Thermodynamic Properties of a Quantum Ring Perturbed with Quantum Wells and Impurities

Authors M. Solaimani

Department of Physics, Faculty of Basic Sciences, Qom University of Technology, Qom, Iran

Issue Volume 10, Year 2018, Number 6
Dates Received 03 September 2018; revised manuscript received 28 November 2018; published online 18 December 2018
Citation M. Solaimani, J. Nano- Electron. Phys. 10 No 6, 06006 (2018)
PACS Number(s) 61.46. – w
Keywords Quantum rings, Mean energy, Specific heat, Entropy and tight binding model.

In this work, we study the thermodynamic properties of a quantum ring in the presence of an additional quantum well and impurity in its circumstance. Effects of the number of impurities, impurities strengths, quantum ring radiuses and potential well depth on the mean energy, specific heat and entropy of a quantum ring have been investigated. We have seen that, if the temperature or quantum ring radius increases the entropy of the system also increases. Adding few impurities just at low temperatures can change the specific heat. At low temperatures and for small radius quantum rings, adding a quantum well even with a very small height can create a sharp sensible peak in the specific heat diagram versus temperature.