在合金类比方法中纳入半填充离子哈伯德模型的位点间空间相关性。
Inclusion of intersite spatial correlations in the alloy analogy approach to the half-filled ionic Hubbard model.
作者信息
Rowlands D A, Zhang Yu-Zhong
机构信息
Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China.
出版信息
J Phys Condens Matter. 2014 Jul 9;26(27):274201. doi: 10.1088/0953-8984/26/27/274201. Epub 2014 Jun 17.
Using the nonlocal coherent-potential approximation we study the effect of intersite spatial correlations on the transition from band insulator to metal as well as from metal to Mott insulator in the 'alloy analogy' approach to the paramagnetic solution of the half-filled ionic Hubbard model. We find that intersite spatial correlations enhance the metallic phase.
我们使用非局域相干势近似，在半填充离子哈伯德模型顺磁解的“合金类比”方法中，研究格点间空间关联对从带绝缘体到金属以及从金属到莫特绝缘体转变的影响。我们发现格点间空间关联增强了金属相。
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