Magnetotransport spectroscopy of spatially coincident coupled electron waveguides

S. F. Fischer; G. Apetrii; U. Kunze; D. Schuh; G. Abstreiter

doi:10.1103/PhysRevB.71.195330

Magnetotransport spectroscopy of spatially coincident coupled electron waveguides

S. F. Fischer, G. Apetrii, U. Kunze, D. Schuh, G. Abstreiter

Natural Sciences

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

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.

Original language	English
Article number	195330
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	71
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevB.71.195330
State	Published - 2005

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AU - Schuh, D.

AU - Abstreiter, G.

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AB - 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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Magnetotransport spectroscopy of spatially coincident coupled electron waveguides

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