Quasi-energy spectrum of multiband superlattices in dc-ac electric fields
文献类型：期刊论文
| 作者 | Zhao, XG; Niu, Q |
| 刊名 | PHYSICS LETTERS A
 |
| 出版日期 | 1996 |
| 卷号 | 222期号:6页码:435-439 |
| 关键词 | Tightly Bound Electrons Wannier-stark Ladders Dynamic Localization Charged-particle Time States Motion Band |
| ISSN号 | 0375-9601 |
| 英文摘要 | The dynamics of Bloch electrons moving in a two-band superlattice driven by a dc-ac electric field is investigated. We show rigorously that (i) when the matching ratio between the Bloch frequency and the ac frequency is an integer, the spectrum is that of two quasi-energy bands; (ii) when the matching ratio is a rational, the spectrum is two interspaced fractional Wannier-Stark ladders; and (iii) each of these fractional ladders has an energy dispersion due to the interband coupling. We illustrate our findings by explicit calculations of the spectrum in the high-frequency case, and show how the energy dispersion is tuned by the ac field strength and how band collapse occurs. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:A1996VU07600012 |
| 公开日期 | 2012-08-29 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/12559]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 推荐引用方式 GB/T 7714 | Zhao, XG,Niu, Q. Quasi-energy spectrum of multiband superlattices in dc-ac electric fields[J]. PHYSICS LETTERS A,1996,222(6):435-439. |
| APA | Zhao, XG,&Niu, Q.(1996).Quasi-energy spectrum of multiband superlattices in dc-ac electric fields.PHYSICS LETTERS A,222(6),435-439. |
| MLA | Zhao, XG,et al."Quasi-energy spectrum of multiband superlattices in dc-ac electric fields".PHYSICS LETTERS A 222.6(1996):435-439. |
入库方式： OAI收割
来源：理论物理研究所
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