中国物理B ›› 2004, Vol. 13 ›› Issue (12): 2136-2140.doi: 10.1088/1009-1963/13/12/028

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Ground state of excitons in quantum-dot quantum-well nanoparticles: stochastic variational method

张恒, 史俊杰   

  1. State Key Laboratory for Mesoscopic Physics and School of Physics, Peking University, Beijing 100871, China
  • 收稿日期:2003-12-23 修回日期:2004-08-03 出版日期:2004-12-17 发布日期:2005-03-17
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 60276004 and 60390073).

Ground state of excitons in quantum-dot quantum-well nanoparticles: stochastic variational method

Zhang Heng (张恒), Shi Jun-Jie (史俊杰)   

  1. State Key Laboratory for Mesoscopic Physics and School of Physics, Peking University, Beijing 100871, China
  • Received:2003-12-23 Revised:2004-08-03 Online:2004-12-17 Published:2005-03-17
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 60276004 and 60390073).

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摘要： Within the framework of effective mass approximation, the ground state of excitons confined in spherical core-shell quantum-dot quantum-well (QDQW) nanoparticles is solved by using the stochastic variational method, in which the finite band offset and the heavy (light) hole exciton states are considered. The calculated 1s_e－1s_h transition energies for the chosen CdS/HgS/CdS QDQW samples are in good agreement with the experimental measurements. Moreover, some previous theoretical results are improved.

关键词: excitons, CdS/HgS/CdS quantum-dot quantum-well nanoparticles, stochastic variational method

Abstract: Within the framework of effective mass approximation, the ground state of excitons confined in spherical core-shell quantum-dot quantum-well (QDQW) nanoparticles is solved by using the stochastic variational method, in which the finite band offset and the heavy (light) hole exciton states are considered. The calculated 1se－1sh transition energies for the chosen CdS/HgS/CdS QDQW samples are in good agreement with the experimental measurements. Moreover, some previous theoretical results are improved.

Key words: excitons, CdS/HgS/CdS quantum-dot quantum-well nanoparticles, stochastic variational method

中图分类号:  (Collective excitations)

  • 73.22.Lp
73.21.Fg (Quantum wells) 73.21.La (Quantum dots)