Magnetic-field-induced miniband conduction in semiconductor superlattices

被引：12

作者：

Fowler, Daivid ^{[1
]}

Hardwick, David P. A. ^{[1
]}

Patane, Amalia ^{[1
]}

Greenaway, Mark T. ^{[1
]}

Balanov, Alexander G. ^{[1
]}

Fromhold, Timothy M.

Eaves, Laurence ^{[1
]}

Henini, Mohamed ^{[1
]}

Kozlova, Nadezda ^{[2
,3
]}

Freudenberger, Jens ^{[2
,3
]}

Mori, Nobuya

机构：

[1] Univ Nottingham, Nottingham NG7 2RD, England

[2] Inst Met Mat, IFW Dresden, D-01171 Dresden, Germany

[3] Dresden High Magnet Field Lab, D-01314 Dresden, Germany

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 24期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevB.76.245303

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the dynamics of electrons in a semiconductor superlattice under the action of large applied electric F and magnetic fields B (up to 47 T). We show that the coupling of the Bloch and cyclotron oscillations in the tilted B geometry generates a magnetic-field-induced miniband structure and an extended electron motion across many periods of the superlattice. The spatially extended character of the electronic states is analogous to the delocalization of the electron orbit in a semiclassical description of the electron motion and explains our observation of a strong resonant enhancement of the current flow through the superlattice.

引用

页数：6

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