Singlet-triplet transition in quantum dots confined by triangular and bowl-like potentials: the effect of electric fields
文献类型：期刊论文
| 作者 | Sun, LL ; Li, SS |
| 刊名 | chinese physics letters
 |
| 出版日期 | 2005 |
| 卷号 | 22期号:9页码:2371-2374 |
| 关键词 | ARTIFICIAL ATOMS |
| ISSN号 | 0256-307x |
| 通讯作者 | sun, ll, chinese acad sci, inst semicond, state key lab superlattices & microstruct, pob 912, beijing 100083, peoples r china. 电子邮箱地址: oak@red.semi.ac.cn |
| 中文摘要 | we theoretically investigate the energy spectra of two-electron two-dimensional (2e 2d) quantum dots (qds) confined by triangular potentials and bowl-like potentials in a magnetic field by exact diagonalization in the framework of effective mass theory. an in-plane electric field is,found to contribute to the singlet-triplet transition of the ground state of the 2e 2d qds confined by triangular or bowl-like potentials in a perpendicular magnetic field. the stronger the in-plane electric field, the smaller the magnetic field for the total spin of the ground states in the dot systems to change from s = 0 to s = 1. however, the influence of an in-plane electric field on the singlet-triplet transition of the ground state of two electrons in a triangular qd modulated by a perpendicular magnetic field is quite small because the triangular potential just deviates from the harmonic potential well slightly. we end that the strength of the perpendicular magnetic field needed for the spin singlet-triplet transition of the ground state of the qd confined by a bowl-like potential is reduced drastically by applying an in-plane electric field. |
| 学科主题 | 半导体物理 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2010-03-17 |
| 源URL | [http://ir.semi.ac.cn/handle/172111/8526]  |
| 专题 | 半导体研究所_中国科学院半导体研究所（2009年前） |
| 推荐引用方式 GB/T 7714 | Sun, LL,Li, SS. Singlet-triplet transition in quantum dots confined by triangular and bowl-like potentials: the effect of electric fields[J]. chinese physics letters,2005,22(9):2371-2374. |
| APA | Sun, LL,&Li, SS.(2005).Singlet-triplet transition in quantum dots confined by triangular and bowl-like potentials: the effect of electric fields.chinese physics letters,22(9),2371-2374. |
| MLA | Sun, LL,et al."Singlet-triplet transition in quantum dots confined by triangular and bowl-like potentials: the effect of electric fields".chinese physics letters 22.9(2005):2371-2374. |
入库方式： OAI收割
来源：半导体研究所
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