CHARGE MASS SINGULARITY IN 2-DIMENSIONAL HUBBARD-MODEL

被引：74
作者：
FURUKAWA, N
IMADA, M
机构：
[1] Institute for Solid State Physics, University of Tokyo, Minato-ku, Tokyo 106
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1993年 / 62卷 / 08期
关键词：
HUBBARD MODEL; MOTT TRANSITION; METAL-INSULATOR TRANSITION; QUANTUM MONTE-CARLO; STRONG CORRELATION; CHARGE SUSCEPTIBILITY; MASS SINGULARITY; UNIVERSALITY;
D O I：
10.1143/JPSJ.62.2557
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Two-dimensional Hubbard model with both nearest- and next-nearest-neighbor transfers is studied. A singularity in the charge susceptibility at the Mott transition point delta-->0 is observed, leading to the anomaly of the charge mass m(c)* in the form m(c)* is-proportional-to Absolute value of delta-1, where delta is the doping concentration. The singularity is similar to that in the case without the next-nearest-neighbor transfer. This indicates that the singularity in the charge mass is a universal nature of this model, irrespective of its band structure.
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收藏
页码：2557 / 2560
页数：4
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