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

共 11 条

[1] SIGNIFICANCE OF ELECTROMAGNETIC POTENTIALS IN THE QUANTUM THEORY [J].

AHARONOV, Y ;

BOHM, D .

PHYSICAL REVIEW, 1959, 115 (03) :485-491

[2] SPIN-ORBIT BERRY PHASE IN CONDUCTING RINGS [J].

ARONOV, AG ;

LYANDAGELLER, YB .

PHYSICAL REVIEW LETTERS, 1993, 70 (03) :343-346

[3]

BERGSTEN T, PHYS REV LETT, V97, P8302

[4] Conductance fluctuations in diffusive rings: Berry phase effects and criteria for adiabaticity [J].

Engel, HA ;

Loss, D .

PHYSICAL REVIEW B, 2000, 62 (15) :10238-10254

[5]

GRBIC B, 2007, THESIS ETH ZURICH, P48302

[6]

GRBIC B, IN PRESS PHYS REV LE, P48302

[7] Strong Aharonov-Bohm oscillations in GaAs two-dimensional holes [J].

Habib, B. ;

Tutuc, E. ;

Shayegan, M. .

APPLIED PHYSICS LETTERS, 2007, 90 (15)

[8] Direct observation of the Aharonov-Casher phase - art. no. 076804 [J].

König, M ;

Tschetschetkin, A ;

Hankiewicz, EM ;

Sinova, J ;

Hock, V ;

Daumer, V ;

Schäfer, M ;

Becker, CR ;

Buhmann, H ;

Molenkamp, LW .

PHYSICAL REVIEW LETTERS, 2006, 96 (07)

[9] Ensemble-average spectrum of Aharonov-Bohm conductance oscillations: Evidence for spin-orbit-induced Berry's phase [J].

Morpurgo, AF ;

Heida, JP ;

Klapwijk, TM ;

van Wees, BJ ;

Borghs, G .

PHYSICAL REVIEW LETTERS, 1998, 80 (05) :1050-1053

[10] Quantum beating in ring conductance: Observation of spin chiral states and Berry's phase [J].

Yang, MJ ;

Yang, CH ;

Lyanda-Geller, YB .

EUROPHYSICS LETTERS, 2004, 66 (06) :826-832

← 1 2 →