| 均匀横向磁场条件下抛物量子阱结构中的共振隧穿 |
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| 引用本文： | 宫箭,梁希侠,班士良.均匀横向磁场条件下抛物量子阱结构中的共振隧穿[J].中国物理 B,2005,14(1):201-207. |
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| 作者姓名： | 宫箭 梁希侠 班士良 |
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| 作者单位： | Department of Physics, College of Sciences and Technology, Inner Mongolia University, Hohhot,010021, China;Department of Physics, College of Sciences and Technology, Inner Mongolia University, Hohhot,010021, China;CCAST (Word Laboratory), Beijing,100080, China;Department of Physics, College of Sciences and Technology, Inner Mongolia University, Hohhot,010021, China;CCAST (Word Laboratory), Beijing,100080, China |
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| 基金项目： | Project supported partly by the National Natural Science Foundation of China (Grant No 10164003) and the Foundation for University Key Teachers by the Ministry of Education (Grant No GG-140-10126-1005) |
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| 摘 要： | 采用简单的数值计算方法研究了均匀横向磁场条件下通过抛物量子阱结构的共振隧穿。计算了几种GaAs-AlxGa1-xAs-GaAs抛物阱结构的透射系数。结果表明：磁场增加时，共振峰向高能区移动，新的共振峰出现；同时讨论了回旋中心在不同位置时，抛物阱结构的J-V 特性。我们发现回旋中心在抛物阱中心时更有助于解释实验，并且能够得到和实验一致的结果：磁场增加，电流峰值减少且向高偏压移动。
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| 关 键 词： | 共振隧穿，抛物量子阱，横向磁场 |
| 收稿时间： | 2004-05-28 |
Resonant tunnelling in parabolic quantum well structures under a uniform transverse magnetic field |
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| Gong Jian,Liang Xi-Xia and Ban Shi-Liang.Resonant tunnelling in parabolic quantum well structures under a uniform transverse magnetic field[J].Chinese Physics B,2005,14(1):201-207. |
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| Authors: | Gong Jian Liang Xi-Xia and Ban Shi-Liang |
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| Institution: | Department of Physics, College of Sciences and Technology, Inner Mongolia University, Hohhot,010021, China; Department of Physics, College of Sciences and Technology, Inner Mongolia University, Hohhot,010021, China;CCAST (Word Laboratory), Beijing,100080, China |
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| Abstract: | The resonant tunnelling through parabolic quantum well structures under a uniform transverse magnetic field is investigated by a simple numerical method. Numerical results of the transmission coefficient are obtained for several GaAs--AlxGa1-xAs parabolic well structures. It is found that the resonant peaks shift towards the higher energy region as the magnetic field increases, and some new resonant peaks emerge when the magnetic field becomes stronger. The J-V characteristics of a parabolic quantum well are discussed for the cyclotron centre located at different positions. It is also found that the cyclotron centre located at the parabolic well centre is helpful to explain the experiment, and the peak current densities decrease and shift to higher bias with the increase of
magnetic field. The influence of mixed crystal effect on the J-V characteristic under a uniform transverse magnetic field is also investigated. |
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| Keywords: | resonant tunnelling parabolic quantum well transverse magnetic field |
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