从双束缚电子到相对论性自旋1/2费米子的边缘或非费米液体：一种突现的超普适性
From Birefringent Electrons to a Marginal or Non-Fermi Liquid of Relativistic Spin-1/2 Fermions: An Emergent Superuniversality
摘要：
我们提出了准相对论性伪自旋3/2费米子的节相互作用费米液体的量子临界理论，该费米子具有具有两个不同费米速度的非相互作用双折射光谱。当这种准粒子与介导长程库仑相互作用或其短程分量的无隙玻色子自由度相互作用时，（负责自发对称性破缺），在深红外或量子临界区的二维系统分别描述为边缘或非费米液体的相对论自旋1/2费米子（具有唯一的速度），并且在三维中总是边缘费米液体。我们认为，这些情况下，一个任意的半奇数自旋的费米子可能的推广，并推测，临界自旋1/2激发代表了一个超普遍的描述整个家庭的相互作用准相对论费米子。
英文摘要：
We present the quantum critical theory of an interacting nodal Fermi-liquid of quasi-relativisitc pseudo-spin-3/2 fermions that have a non-interacting birefringent spectrum with two distinct Fermi velocities. When such quasiparticles interact with gapless bosonic degrees of freedom that mediate either the long-range Coulomb interaction or its short range component (responsible for spontaneous symmetry breaking), in the deep infrared or quantum critical regime in two dimensions the system is respectively described by a marginal- or a non-Fermi liquid of relativistic spin-1/2 fermions (possessing a unique velocity), and is always a marginal Fermi liquid in three dimensions. We consider a possible generalization of these scenarios to fermions with an arbitrary half-odd-integer spin, and conjecture that critical spin-1/2 excitations represent a superuniversal description of the entire family of interacting quasi-relativistic fermions.
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