THE EFFECTS OF PRESSURE AND TEMPERATURE ON THE MAGNETIZATION OF A PARABOLIC QUANTUM DOT IN A MAGNETIC FIELD

Abstract

In this work , we present a theoretical study of the magnetization of two-electron GaAs parabolic quantum dot (QD) under the combined effects of external pressure, temperature and magnetic field. First, we obtain the eigenenergies by solving the two electron quantum dot Hamiltonian using the exact diagonalization method. The obtained results show that the energy levels of the quantum dot depend strongly on the pressure and temperature. Next, we investigate the dependence of magnetization of a quantum dot as a function of external pressure, temperature, confining frequency and magnetic field. The singlet-triplet transitions in the ground state of the quantum dot spectra and the corresponding jumps in the magnetization curves have been shown .The comparison shows that our results are in very good agreement with the reported works. PACS: 73.21.La, 65.80.-g Keywords: Pressure; temperature; magnetization; quantum dot; magnetic field; exact diagonalization.