Report
Singlet-triplet transitions in highly correlated nanowire quantum dots
| العنوان: | Singlet-triplet transitions in highly correlated nanowire quantum dots |
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| المؤلفون: | Chen, Y. T., Chao, C. C., Huang, S. Y., Tang, C. S., Cheng, S. J. |
| سنة النشر: | 2009 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: | We consider a quantum dot embedded in a three-dimensional nanowire with tunable aspect ratio a. A configuration interaction theory is developed to calculate the energy spectra of the finite 1D quantum dot systems charged with two electrons in the presence of magnetic fields B along the wire axis. Fruitful singlet-triplet transition behaviors are revealed and explained in terms of the competing exchange interaction, correlation interaction, and spin Zeeman energy. In the high aspect ratio regime, the singlet-triplet transitions are shown designable by tuning the parameters a and B. The transitions also manifest the highly correlated nature of long nanowire quantum dots. Comment: 4 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1016/j.physe.2009.11.084 |
| URL الوصول: | http://arxiv.org/abs/0912.1898 |
| رقم الانضمام: | edsarx.0912.1898 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1016/j.physe.2009.11.084 |
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