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Main interest of my research activity is the investigation of the many-body problems in solid state physics. Many-body effects in this field are indeed common to a large variety of phenomena related to the electron-lattice and to the electron-electron interaction. Large part of my activity in the past years has focused on the study of the high-Tc superconductivity, not only in cuprates, but also iron-based pnictides, in fullerides, in MgB2 alloys and hydrides under pressure. My recent work is mainly focused on the investigation of electronic, transport and optical properties of graphene and post-graphenic (transition-metal dichalcogenides) two-dimensional systems.
My work is mainly based on the analytical techniques of Quantum Field Theory in Condensed Matter, but I have also an operative knowledge of numerical techniques. At the same time, the investigation of the basilar properties of paradigmatic theoretical models (Holstein, Hubbard, t-J, …) is also accompanied by a strong interest towards the investigation and the explanation of the specific properties of real materials. Along this line I acknowledge and enjoy fruitful cooperations with computational (DFT, DMFT,…) and experimental groups.
Main scientific achievements
- Local bandgap engineering by local strain in transition-metal dichalcogenides;
- Unified Fano-Rice theory of spectral properties of infrared phonons in graphenes;
- Flux-phases and d-density wave ordering in cuprates;
- Dielectric and non-linear screening properties in layered materials;
- Tight-binding modeling of transition-metal dichalcogenides;
- Nonadiabatic theory of superconductivity in low-density carrier superconductors;
- Multiband/multigap superconductivity and transport in iron-pnictides;
- Spin-lattice polarons in lighly doped cuprates and ntiferromagnetic systems;
- Local surface melting and isotope melting in classic and quantum solids; perspectives for supersolidity;
- Unconventional electron properties in low-carrier density Rashba systems;
- Renormalization of electron-phonon interaction in correlated electron systems.