National Changhua University of Education Institutional Repository : Item 987654321/14095
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题名: Ground State of Graphite Ribbons with Zigzag Edges
作者: Lee, Yu-Li;Lee, Yu-Wen
贡献者: 物理學系
日期: 2002
上传时间: 2012-09-10T06:07:45Z
出版者: The American Physical Society
摘要: We study the interaction effects on the ground state of nanographite ribbons with zigzag edges. Within the mean-field approximation, we find that there are two possible phases: the singlet superconducting (SS) phase and the excitonic insulator (EI) phase. The two phases are separated by a first-order transition point. After taking into account the low-lying fluctuations around the mean-field solutions, the SS phase becomes a spin liquid phase with one gapless charge mode. On the other hand, all excitations in the EI phase, especially the spin excitations, are gapped.
關聯: Phys. Rev. B, 66(24): 245402
显示于类别:[物理學系] 期刊論文

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