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arXiv 0909.4576cond-mat.mes-hall
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磁场作用下的人工分子量子环

Artificial molecular quantum rings under magnetic field influence

L. K. Castelano, G. -Q. Hai, B. Partoens, F. M. Peeters

摘要:

利用自旋-密度泛函理论,系统地研究了在外加磁场作用下,两个垂直耦合量子环中少数电子的基态。电子-电子相互作用和环间隧穿效应共同影响着电子结构和持续电流。对于小的外磁场,我们恢复了零磁场的分子量子环基态组态。增加磁场,许多角动量,自旋和同位旋转变预计发生在基态。我们表明,这些转变遵循一定的规则,这是由奇偶性的电子数,单粒子图片,洪德规则和多体效应。

英文摘要:

The ground states of few electrons confined in two vertically coupled quantum rings in the presence of an external magnetic field are studied systematically within the current spin-density functional theory. Electron-electron interactions combined with inter-ring tunneling affects the electronic structure and the persistent current. For small values of the external magnetic field, we recover the zero magnetic field molecular quantum ring ground state configurations. Increasing the magnetic field many angular momentum, spin, and iso-spin transitions are predicted to occur in the ground state. We show that these transitions follow certain rules, which are governed by the parity of the number of electrons, the single particle picture, the Hund's rules and many-body effects.

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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