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题名: Correlation effects for semiconducting single-wall carbon nanotubes: A density matrix renormalization group study
作者: Ye F;  Wang BS;  Lou JZ;  Su ZB
发表日期: 2005
摘要: In this paper we report the applicability of the density matrix renormalization group (DMRG) approach to the cylindrical single wall carbon nanotube (SWCN) for the purpose of its correlation effect. By applying the DMRG approach to the t+U+V model, with t and V being the hopping and Coulomb energies between the nearest neighboring sites, respectively, and U the on-site Coulomb energy, we calculate the phase diagram for the SWCN with chiral numbers (n(1)=3, n(2)=2), which reflects the competition between the correlation energy U and V. Within reasonable parameter ranges, we investigate possible correlated ground states, the lowest excitations, and the corresponding correlation functions in which the connection with the excitonic insulator is particularly addressed.
KOS主题词: gap
刊名: PHYSICAL REVIEW B
专题: 中国科学院半导体研究所(2009年前)_期刊论文

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Ye F; Wang BS; Lou JZ; Su ZB .Correlation effects for semiconducting single-wall carbon nanotubes: A density matrix renormalization group study ,PHYSICAL REVIEW B,2005,72(23):Art.No.233409
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