Magnetotransport in Two-Dimensional Electron Gas in Helical Nanomembranes

被引：21

作者：

Vorobyova, Julia S. ^{[1
]}

Vorob'ev, Alexander B. ^{[1
]}

Prinz, Victor Y. ^{[1
]}

Toropov, Alexander I. ^{[1
]}

Maude, Duncan K. ^{[2
]}

机构：

[1] Russian Acad Sci, Siberian Branch, Rzhanov Inst Semicond Phys, Novosibirsk 630090, Russia

[2] CNRS UJF INSA UPS, Lab Natl Champs Magnet Intenses, F-38042 Grenoble, France

来源：

NANO LETTERS | 2015年 / 15卷 / 03期

基金：

俄罗斯基础研究基金会;

关键词：

helical nanomembranes; two-dimensional electron gas on cylindrical surface; electron transport; edge channels; fractional quantum Hall effect; magnetic field gradient; QUANTUM-WELLS; MAGNETIC-FIELD; SUPERLATTICE;

D O I：

10.1021/nl504305s

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Heterostructures containing high-mobility two-dimensional electron gas were rolled into freestanding helically shaped contacted Hall bars. Magnetotransport measurements in these structures at high magnetic fields revealed minima in the longitudinal magnetoresistance corresponding to integer and fractional filling factors. A strong asymmetry of the longitudinal magnetoresistance with respect to the external magnetic field direction was observed. For this new type of structures, an edge state picture was considered, and calculations based on the Landauer-Buttiker formalism are performed.

引用

页码：1673 / 1678

页数：6

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