Remarks on thermodynamic properties of a double ring-shaped quantum dot at low and high temperatures

• URL: http://arxiv.org/abs/2012.07633v1
• Date: Fri, 11 Dec 2020 11:33:16 GMT
• Title: Remarks on thermodynamic properties of a double ring-shaped quantum dot at low and high temperatures
• Authors: Andr\'es G. Jir\'on Vicente and Luis B. Castro and Angel E. Obispo and Luis E. Arroyo Meza
• Abstract summary: Khordad and collaborators have studied the thermodynamics properties of a GaAs double ring-shaped quantum dot under external magnetic and electric fields. We calculate the partition function with the correct energy spectrum and recalculate the specific heat and entropy as a function of low and high temperatures.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: In a recent paper published in this Journal, Khordad and collaborators [J Low Temp Phys (2018) 190:200] have studied the thermodynamics properties of a GaAs double ring-shaped quantum dot under external magnetic and electric fields. In that meritorious research the energy of system was obtained by solving the Schr\"{o}dinger equation. The radial equation was mapped into a confluent hypergeometric differential equation and the differential equation associated to $z$ coordinate was mapped into a biconfluent Heun differential equation. In this paper, it is pointed out a misleading treatment on the solution of the biconfluent Heun equation. It is shown that the energy $E_{z}$ can not be labeled with $n_{z}$ and this fact jeopardizes the results of this system. We calculate the partition function with the correct energy spectrum and recalculate the specific heat and entropy as a function of low and high temperatures.

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