Magnetic properties of the two-dimensional Hubbard model

被引：4
|
作者：
Mancini, F
Marra, S
Matsumoto, H
机构：
[1] UNIV SALERNO,DIPARTIMENTO FIS TEOR,I-84140 BARONISSI,SA,ITALY
[2] UNIV SALERNO,SMSA,I-84140 BARONISSI,SA,ITALY
[3] TOHOKU UNIV,INST MAT RES,SENDAI,MIYAGI 980,JAPAN
来源：
PHYSICA C | 1996年 / 263卷 / 1-4期
关键词：
D O I：
10.1016/0921-4534(95)00744-X
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The spin magnetic susceptibility for the two-dimensional one-band Hubbard model is calculated by means of the composite operator method. The results are in qualitative agreement with the experimental situation in La2-xSrxCuO4 systems. When the system is doped away from half-filling, incommensurate magnetism is observed; the magnitude of incommensurability increases on increasing the hole concentration, following quite well the experimental law delta(x) approximate to 2x; in the region x approximate to 0.16-0.18, where higher critical temperatures are experimentally observed. the magnitude starts to decrease and vanishes at x approximate to 0.27, where superconductivity experimentally disappears.
引用
收藏
页码：70 / 73
页数：4
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