Programme

P.15 -- Posters, VCTP-50

Date: Tuesday, 5 August 2025

Time: 08:30 - 10:00

Many-Body Effects and Velocity Renormalization in Doped Monolayer MoS₂

Le Van Tan

Laboratory of Applied Physics, Science and Technology Advanced Institute, Van Lang University, Ho Chi Minh City, Vietnam; Faculty of Applied Technology, School of Engineering and Technology, Van Lang University, Ho Chi Minh City, Vietnam

We study electron-electron interactions in doped monolayer MoS₂ using a massless Dirac model and random phase approximation with a modified Keldysh potential. Our results predict many-body effects on the spectral function, quasiparticle dispersion, and velocity at zero and finite temperatures, considering carrier density, electric field, and spin polarization. We find strong many-body signatures and spectral instabilities at low densities and small wave vectors. The velocity renormalization shows a linear temperature correction and complex temperature dependence, with notable differences between on-shell and Dyson self-energy approaches.

Presenter: Le Van Tan