Reanalysis of energy band structure in the type-Ⅱ quantum wells

李欣欣 ¹邓震 ²江洋 ¹杜春花 ²贾海强 ³王文新 ³陈弘⁴

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作者信息

1. Key Laboratory for Renewable Energy,Beijing Key Laboratory for New Energy Materials and Devices,Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;Center of Materials and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China
2. Key Laboratory for Renewable Energy,Beijing Key Laboratory for New Energy Materials and Devices,Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;Center of Materials and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;The Yangtze River Delta Physics Research Center,Liyang 213000,China
3. Key Laboratory for Renewable Energy,Beijing Key Laboratory for New Energy Materials and Devices,Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;Center of Materials and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;Songshan Lake Materials Laboratory,Dongguan 523808,China
4. Key Laboratory for Renewable Energy,Beijing Key Laboratory for New Energy Materials and Devices,Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;Center of Materials and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;The Yangtze River Delta Physics Research Center,Liyang 213000,China;Songshan Lake Materials Laboratory,Dongguan 523808,China
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Abstract

Band structure analysis holds significant importance for understanding the optoelectronic characteristics of semicon-ductor structures and exploring their potential applications in practice.For quantum well structures,the energy of carriers in the well splits into discrete energy levels due to the confinement of barriers in the growth direction.However,the discrete energy levels obtained at a fixed wave vector cannot accurately reflect the actual energy band structure.In this work,the band structure of the type-Ⅱ quantum wells is reanalyzed.When the wave vectors of the entire Brillouin region(corre-sponding to the growth direction)are taken into account,the quantized energy levels of the carriers in the well are replaced by subbands with certain energy distributions.This new understanding of the energy bands of low-dimensional structures not only helps us to have a deeper cognition of the structure,but also may overturn many viewpoints in traditional band theories and serve as supplementary to the band theory of low-dimensional systems.

Key words

energy band structure/type-Ⅱ quantum wells/low-dimensional semiconductors

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基金项目

国家自然科学基金(61991441)

国家自然科学基金(62004218)

中国科学院战略规划重点项目(XDB01000000)

Youth Innovation Promotion Association Chinese Academy of Sciences(2021005)

出版年

2024

中国物理B(英文版)

中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI

影响因子：0.995

ISSN：1674-1056

参考文献量35

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