Coexistence of distinct charge fluctuations in θ-(BEDT-TTF)2X
Coexistence of distinct charge fluctuations in θ-(BEDT-TTF)2X
复制标题
θ-(BEDT-TTF)2X 中不同电荷波动的共存
DOI:
10.1103/physrevb.78.035113
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发表时间:
2008
影响因子:
3.7
通讯作者:
Y. Ohta
中科院分区:
文献类型:
--
作者:
S. Nishimoto;M. Shingai;Y. Ohta
Using the Lanczos exact-diagonalization and density-matrix renormalization group methods, we study the extended Hubbard model at quarter filling defined on the anisotropic triangular lattice. We focus on charge ordering (CO) phenomena induced by onsite and intersite Coulomb interactions. We determine the ground-state phase diagram including three CO phases, i.e., diagonal, vertical, and three-fold CO phases, based on the calculated results of the hole density and double occupancy. We also calculate the dynamical density-density correlation functions and find possible coexistence of the diagonal and three-fold charge fluctuations in a certain parameter region where the onsite and intersite interactions compete. Furthermore, the characteristic features of the optical conductivity for each CO phase are discussed.
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DOI:
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发表时间:
2020
期刊:
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作者:
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DOI:
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发表时间:
2005
期刊:
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发表时间:
2006
期刊:
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作者:
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DOI:
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发表时间:
2005
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