / Ghassan H. Esa Al-Shabeeb |
| title_full_unstemmed | Computational and theoretical studies on ZnS[x]Se[1-x] (0≤x≤1) / Ghassan H. Esa Al-Shabeeb |
| title_short | Computational and theoretical studies on ZnS[x]Se[1-x] (0≤x≤1) / Ghassan H. Esa Al-Shabeeb |
| title_sort | computational and theoretical studies on zns[x]se[1-x] (0≤x≤1) / ghassan h. esa al-shabeeb |
| topic | QC Physics |
| url | http://pendeta.um.edu.my/client/default/search/results?qu=Computational+and+theoretical+studies+on+ZnS%5Bx%5DSe%5B1-x%5D+%280%E2%89%A4x%E2%89%A41%29&te= http://pendeta.um.edu.my/client/default/search/results?qu=Computational+and+theoretical+studies+on+ZnS%5Bx%5DSe%5B1-x%5D+%280%E2%89%A4x%E2%89%A41%29&te= http://studentsrepo.um.edu.my/3874/1/1._Title_page%2C_abstract%2C_content.pdf http://studentsrepo.um.edu.my/3874/2/CAHP_1%262_INTRO%2C_LIT_REVIEW.pdf http://studentsrepo.um.edu.my/3874/3/CHAP_3_Results_for_ZnSxSe1%2Dx_(0_%E2%89%A4_x_%E2%89%A4_1)_from_CASTEP.pdf http://studentsrepo.um.edu.my/3874/4/CHAP_4_Results_on_Energy_Gap_for_ZnSxSe1%2Dx_(0_%E2%89%A4_x_%E2%89%A4_1).pdf http://studentsrepo.um.edu.my/3874/5/CHAP_5_Results_on_Energy_Gap_for_ZnSxSe1%2Dx.pdf http://studentsrepo.um.edu.my/3874/6/CHAP_6_Results_on_the_Density_of_States_for_ZnSxSe1%2Dx.pdf http://studentsrepo.um.edu.my/3874/7/CHAP_7%268_DISCUSSION_%26_RECOMMENDATIONS.pdf http://studentsrepo.um.edu.my/3874/8/REFERENCES.pdf http://studentsrepo.um.edu.my/3874/9/Appendices.pdf |