The kagome Hubbard model from a functional renormalization group perspective
arxiv(2024)
摘要
The recent discovery of a variety of intricate electronic order in kagome
metals has sprouted significant theoretical and experimental interest. From an
electronic perspective on the potential microscopic origin of these phases, the
most basic model is given by a Hubbard model on the kagome lattice. We employ
functional renormalization group (FRG) to analyze the kagome Hubbard model.
Through our methodological refinement of FRG both within its N-patch and
truncated unity formulation, we resolve previous discrepancies of different FRG
approaches (Wang et al., 2013 vs. Kiesel et al., 2013), and analyze both the
pure (p-type) and mixed (m-type) van Hove fillings of the kagome lattice.
We further study the RG flow into symmetry broken phases to identify the
energetically preferred linear combination of the respective order parameter
without any need for additional mean field analysis. Our findings suggest some
consistency with recent experiments, and underline the richness of electronic
phases already found in the kagome Hubbard model. We also provide a no-go
theorem for a complex charge bond ordered phase in the single orbital kagome
Hubbard model, suggesting that this model cannot capture aspects of orbital
current phases.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要