Magnetic Susceptibility of Coupled Double GaAs Quantum Dot in Magnetic Fields
M.K. Elsaid and E. Hijaz
Physics Department, Faculty of Science, An-Najah National University, Nablus, West Bank, Palestine
Received: August 2, 2016; In final form: March 22, 2017
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We calculate the magnetic susceptibility of two interacting electrons confined in a coupled double quantum dot presented in a magnetic field by solving the relative Hamiltonian using the combined variational and exact diagonalization methods. We have investigated the dependence of the magnetic susceptibility on temperature, magnetic field strength, confining frequency, and barrier height. The singlet-triplet transitions in the ground state of the quantum dot spectra and the corresponding jumps in the magnetic susceptibility curves have been shown. The comparisons show that our results are in very good agreement with reported works.

DOI: 10.12693/APhysPolA.131.1491
PACS/topics: magnetic susceptibility, variational method, exact diagonalization, double quantum dots