Electric field tuning of spin splitting in a quantum dot coupled to a semimagnetic quantum dot

Yuli Lyanda-Geller, Birck Nanotechnology Center, Purdue University; United States Navy
T.L. Reinecke, United States Navy
G. Bacher, University of Duisburg Essen

Date of this Version



Y. Lyanda-Geller, T. L. Reinecke and G. Bacher. J. Appl. Phys. 111, 093705 (2012); http://dx.doi.org/10.1063/1.4705287


Copyright 2012 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. Appl. Phys. 111, 093705 (2012) and may be found at http://dx.doi.org/10.1063/1.4705287. The following article has been submitted to/accepted by Journal of Applied Physics. Copyright (2012) Y. Lyanda-Geller, T. L. Reinecke and G. Bacher. This article is distributed under a Creative Commons Attribution 3.0 Unported License.


We develop an approach for tuning the spin splitting and g-factor of a quantum dot by coupling it to semi-magnetic quantum dot and tuning the electric field. We show that spin splittings and g-factors of the states of a non-magnetic quantum dot coupled to semi-magnetic quantum dot can be enhanced orders of magnitude. Evaluations are made for coupled CdTe/CdMnTe quantum dots. These effects are caused by electric field control of repulsion of spin sublevels in the non-magnetic dot due to tunnel coupling of quantum dots. Electric field control of spin splittings in quantum dots is of potential interest in connection with spin qubit rotations for quantum computation. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4705287]


Nanoscience and Nanotechnology