| 周期磁场调制下的二维电子结构 |
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| 引用本文： | 牟舜禹,张小伟,代,波.周期磁场调制下的二维电子结构[J].计算物理,2014,31(2):237-242. |
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| 作者姓名： | 牟舜禹 张小伟 代 波 |
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| 作者单位： | 四川省非金属复合与功能材料重点实验室 省部共建国家重点实验室培育基地 西南科技大学, 四川 绵阳 621010 |
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| 基金项目： | 国家自然科学基金(11074206);博士启动基金(09zx7118)资助项目 |
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| 摘 要： | 基于有限差分方法,研究周期梯度磁场调制下二维电子气的电子性质.结果表明:由于周期梯度磁场的存在,体系展现出丰富的电子能带结构.其子带的宽度随|ky|增大而不断变窄,|ky|越大势阱越深;由于在ky > 0和ky < 0两个区域的有效势能不一样,其能带结构在两个区域不一致且在ky > 0的区域中形成更多束缚态.通过改变磁条周期、磁条到2DEG的距离及磁化强度研究其对电子能带结构的影响.
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| 关 键 词： | 二维电子气 周期磁场 电子结构 有限差分 |
| 收稿时间： | 2013-05-30 |
| 修稿时间： | 2013-10-01 |
Two-dimensional Electronic Structure in a Periodic Magnetic Field |
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| MOU Shunyu,ZHANG Xiaowei,DAI Bo.Two-dimensional Electronic Structure in a Periodic Magnetic Field[J].Chinese Journal of Computational Physics,2014,31(2):237-242. |
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| Authors: | MOU Shunyu ZHANG Xiaowei DAI Bo |
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| Institution: | State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010, China |
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| Abstract: | With finite-differences approach,we investigate electronic properties of 2DEG in periodic magnetic field modulation. It shows that the system exhibits rich band structures with presence of magnetic field. Width of sub-bands becomes narrower as ky increases,because the greater ky is the deeper the potential well is. Due to different effective potential in two regions,ky > 0 and ky < 0,band structure in two areas are not consistent. More bound states are in the area of ky > 0. In addition,we study effect on energy band structure of period,distance of magnetic stripes and strength of magnetization. |
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| Keywords: | dimensional electrons gas periodic magnetic field electronic structure finite-differences method |
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