GROUND STATE OF THE 2D EXTENDED HUBBARD MODEL WITH MORE THAN NEAREST-NEIGHBOR INTERACTIONS

被引：6

作者：

Harir, S. ^{[1
]}

Bennai, M. ^{[1
,2
]}

Boughaleb, Y. ^{[1
,3
,4
]}

机构：

[1] Univ Hassan II Mohammedia Casablanca, Phys Mat Condensee Lab, URAC10, Fac Sci Ben MSik, Casablanca, Morocco

[2] LabUFR PHE, Grp Natl Phys Hautes Energies, Rabat, Morocco

[3] Univ Chouaib Doukkali, Fac Sci, El Jadida, Morocco

[4] Hassan II Acad Sci & Technol, Rabat, Morocco

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2012年 / 26卷 / 29期

关键词：

Extended Hubbard model; ground state; phase diagram;

D O I：

10.1142/S0217979212501561

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigate the ground state phase diagram of the two dimensional Extended Hubbard Model (EHM) with more than Nearest-Neighbor (NN) interactions for finite size system at low concentration. This EHM is solved analytically for finite square lattice at one-eighth filling. All eigenvalues and eigenvectors are given as a function of the on-site repulsion energy U and the off-site interaction energy V-ij. The behavior of the ground state energy exhibits the emergence of phase diagram. The obtained results clearly underline that interactions exceeding NN distances in range can significantly influence the emergence of the ground state conductor-insulator transition.

引用

页数：7

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