Programme

P.34 -- Posters, VCTP-51

Date: Tuesday, 4 August 2026

Time: 09:30 - 10:30

Study of non-Fermi liquid behavior in the low-energy flat bands of twisted transition metal dichalcogenides

Son Trong Nguyen (1), Duy Hoang Nguyen (1), Hung The Dang (1)

(1) Faculty of Materials Science and Engineering, Phenikaa University

Fermi liquid is the de facto theory for strongly correlated systems. Therefore, finding materials exhibiting non-Fermi liquid behaviors is an important but non-trivial task for researchers in this field. In this work, we consider the two-dimensional Hubbard model in triangular lattice including spin-valley locking effect, which reflects the low-energy flat bands of twisted transitional metal dichalcogenide structures. By change the phase angle encoded in the model, which is related to the displacement field in the corresponding experiments of the twisted structures, we may enter the non-Fermi liquid regime, in which we study various physical quantities such as the mass enhancement, spin susceptibility using the dynamical mean-field theory. The study of these measurements for a wide range of the correlation strength provides more insights into the physics of the non-Fermi liquid vs. Fermi liquid behaviors that might be observed in the twisted structures of transition metal dichalcogenides.

Presenter: Nguyen Trong Son