Aharonov-Bohm oscillations in p-type GaAs quantum rings

被引：17

作者：

Grbic, Boris ^{[1
]}

Leturcq, Renaud ^{[1
]}

Ihn, Thomas ^{[1
]}

Ensslin, Klaus ^{[1
]}

Reuter, Dirk ^{[2
]}

Wieck, Andreas D. ^{[2
]}

机构：

[1] ETH, Inst Solid State Phys, CH-8093 Zurich, Switzerland

[2] Ruhr Univ Bochum, Angew Festkorperphys, D-44780 Bochum, Germany

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2008年 / 40卷 / 05期

关键词：

Aharonov-Bohm oscillations; spin-orbit interactions; spin interference; quantum ring;

D O I：

10.1016/j.physe.2007.08.129

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We have explored phase coherent transport of holes in two p-type GaAs quantum rings with orbital radii 420 and 160 nm fabricated with AFM oxidation lithography. Highly visible Aharonov-Bohm (AB) oscillations are measured in both rings, with an amplitude of the oscillations exceeding 10% of the total resistance in the case of the ring with a radius of 160nm. Beside the h/e oscillations, we resolve the contributions from higher harmonics of the AB oscillations. The observation of a local resistance minimum at B = 0T in both rings is a signature of the destructive interference of the holes' spins. We show that this minimum is related to the minimum in the h/2e oscillations. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：1273 / 1275

页数：3