3 papers
cond-mat.str-el2026
Nonpertubative Many-Body Theory for the Two-Dimensional Hubbard Model at Low Temperature: From Weak to Strong Coupling Regimes
Ruitao Xiao, Yingze Su, Junnian Xiong +3
In theoretical studies of two-dimensional (2D) systems, the Mermin-Wagner theorem prevents continuous symmetry breaking at any finite temperature, thus forbidding a Landau phase tr…
cond-mat.str-el2025
Effects of the pseudogap and the Fermi surface on the rapid Hall-coefficient changes in cuprates
Yingze Su, Hui Li, Huaqing Huang +1
High- cuprates are characterized by strong spin fluctuations, which give rise to antiferromagnetic and pseudogap phases and may be key to the high superconducting critical tem…
cond-mat.str-el2025
Application of Many-body Non-perturbative Theories to the Three-Dimensional Attractive Hubbard Model
Junnian Xiong, Hui Li, Yingze Su +1
The attractive Fermi-Hubbard model stands out as a simple model for studying the pairing and superconductivity of fermions on a lattice. In this article, we apply several many-body…