Conditions for dynamic localization in generalized ac electric fields

被引：86

作者：

Dignam, MM ^{[1
]}

de Sterke, CM

机构：

[1] Queens Univ, Dept Phys, Kingston, ON K7L 3N6, Canada

[2] Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.88.046806

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We examine the conditions for dynamic localization of electrons in a periodic potential due to an applied ac electric field. Using a general one-band model, we establish the surprising result that only electric fields that are discontinuous at all changes of sign can lead to exact dynamic localization. We also develop a general procedure for constructing ac fields that yield dynamic localization and derive an "area condition" for such fields. We confirm this result numerically in a multiband simulation.

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页码：4 / 468064

页数：4

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