The role of Rashba spin-orbit interaction and external fields in the thermal properties of a doped quantum dot with Gaussian impurity

Thermodynamic quantities such as internal energy, heat capacity, and entropy are calculated for doped quantum dot by taking into account the Rashba spin-orbit coupling. It is demonstrated that thermal properties can be controlled by Rashba coupling, Gaussian impurity parameters, and applied fields so that enhancement of Rashba coupling strength and electric field reduces the internal energy. The changes in some parameters such as the magnetic field and strength of confinement potential strongly confine the electron in a quantum dot, and consequently entropy (internal energy) decreases (increases). The results showed that the presence of impurity in quantum dot reduced heat capacity. Also, type of impurity such as repulsive and attractive cases becomes important. Moreover, the thermal properties of asymmetric quantum dot have been investigated.