来自相互作用双折射费米子的相对论性非费米子液体：一个强有力的超普适性
Relativistic non-Fermi liquid from interacting birefringent fermions: A robust superuniversality
摘要：
研究了自旋为3/2的双折射费米子在自发对称性破缺和强局域或类Hubbard排斥作用下的巡回Mott跃迁附近出现的量子临界现象。不管在有序相中产生完全带隙准粒子谱的质量有序的性质如何，否则可以分为三类，系统总是在相应的量子临界点附近具有\emph{unique}终极速度。相关联的临界制度容纳了相对论性非费米液体的强耦合集体玻色子和自旋1/2狄拉克激发消失的准粒子极的重量。这些结论在超导临界点附近也是有效的。因此，相对论性非费米液体可能构成一个强大的超普适描述的整个家庭的强关联任意半整数自旋狄拉克材料。
英文摘要：
We address the emergent quantum critical phenomena for (pseudo)spin-3/2 birefringent fermions, featuring two effective Fermi velocities, when they reside close to itinerant Mott transitions realized through spontaneous symmetry breaking and triggered by strong local or Hubbardlike repulsive interactions. Irrespective of the nature of the mass orderings that produce fully gapped quasiparticle spectra in the ordered phase, which otherwise can be grouped into three classes, the system always possesses a \emph{unique} terminal velocity near the corresponding quantum critical point. The associated critical regime accommodates a relativistic non-Fermi liquid of strongly coupled collective bosonic and spin-1/2 Dirac excitations with vanishing weight of the quasiparticle pole. These conclusions are also operative near superconducting critical points. Therefore, relativistic non-Fermi liquid possibly constitutes a robust superuniversal description for the entire family of strongly correlated arbitrary half-integer spin Dirac materials.
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