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ANTİSİMETRİK AlxLGa1-xLAs/GaAs/AlxRGa1-xRAs KUANTUM KUYUSUNDA SICAKLIK VE HİDROSTATİK BASINÇ ETKİLERİ

Yıl 2017, Cilt 18, Sayı 2, 137 - 143, 15.12.2017

Öz


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.


Kaynakça

  • 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.

THE TEMPERATURE AND HYDROSTATİC PRESSURE EFFECTS İN THE ASYMMETRİC AlxLGa1- xLAs/GaAs/AlxRGa1-xRAs QUANTUM WELL

Yıl 2017, Cilt 18, Sayı 2, 137 - 143, 15.12.2017

Öz

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.

Kaynakça

  • 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.

Ayrıntılar

Birincil Dil Türkçe
Konular Mühendislik
Bölüm Araştırma Makaleleri
Yazarlar

Serpil SUCU>
TRAKYA ÜNİVERSİTESİ, FEN FAKÜLTESİ, FİZİK BÖLÜMÜ
Türkiye


Sema MİNEZ>
TRAKYA ÜNİVERSİTESİ, FEN FAKÜLTESİ, FİZİK BÖLÜMÜ
Türkiye


Hasan AKBAŞ Bu kişi benim

Türkiye

Yayımlanma Tarihi 15 Aralık 2017
Yayınlandığı Sayı Yıl 2017, Cilt 18, Sayı 2

Kaynak Göster

IEEE S. Sucu , S. Minez ve H. Akbaş , "ANTİSİMETRİK AlxLGa1-xLAs/GaAs/AlxRGa1-xRAs KUANTUM KUYUSUNDA SICAKLIK VE HİDROSTATİK BASINÇ ETKİLERİ", Trakya Üniversitesi Mühendislik Bilimleri Dergisi, c. 18, sayı. 2, ss. 137-143, Ara. 2017