Coupled magneto-thermo-electromechanical effects and electronic properties of quantum dots

For the first time, we systemically analyze the influence of magneto-thermo-electromechanical effects on the band structure calculations by using the fully coupled model. We focus on three different types of quantum dots (QDs): (a) ferroelectric, (b) piezomagnetic, and (c) magnetoelectric, with and without wetting layers (WLs). We demonstrate that the influence of such coupled effects in the general fully coupled framework for studying properties of QDs can be significant and we quantify these effects in each case. For example, in magnetic GaN/BaTiO3 QDs, we found that the influence of electromechanical effects on the band structure calculations and the spin splitting energy are practically independent of temperature. However, in piezoelectric AlN/GaN QDs, the influence of temperature on the electromechanical effects, electronic properties and spin splitting energy is significant. In particular, in piezoelectric AlN/GaN QDs, the intra-subband energy (i.e., the energy difference between ground and first excited states) decreases with the increase in temperature. Copyright © 2013 American Scientific Publishers. All rights reserved