Fermi surface symmetric mass generation and its application in nickelate superconductor

12/08/2023 2:30 pm - 4:00 pm
CMSA Room G10
Address: CMSA, 20 Garden Street, Cambridge, MA 02138 USA

Joint Quantum Matter in Mathematics and Physics & Topological Quantum Matter Seminar

Speaker: Da-Chuan Lu (UCSD)

Title: Fermi surface symmetric mass generation and its application in nickelate superconductor

Abstract: Symmetric mass generation (SMG) is a novel interaction-driven mechanism that generates fermion mass without breaking symmetry, unlike the standard Anderson-Higgs mechanism. SMG can occur in the fermion system without quantum anomalies. In this talk, I will focus on the SMG for the systems with finite fermion density, i.e., the Fermi surface. I will discuss the Fermi surface anomaly and Fermi surface SMG. Lastly, I will talk about its application in the newly found nickelate superconductors, where the superconductivity emerges without a nearby spontaneous symmetry-breaking phase.