Low-Dimentional Electron Liquids Group

The main activity of this group is addressed to the study of phase diagrams, quantum phase transitions, transport properties, and light-matter interaction in systems of electrons having dimensionality two and one. We have focused on quantum many-body physics, specifically in understanding correlations in two-dimensional electron gas (2DEG) systems, few-layer doped graphene, transition metal dichalcogenides, and phosphorene systems, as well as the many-body physics of cold atom gases in reduced spatial dimensions. We developed efficient computational methods based on rigorous theoretical principles to calculate pair distribution functions, allowing for detailed microscopic calculations of Landau parameters and spin fluctuation effects. Our investigations covered ground-state properties, many-body effects, quasiparticle properties, collective modes such as plasmons and plasmarons, quantum nonlocality, strain effects, conductivities, and graphene surface morphology in monolayer and bilayer systems. On MoS₂ we involved developing an effective lattice Hamiltonian to describe low-energy band structure, capturing phenomena like the valley-Zeeman effect and valley-degeneracy-breaking on Landau levels. This research extended to studying nonlinear optical properties, spintronics, alongside magnetic phase transitions, strain effects in nanoribbons, and many-body renormalization properties.