Non-Fermi Liquid Behavior in the Three-Dimensional Hubbard Model

被引:1
作者
Kellar, Samuel [1 ]
Tam, Ka-Ming [1 ,2 ]
Moreno, Juana [1 ,2 ]
机构
[1] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA
[2] Louisiana State Univ, Ctr Computat & Technol, Baton Rouge, LA 70803 USA
基金
美国国家科学基金会;
关键词
metal insulator transition; Mott transition; random disorder; dynamical cluster approximation; non-Fermi liquid; marginal Fermi liquid; Hubbard model; QUANTUM-CRITICAL-POINT; SPIN FLUCTUATIONS; NORMAL-STATE; PHASE; SUPERCONDUCTIVITY; PHENOMENOLOGY; TEMPERATURE; DYNAMICS;
D O I
10.3390/cryst13010106
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
We present a numerical study on the non-Fermi liquid behavior of a three-dimensional strongly correlated system. The Hubbard model in a simple cubic lattice is simulated by the dynamical cluster approximation; in particular, the quasi-particle weight is calculated at finite dopings for a range of temperatures. By fitting the quasi-particle weight to the marginal Fermi liquid form at finite doping near the putative quantum critical point, we find evidence of a separatrix between Fermi liquid and non-Fermi liquid regions. Our results suggest that a marginal Fermi liquid and possibly a quantum critical point exist in the non-symmetry broken solution of the three-dimensional interacting electron systems. We also calculate the spectral function, close to the half-filling, and we obtain evidence of pseudogap.
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页数:13
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