ANTİSİMETRİK AlxLGa1-xLAs/GaAs/AlxRGa1-xRAs KUANTUM KUYUSUNDA SICAKLIK VE HİDROSTATİK BASINÇ ETKİLERİ
Bu çalışmada sıcaklık ve hidrostatik basınç etkisi altında simetrik AlxGa1-xAs/GaAs/ AlxGa1-xAs ve antisimetrik AlxLGa1-xLAs/GaAs/ AlxRGa1-xRAs kuantum kuyularında engel yükseklik oranlarının etkileri, etkin kütle yaklaşımında varyasyonel yöntem kullanılarak çalışıldı. Taban durum yabancı atom enerjileri, yabancı atom enerjisisnin dönüm noktaları ve taban durum normalize edilmiş bağlanma enerjileri hesaplandı. Sıcaklık, hidrostatik basınç, farklı engel yükseklikleri ve yabancı atom konumunun, taban durum yabancı atom enerjisini ve yabancı atom enerjisinin dönüm noktalarını önemli ölçüde değiştirdiği gösterildi.
Anahtar Kelimeler:
Dönüm noktası, Sıcaklık, Hidrostatik basınç, Bağlanma enerjisi
THE TEMPERATURE AND HYDROSTATİC PRESSURE EFFECTS İN THE ASYMMETRİC AlxLGa1- xLAs/GaAs/AlxRGa1-xRAs QUANTUM WELL
In this work, we studied the effects of barrier height ratio VL/VR on symmetric AlxGa1-xAs/GaAs/AlxGa1-xAs and asymmetric AlxLGa1-xLAs/GaAs/AlxRGa1-xRAs quantum wells under the presence of hydrostatic pressure and temperature by using variational method with in the effective mass approximation. We calculated ground state impurity energies, impurity energy turning points and ground state normalized binding energies as functions of the impurity position. We observed that the ground state impurity energies and impurity energy turning points depends strongly on hydrostatic pressure, temperature, different barrier heights and impurity positions.
Keywords:
Turning point Temperature, hydrostatic pressure, Binding energies, Normalized binding energies,
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- 1. ELABSY A.M., Temperature dependence of shallow donor states in GaAs-AlxGa1-xAs compostional superlattice, Physica Scripta, no. 46, p. 473-475, 1992.
- 2. KLAR P.J., GRÜNİNG H, HEİMBRODT W., Pressure and Temperature Dependent Studies of GaNxAs1–x/GaAs Quantum Well Structures, Phys.Status solidi B, no. 223, p. 163, 2001.
- 3. ERDOGAN I., AKANKAN O., AKBAS H., Simultaneous effects of temperature, hydrostatic pressure and electric field on the self-polarization and electric field polarization in GaAs/Ga0.7Al0.3As spherical quantum dot with a donor impurity, Superlattices and Microstructures, no. 59, p. 13-20, 2013.
- 4. REZAEI G., KISH S.S., Effects of external electric and magnetic fields, hydrostatic pressure and temperature on the binding energy of a hydrogenic impurity confined in a two-dimensional quantum dot, Physica E: Low-dimensional Systems and Nanostructures, no. 45, p. 56-60, 2012.
- 5. NICULESCU E.C., ESEANU N., Hydrostatic pressure and electric field effects on the normalized binding energy in asymmetrical quantum wells, Eur. Phys. J. B, no. 75, p. 247-251, 2010.
- 6. AKBAS H, DANE C.,ERDOGAN I., Hydrogenic donor in asymmetric AlxLGa1-xLAs/GaAs/AlxRGa1-xRAs quantum wells, Physica E: Low-dimensional Systems and Nanostructures, no. 60, p. 196-199, 2014.
- 7. ZHANG C., WANG Z., LIU Y., GUO K., Binding energy of shallow donor impurity in asymmetric quantum wells, Physica E: Low-dimensional Systems and Nanostructures, no. 43, p. 372-374, 2010.
- 8. DANE C., AKBAS H., MİNEZ S., GULEROĞLU A., Simultaneous effects of electric and magnetic fields in a GaAs/AlAs spherical quantum dot with a hydrogenic impurity, Physica E: Low-dimensional Systems and Nanostructures, no. 42, p. 1901-1904, 2010.
- 9. DANE C., AKBAS H., MİNEZ S., GULEROĞLU A., Electric field effect in a GaAs/AlAs spherical quantum dot, Physica E: Low-dimensional Systems and Nanostructures, no. 41, p. 278-281, 2008.
- 10. DANE C., AKBAS H., GULEROGLU A., MİNEZ S., The effect of magnetic field in a GaAs/AlAs spherical quantum dot with a hydrogenic impurity, Physica E: Low-dimensional Systems and Nanostructures,, no. 41, p. 605-608, 2009.
- 11. JOHN PETER A., NAVANETHAKRISHNAN K., Effects of position-dependent effective mass and dielectric function of a hydrogenic donor in a quantum dot, Physica E: Low-dimensional Systems and Nanostructures, no. 40, p. 2747-2751, 2008.
- 12. YESILGUL U., SAKIROGLU S., KASAPOGLU E., SARI H., SOKMEN I., The effects of temperature and hydrostatic pressure on the photoionization cross-section and binding energy of impurities in quantum-well wires, Superlattices and Microstructures, no. 48, p. 106-113, 2010.
- 13. KARKI H.D., ELAGOZ S., BASER P., The high hydrostatic pressure effect on shallow donor binding energies in GaAs–(Ga, Al)As cylindrical quantum well wires at selected temperatures, Physica B Condensed Matter, no. 406(11), p. 2116-2120, 2011.
- ISSN: 2147-0308
- Yayın Aralığı: Yılda 2 Sayı
- Başlangıç: 2000
- Yayıncı: Trakya Üniversitesi