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arXiv 0911.0934cond-mat.dis-nncond-mat.quant-gas
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二元无序关联格点费米子的Mott-Hubbard和Anderson金属-绝缘体跃迁

Mott-Hubbard and Anderson metal-insulator transitions in correlated lattice fermions with binary disorder

Denis Semmler, Krzysztof Byczuk, Walter Hofstetter

摘要:

研究了二元合金无序下晶体或光晶格中的强关联费米子。我们采用统计动力学平均场论,它结合了由于无序引起的局域涨落和由于相互作用引起的局域关联,来求解安德森-哈伯德模型。利用局域态密度的概率分布函数研究了无序引起的局域化。我们得到了由无序关联金属、Anderson-莫特绝缘体和带绝缘体组成的完整的顺磁基态相图。

英文摘要:

Strongly correlated fermions in a crystal or in an optical lattice in the presence of binary alloy disorder are investigated. We employ the statistical dynamical mean-field theory, which incorporates both, local fluctuations due to disorder and local correlations due to interaction, to solve the Anderson-Hubbard model. Localization due to disorder is studied by means of the probability distribution function of the local density of states. We obtain a complete paramagnetic ground state phase diagram consisting of disordered correlated metal, Anderson-Mott insulator, and band insulator.

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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