首页|Quantum confinement of carriers in the type-Ⅰ quantum wells structure
Quantum confinement of carriers in the type-Ⅰ quantum wells structure
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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.
energy bandquantum confinementtype-Ⅰ quantum wellslow-dimensional structures
李欣欣、邓震、江洋、杜春花、贾海强、王文新、陈弘
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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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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaStrategic Priority Research Program of Chinese Academy of SciencesYouth Innovation Promotion Association of Chinese Academy of Sciences
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