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arXiv 0812.1071cond-mat.str-elcond-mat.mtrl-sci
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无限维半满哈伯德模型的通有可解性

Generic susceptibilities of the half-filled Hubbard model in infinite dimensions

Carsten Raas, Götz S. Uhrig

摘要:

在排斥相互作用驱动的金属-绝缘体相变(Mott相变)中,单粒子激发和集体激发同等重要。本文给出了无限维半满哈伯德模型在零温度下的类属磁化率的结果。从高分辨率的动态密度矩阵重整化在所有能量的收益,结果计算的电荷,自旋和铜对在金属和绝缘相的磁化率。在绝缘阶段,出现了一个几乎饱和的局部磁矩。在金属相中,在自旋响应中发现明显的低能峰。

英文摘要:

Around a metal-to-insulator transition driven by repulsive interaction (Mott transition) the single particle excitations and the collective excitations are equally important. Here we present results for the generic susceptibilities at zero temperature in the half-filled Hubbard model in infinite dimensions. Profiting from the high resolution of dynamic density-matrix renormalization at all energies, results for the charge, spin and Cooper-pair susceptibilities in the metallic and the insulating phase are computed. In the insulating phase, an almost saturated local magnetic moment appears. In the metallic phase a pronounced low-energy peak is found in the spin response.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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