Mercoledì  6 novembre 

 in Sala Lauree (Ed. Marconi)

si terranno i seminari dei vincitori delle procedure valutative ex. art. 24 L.240 (Tenure Track) Lilia Boeri e Cristiano De Michele

Ore 14.00 Dr.ssa Lilia Boeri

Near Room-Temperature Superconductivity in High-Pressure Hydrides:
A success story for ab-initio material design
In the last few years the parallel development of novel synthesis techniques and electronic structure
methods for crystal structure prediction is gradually shifting the focus of condensed matter research
from the description to the design of new materials and functionalities.
The recent discovery of near-room-temperature superconductivity in high-pressure hydrides is one
of the most spectacular demonstration of this evolution.[1]
In this talk I will present the most recent developments in the field, highlighting my own contribution
to the prediction and understanding of high-Tc superconductivity in binary and ternary hydrides.[2]
[1] A. P. Drozdov et al, Nature 525, 73 (2015); M. Somayazulu et al, Phys. Rev. Lett. 122, 027001
(2019); A.P. Drozdov et al, Nature 569, 528 (2019); I.A. Troyan et al., cond-mat/1908.01534; P.P.
Kong et al., cond-mat/1909.10482.
[2] J. A. Flores-Livas, L. Boeri, A. Sanna, G. Profeta, R. Arita, M. Eremets, cond-mat/1905.06693;
C. Heil, S. di Cataldo, G.B. Bachelet, L. Boeri, Phys. Rev. B 99, 220502 (2019); C. Heil, G. B.
Bachelet, and L.Boeri, Phys. Rev. B 97, 214510 (2018); C. Kokail, W. von der Linden, and L. Boeri,
Phys. Rev. Materials 1, 074803 (2017); J. A. Flores-Livas, A. Sanna, A. P. Drozdov, L. Boeri, G.
Profeta, M. Eremets, and S. Goedecker, Phys. Rev. Materials 1, 024802 (2017).

Ore 14.30 Dr. Cristiano De Michele
Soft Mesophases

Colloidal systems can be challenging to study due to the presence of multi scale effects, extending from tenth of nanometers (solvent) up to sub-micro particle-particle correlations.
Multi-scale approach combining theory and computer simulations provides a suitable framework for modelling these systems.
At the bottom level, atomistic simulations of macromolecules are performed to estimate parameters that serve as inputs for the theory or for coarse-grained models.
After that, affordable computer simulations of minimalist models or the theoretical machinery are put in action to provide quantitative predictions on the system under investigation. In the talk, I will focus on two recent developments:
(i) a theoretical approach for calculating the elastic and thermodynamic properties of liquid crystals and
(ii) a coarse-grained model of epoxy resins which allowed to afford theoretical insight into autocatalytic reactions.
In passing, I will also discuss novel algoithms which I developed for carrying out fast computer simulations. Finally, I will discuss an interesting analogy between Abrikosov vortices and colloidal systems, which makes soft matter physics more ubiquitous than expected.

L' Università degli Studi di Roma "La Sapienza" - Piazzale Aldo Moro 5, 00185 Roma