Quantum confinement of carriers in the type-Ⅰ quantum wells structure

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

Quantum confinement is recognized to be an inherent property in low-dimensional structures.Traditionally,it is believed that the carriers trapped within the well cannot escape due to the discrete energy levels.However,our previous research has revealed efficient carrier escape in low-dimensional structures,contradicting this conventional understanding.In this study,we review the energy band structure of quantum wells along the growth direction considering it as a super-position of the bulk material dispersion and quantization energy dispersion resulting from the quantum confinement across the whole Brillouin zone.By accounting for all wave vectors,we obtain a certain distribution of carrier energy at each quantized energy level,giving rise to the energy subbands.These results enable carriers to escape from the well under the influence of an electric field.Additionally,we have compiled a comprehensive summary of various energy band scenarios in quantum well structures relevant to carrier transport.Such a new interpretation holds significant value in deepening our comprehension of low-dimensional energy bands,discovering new physical phenomena,and designing novel devices with superior performance.

Key words

energy band/quantum confinement/type-Ⅰ quantum wells/low-dimensional structures

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基金项目

National Natural Science Foundation of China(61991441)

National Natural Science Foundation of China(62004218)

Strategic Priority Research Program of Chinese Academy of Sciences(XDB01000000)

Youth Innovation Promotion Association of 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

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