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arXiv 1111.5439cond-mat.mes-hall
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InAs/InP量子点中电子、空穴和激子的g因子和抗磁系数

g-Factors and diamagnetic coefficients of electrons, holes and excitons in InAs/InP quantum dots

J. van Bree, A. Yu. Silov, P. M. Koenraad, M. E. Flatté, C. E. Pryor

摘要:

利用量子函数理论计算了圆柱形InAs/InP量子点在平行于量子点对称轴的磁场作用下的电子、空穴、激子g因子和抗磁系数.一个明确的连接之间建立的电子g-因子和振幅的那些价态包络函数,具有非零轨道动量与包络函数。激子的抗磁性系数对量子点高度的依赖关系被发现与有效质量的能量依赖关系。计算的激子g因子和抗磁系数,从与激子的电子和空穴成分相关的值构建,匹配实验数据以及,但是,包括电子和空穴状态之间的库仑相互作用提高了协议。远带贡献的价带电子结构,包括微扰,减少理论和实验之间的协议。

英文摘要:

The electron, hole, and exciton g-factors and diamagnetic coefficients have been calculated using envelope-function theory for cylindrical InAs/InP quantum dots in the presence of a magnetic field parallel to the dot symmetry axis. A clear connection is established between the electron g-factor and the amplitude of the those valence-state envelope functions which possess non-zero orbital momentum associated with the envelope function. The dependence of the exciton diamagnetic coefficients on the quantum dot height is found to correlate with the energy dependence of the effective mass. Calculated exciton g-factor and diamagnetic coefficients, constructed from the values associated with the electron and hole constituents of the exciton, match experimental data well, however including the Coulomb interaction between the electron and hole states improves the agreement. Remote-band contributions to the valence-band electronic structure, included perturbatively, reduce the agreement between theory and experiment.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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