The effect of magnetic field in a GaAs/AlAs spherical quantum dot with a hydrogenic impurity

Antisimetrik AlxLGa1-xLAs/GaAs/ AlxRGa1-xRAs Kuantum Kuyusunda Hidrostatik Basıncın Etkisi

“…Ayrıca basıncın arttırılmasıyla taban durum yabancı atom enerjisinin pozitif değerlerden negatif değerlere geçtiği nokta olan dönüm noktalarının (DN) daha küçük kuyu genişliklerinde olduğu göz-lenmektedir. (b) de E b taban durum bağlanma enerjisi kuyu genişliği arttıkça azalmakta, hidrostatik basınç arttıkça artmaktadır [14][15] [16] Şekil2'de hidrostatik basıncın farklı sabit değerleri için simetrik ve antisimetrik kuantum kuyusunda taban durum yabancı atom enerjisinin dönüm noktalarının yabancı atomun konumunun bir fonksiyonuna bağlı olarak değişim grafiği gösterilmektedir. Burada dönüm noktası taban durum yabancı atom enerjisinin pozitif değerlerden negatif değer-lere geçtiği kuantum kuyu genişliğidir.…”

Spin-Orbit Interaction in a Spherical Quantum Dot

“…The conventional form of the trial wave function has been used in most of the earlier works (Montenegro and Merchancano [33], Peter [34], Dane et al [35,36], Akbas et al [37] and Mikhail and Ismail [38,39]). In Mikhail and El Sayed [32] a new form of the trial wavefunction has been introduced for the ground state (1s) for central and o-central impurities.…”

Effect of magnetic field on the impurity binding energy of the excited states in spherical quantum dot

“…Numerous theoretical works were published on the bound states of a hydrogenic impurity in spherical quantum dots. The location and strong spatial confinement of the impurity in these quantum dots reflect themselves in the energy levels and in the impurity binding energy [1][2][3][4][5][6][7][8][9][10].…”

“…Akbas et al [10] studied the problem of an electron bound to an impurity, located at the centre of a spherical quantum dot with infinite potential barriers in a uniform magnetic field. They used a variational method in which the trial wave function contained a Gaussian function.…”

“…They used a variational method in which the trial wave function contained a Gaussian function. When most of the previous investigations were restricted to the evaluation of the binding energies associated with the lowest 'subband' of the dot [7][8][9][10][11][12][13][14][15], the impurity binding energy of the excited states in the spherical quantum dot was calculated by Daries Bella et al [15]. Whereas the total potential of an electron inside the dot deviates from Coulombic nature, the accidental degeneracy associated with the n = 2 states splits up resulting in 2s and 2p states with different energies.…”