Optically-patterned nuclear doughnuts in GaAs/MnAs heterostructures
介观与纳米尺度物理
2009-11-10 v1 材料科学
摘要
We demonstrate a scheme for optically patterning nuclear spin polarization in semiconductor/ferromagnet heterostructures. A scanning time-resolved Kerr rotation microscope is used to image the nuclear spin polarization that results when GaAs/MnAs epilayers are illuminated with a focused laser having a Gaussian profile. Rather than tracking the intensity profile of the laser spot, these images reveal that the nuclear polarization forms an annular lateral structure having circular symmetry with a dip rather than a peak at its center.
引用
@article{arxiv.cond-mat/0404244,
title = {Optically-patterned nuclear doughnuts in GaAs/MnAs heterostructures},
author = {J. Stephens and J. Berezovsky and R. K. Kawakami and A. C. Gossard and D. D. Awschalom},
journal= {arXiv preprint arXiv:cond-mat/0404244},
year = {2009}
}
备注
11 pages, 3 figures