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NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2021, 12 (1), P. 113–117

Analysis of the energy spectrum of indium antimonide quantum dots with temperature changes

V. F. Kabanov – Saratov State University, Department of Nanoand Biomedical Technologies, Astrakhanskaya, 83, Saratov, 410012, Russia
A. I. Mikhailov – Saratov State University, Department of Nanoand Biomedical Technologies, Astrakhanskaya, 83, Saratov, 410012, Russia
M.V. Gavrikov – Saratov State University, Department of Nanoand Biomedical Technologies, Astrakhanskaya, 83, Saratov, 410012, Russia; maks.gavrikov.96@gmail.com

In this paper we have analyzed the broadening of the levels of the energy spectrum of indium antimonide quantum dots with a change of sample temperature. The position of the levels was determined by processing normalized differential tunneling current-voltage characteristics using the “cubic” model of a quantum dot. Comparison of the calculated values of spectrum broadening with experimental results showed qualitative and quantitative agreement between the results. It is concluded that with a decrease in the quantum dot size and, accordingly, an increase in the energy gap εc1 – εc1 the broadening in percentage will decrease, which should lead to an increase in the temperature stability of the electrophysical parameters.

Keywords: quantum dots, indium antimonide, differential tunnel current-voltage characteristics, energy spectrum.

DOI 10.17586/2220-8054-2021-12-1-113-117

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