Disorder and interaction in 2D: exact diagonalization study of the Anderson-Hubbard-Mott model.
Disorder and interaction in 2D: exact diagonalization study of the Anderson-Hubbard-Mott model.
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二维无序和相互作用：Anderson-Hubbard-Mott 模型的精确对角化研究。
DOI：
10.1103/physrevlett.86.2388
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发表时间：
2000
影响因子：
8.6
通讯作者：
S. Das Sarma
中科院分区：
文献类型：
--
作者：
R. Kotlyar;S. Das Sarma
利用有限尺寸精确对角化技术，通过数值计算电荷刚度，研究了随机对角无序和电子-电子相互作用对二维Hubbard模型基态性质的影响。通过与相应的一维Hubbard模型结果的比较和启发式论证，我们得出结论：尽管在某些参数范围内相互作用的影响显著地增强了非相互作用的电荷刚性，但不太可能存在二维金属-绝缘体量子相变。
We investigate, by numerically calculating the charge stiffness, the effects of random diagonal disorder and electron-electron interaction on the nature of the ground state in the 2D Hubbard model through the finite-size exact diagonalization technique. By comparing with the corresponding 1D Hubbard model results and by using heuristic arguments we conclude that it is unlikely that there is a 2D metal-insulator quantum phase transition, although the effect of interaction in some range of parameters is to substantially enhance the noninteracting charge stiffness.