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The role of Rashba spin-orbit interaction and external fields in the thermal properties of a doped quantum dot with Gaussian impurity
Physica B: Condensed Matter ( IF 2.8 ) Pub Date : 2020-05-27 , DOI: 10.1016/j.physb.2020.412259
P. Hosseinpour

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.



中文翻译:

Rashba自旋轨道相互作用和外部场在具有高斯杂质的掺杂量子点的热性质中的作用

通过考虑Rashba自旋轨道耦合来计算掺杂量子点的热力学量,例如内部能量,热容量和熵。结果表明,可以通过Rashba耦合,高斯杂质参数和施加场来控制热性能,从而增强Rashba耦合强度和电场可以减少内部能量。诸如磁场和约束电位强度之类的某些参数的变化将电子强烈地约束在量子点中,因此熵(内部能量)减小(增大)。结果表明,量子点中杂质的存在降低了热容量。另外,诸如排斥和吸引情况之类的杂质的类型也变得重要。此外,还研究了非对称量子点的热性能。

更新日期:2020-05-27
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