Motivated by the recent progress of nickelate superconductors, we explored Hubbard-type multi-orbital models focusing on the superconducting instability, non-Fermi liquid behavior, and charge density wave states. In particular, we showed that an additional dry metallic band can shift the SC dome of the correlated Hubbard band towards the overdoped regime, namely the d-wave SC can be enhanced (suppressed) in the overdoped (underdoped) regime. Besides, the simulations of three-orbital Emery model showed fruitful non-Fermi liquid behavior in both parameters regimes relevant for cuprates and nickelates. Finally, our recent investigation demonstrated the transition between charge density wave states and homogeneous states in a cluster model for La3Ni2O7.

报告人简介

蒋密，2014年于美国加州大学戴维斯分校获得博士学位，2014-2020年在瑞士ETH和加拿大UBC从事博士后研究工作，2021年加入苏州大学物理科学与技术学院。研究兴趣集中在对各类强关联电子体系，如非常规超导体，重费米子材料等的理论和计算研究。近期研究方向侧重于新近发现的镍基超导体系和重费米子体系。

邀请人

吴贤新 副研究员