Programme

P.61 -- Poster, VCTP-45

Date: Tuesday, 13 October 2020

Time: 08:30 - 10:00

On the Quadron State in Parabolic Quantum Dots

Nguyen Hong Quang (1) and Tran Anh Dung (2)

(1) Institute of Physics, Vietnam Academy of Science and Technology; (2) Institute for Scientific Information, Vietnam Academy of Science and Technology

In this work we consider a quadron state – a state of four particles – two electrons and two holes in quantum dots with parabolic potentials of confinement. By using the Hatree-Fock method, we obtain the binding energy of the quadron in the dependence of the system parameters, such as the mass ratios between the electron and the hole, the ratio between the electron and hole confinement strengths in the quantum dots. The effect of the magnetic field has been also investigated on the binding energy of the quadron. We have established the relationship between the binding energy of the quadron and the biexciton. It is interesting to note that in the ground state for the certain ranges of the electron-to-hole mass and confinement ratios, while the biexciton as a state of two excitons is unbound, the quadron state as a state of two electrons and two holes as a whole is bound.

Presenter: Nguyen Hong Quang

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