Piezomagnetic Quantum Dots

被引：41
作者：
Abolfath, Ramin M. [1 ,2 ]
Petukhov, A. G. [3 ]
Zutic, Igor [1 ]
机构：
[1] SUNY Buffalo, Dept Phys, Buffalo, NY 14260 USA
[2] Univ Texas SW Med Ctr Dallas, Dept Radiat Oncol, Dallas, TX 75390 USA
[3] S Dakota Sch Mines & Technol, Dept Phys, Radip City, SD 57701 USA
来源：
PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 20期
关键词：
D O I：
10.1103/PhysRevLett.101.207202
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study the influence of deformations on magnetic ordering in quantum dots doped with magnetic impurities. The reduction of symmetry and the associated deformation from circular to elliptical quantum confinement lead to the formation of piezomagnetic quantum dots. The strength of elliptical deformation can be controlled by the gate voltage to change the magnitude of magnetization, at a fixed number of carriers and in the absence of an applied magnetic field. We reveal a reentrant magnetic ordering with the increase of elliptical deformation and suggest that the piezomagnetic quantum dots can be used as nanoscale magnetic switches.
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页数：4
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