Magnetotransport spectroscopy of spatially coincident coupled electron waveguides

被引：21

作者：

Fischer, SF ^{[1
]}

Apetrii, G

Kunze, U

Schuh, D

Abstreiter, G

机构：

[1] Ruhr Univ Bochum, D-44780 Bochum, Germany

[2] Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.71.195330

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetotransport spectroscopy is carried out on quantum point contacts fabricated from a 30-nm-wide square quantum well with two occupied two-dimensional subbands. In this system the spatial region of one-dimensional mode coupling is well defined and the two-dimensional reservoirs do not cause interferences. The magnetodispersions in transversal and longitudinal magnetic fields show crossings and anticrossings of the energy levels of the two one-dimensional subladders depending on the parity of the lateral modes of the wave functions. The influence of the quantum point contact geometry and persistent charging effects on coupling is demonstrated.

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页数：6

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