Magnetic properties of the two-dimensional Hubbard model

被引：0
|
作者：
Mancini, F. [1 ]
Marra, S. [1 ]
Matsumoto, H. [1 ]
机构：
[1] Universita di Salerno, Baronissi, Italy
来源：
| 1996年 / Elsevier Science B.V., Amsterdam, Netherlands卷 / 263期
关键词：
Band structure - Doping (additives) - Lanthanum compounds - Magnetic permeability - Magnetism - Mathematical models - Numerical analysis - Superconductivity - Thermal effects;
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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 δ(x) 2x; in the region x 0.16-0.18, where higher critical temperatures are experimentally observed, the magnitude starts to decrease and vanishes at x 0.27, where superconductivity experimentally disappears.
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