Concepts de base
本文提出並分析了一個包含強關聯效應的外爾半金屬模型,發現系統中出現了一種新的拓撲缺陷——外爾-莫特點,它是一個孤立的格林函數零點,並繼承了原始外爾點的拓撲荷,導致了強關聯手性反常和非費米液體行為的出現。
Stats
對於 1 < M < 3,系統描述了一個具有外爾節點的外爾半金屬。
當 µ = U/2 時,系統處於半填充狀態。
外爾-莫特點的拓撲荷為 ±1。
當 0 < µ < U 時,系統的佔據數保持在半填充。
Citations
"We define a Weyl-Mott point as a point in momentum space where an isolated Green’s function zero appears in the gap formed by the splitting of a Weyl point in the Green’s function poles."
"The chiral anomaly previously predicted via a mean-field treatment can thus be reinterpreted even in the strongly-interacting limit as arising from the Weyl-Mott point."
"We have argued that the chiral anomaly in this strongly-interacting setting now emerges from the Weyl-Mott point, and that we expect the Weyl-Mott point to be associated with the presence of Fermi arcs at the surface of the sample."