论文标题
在掺杂的正交金属的晶格模型中的Fermi Arcs和Pseudogap
Fermi arcs and pseudogap in a lattice model of a doped orthogonal metal
论文作者
论文摘要
自从在被压倒式丘陵中发现伪PSEUDOGAP和FERMI弧状状态以来,对这种非粉状液体状态的理解以及相关的违反Luttinger定理一直是相关的电子系统中的核心主题。然而,仍然缺乏一个很好的理论框架,可以明确地解释这些金属状态,这些金属状态显然超出了兰道的费米液体和费米表面和电子填充的Luttinger定理。在这里,我们设计了一个与拓扑顺序结合的正交金属的晶格模型,并通过通过无偏的量子蒙特卡洛模拟在通用电子填充物上求解该模型,发现该系统与福特型和Pseudogap的现象相结合的单个福特层中的fermi Arc和Pseudogap现象超出了fermi arc和Pseudogap的现象。伪PSEUDOGAP和FERMI ARCS与脱糊状的Z2量规场并存,我们进一步发现,仪表场的限制过渡触发了超导性的不稳定性,并且仪表中性速度的跳跃从Fermi fermi farmi farmi farmi farmi farmi farmi farmi。我们的公正数值结果为仪表场与费米子之间的耦合提供了一个具体的模型实现和理论框架,并在此过程中产生了伪库的丰富现象,费米亚弧,以及通用相关电子系统的超导性。
Since the discovery of the pseudogap and Fermi arc states in underdoped cuprates, the understanding of such non-Fermi-liquid states and the associated violation of Luttinger's theorem have been the central theme in correlated electron systems. However, still lacking is a well-accepted theoretical framework to unambiguously explain these metallic states that are clearly beyond Landau's Fermi liquid and Luttinger's theorem of a Fermi surface and electron filling. Here, we design a lattice model of orthogonal metals with fermion and Ising matter fields coupled to topological order and, by solving the model via unbiased quantum Monte Carlo simulation at generic electron fillings, find that the system gives birth to phenomena of the Fermi arc and pseudogap in the single-particle spectrum that go beyond the Luttinger sum rule with broken Fermi surface but no symmetry breaking. The pseudogap and Fermi arcs coexist with a background of a deconfined Z2 gauge field, and we further find that the confinement transition of the gauge field triggers a superconductivity instability and that the hopping of the gauge-neutral fermions brings the "large" Fermi surface back from the Fermi arc state. Our unbiased numerical results provide a concrete model realization and theoretical framework for the coupling between gauge field and fermions and, in the process, generate the rich phenomena of the pseudogap, the Fermi arc, and superconductivity in generic correlated electron systems.