Spatial imaging of magnetically patterned nuclear spins in GaAs

被引：26

作者：

Stephens, J ^{[1
]}

Kawakami, RK ^{[1
]}

Berezovsky, J ^{[1
]}

Hanson, M ^{[1
]}

Shepherd, DP ^{[1
]}

Gossard, AC ^{[1
]}

Awschalom, DD ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Ctr Spintron & Quantum Computat, Santa Barbara, CA 93106 USA

来源：

PHYSICAL REVIEW B | 2003年 / 68卷 / 04期

关键词：

D O I：

10.1103/PhysRevB.68.041307

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We exploit ferromagnetic imprinting to create complex laterally defined regions of nuclear spin polarization in lithographically patterned MnAs/GaAs epilayers grown by molecular beam epitaxy. A time-resolved Kerr rotation microscope with similar to1 mum spatial resolution uses electron spin precession to directly image the GaAs nuclear polarization. These measurements indicate that the polarization varies from a maximum under magnetic mesas to zero several microns from the mesa perimeter, resulting in large (similar to 10(4) T/m) effective field gradients. The results reveal a flexible scheme for lateral engineering of spin-dependent energy landscapes in the solid state.

引用

页数：4

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