论文标题
在三维哈伯德模型中的非Fermi液体行为
Non-Fermi Liquid Behaviour in the Three Dimensional Hubbard Model
论文作者
论文摘要
我们提出了一项关于三维系统非Fermi液体行为的数值研究。通过动态群集近似模拟了立方晶格中的哈伯德模型，特别是在有限掺杂的一系列温度下计算了准粒子重量。在推定的量子临界点附近，我们发现有限掺杂处的分离质的证据，该掺杂将费米液体与非芬特液体分开，随着掺杂的增加。我们的结果表明，边际费米液体和可能存在的量子临界点应存在于相互作用的三个维度中。
We present a numerical study on non-Fermi liquid behaviour of a three dimensional system. The Hubbard model in a 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. Near the putative quantum critical point, we find evidence of a separatrix at a finite doping which separates the Fermi liquid from non-Fermi liquid as the doping increases. Our results suggest that a marginal Fermi liquid and possibly a quantum critical point should exist in the three dimensions interacting Fermi system.
