Disorder-induced stabilization of the pseudogap in strongly correlated systems

被引:42
作者
Chiesa, Simone [1 ]
Chakraborty, Prabuddha B. [1 ]
Pickett, Warren E. [1 ]
Scalettar, Richard T. [1 ]
机构
[1] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA
关键词
D O I
10.1103/PhysRevLett.101.086401
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The interplay of strong interaction and strong disorder, as contained in the Anderson-Hubbard model, is addressed using two nonperturbative numerical methods: the Lanczos algorithm in the grand canonical ensemble at zero temperature and quantum Monte Carlo simulations. We find distinctive evidence for a zero-energy anomaly which is robust upon variation of doping, disorder, and interaction strength. Its similarities to, and differences from, pseudogap formation in other contexts, including perturbative treatments of interactions and disorder, classical theories of localized charges, and in the clean Hubbard model, are discussed.
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页数:4
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