中文

人工分子化学键的磁场操控

介观与纳米尺度物理 2007-05-23 v1 强关联电子 核理论 化学物理

摘要

研究了轨道磁性对二维横向人工分子化学键的影响,具体分析为二维双量子点(人工分子氢)的情况。发现垂直磁场可减小 individual 量子点之间的耦合(隧穿),当磁场值足够大时,导致人工分子完全解离。所用方法基于Lowdin在量子化学中投影算子工作,采用自旋和空间不可约Hartree-Fock方法,随后通过投影技术恢复自旋和空间对称性(当这些对称性被破坏时)。该方法能够完整描述二维双量子点中从强耦合 regime(表现为局域分子轨道)到弱耦合和解离 regime(对应于广义价值键组合的原子轨道局域化于 individual 量子点)的全部耦合范围。

关键词

引用

@article{arxiv.cond-mat/0109167,
  title  = {Magnetic-field Manipulation of Chemical Bonding in Artificial Molecules},
  author = {Constantine Yannouleas and Uzi Landman},
  journal= {arXiv preprint arXiv:cond-mat/0109167},
  year   = {2007}
}

备注

20 pages. Latex with 4 GIF figures. Submitted to the Lowdin Memorial issue, to be published by the International Journal of Quantum Chemistry. A version of the manuscript with high quality figures incorporated in the text is available at http://calcite.physics.gatech.edu/~costas/qds_lowdin.html For related papers, see http://www.prism.gatech.edu/~ph274cy