CMSP

Europe/Rome 2021-09-24 11:00:00 2021-09-24 12:00:00 CMSP Seminar (Atomistic Simulation Webinar Series): Raman frequencies of diamond under non-hydrostatic pressure The Raman frequencies of diamond subjected to non-hydrostatic uniaxial stress along the [001] and [111] crystallographic axes have been calculated with density-functional-theory methods and the results fitted to a simple analytical form. The data are analyzed in the context of the recently proposed use of the shift of the high-frequency edge of the Raman band of diamond as a pressure scale in diamond-anvil cell experiments. Combining theoretical and experimental data we are able to determine the stress state of the diamond anvil in ultra-high-pressure experiments. We find that shear stresses close to the tip of the anvil can reach values exceeding 1 Mbar. Registration details will be announced closer to the seminar date. Virtual ICTP pio@ictp.it 24 Sep 2021

Europe/Rome 2021-09-30 11:00:00 2021-09-30 12:00:00 CMSP Seminar (News and Views): Theory and simulation of electronic stopping of nuclear projectiles traversing matter Abstract:   Nuclei shooting through matter transfer energy to the electrons along its trajectory at rates of up to keV per Angstrom. This rate depends on the projectile velocity, peaking when this velocity is similar to average electron velocities in the system, typically around two to five percent of the speed of light. Because of its interest to radiation damage in various contexts (mostly nuclear, aerospace, and medical), the problem has  been studied for over a century, but surprisingly there is still a lot to be learned about the microscopic processes taking place beyond what obtained from perturbative approaches. The reason is that, although it is a quite fundamental, general, unsophisticated problem (charged point particles moving through condensed matter), it is strongly non-adiabatic and very strongly far from equilibrium. It is also nanoscopic (around the projectile) and of quantum nature. I will present our efforts in advancing our understanding of such processes by means of simulations based on time-dependent density-functional theory in real time, but also some notes on theoretical and methodological advances prompted by the problem. In particular, a Floquet formulation for constant-velocity projectiles traveling along periodic directions in solids, as well as, time permitting, on geometrical aspects of dealing with quantum evolution in an evolving Hilbert space, which we had to face given our use of atomic orbitals as basis sets. Zoom registration link will be announced closer to the seminar date.   Virtual ICTP pio@ictp.it 30 Sep 2021

Europe/Rome 2021-11-22 07:00:00 2021-11-25 21:00:00 Light-matter Interactions from scratch: Theory and Experiments at the Border with Biology | (smr 3637) This virtual Workshop will bring together young researchers from all over the world and established scientists working on the interaction of light with biological matter. A variety of perspectives will provide interdisciplinary contents of both introductory and advanced nature. Multidisciplinarity, theory and experiments, as well as different backgrounds are crucial to understanding the diversity of phenomena and the fundamental processes that govern the complex interaction of light with living matter. This online format is an adaptation of the ICTP school and workshop originally planned in IISER, Trivandrum, India, to promote scientific development and exchanges in the whole area. The programme will include: • oral invited presentations by high-profile senior scientists, covering introductory aspects and most recent research developments; • young researchers’ contributed talks; • poster presentations through virtual poster sessions. Topics: • advanced spectroscopy and imaging to probe bio-interfaces; • dynamical processes: electron and energy transfers, quantum biology; • excited states, photophysics and photochemistry in biological matter. Preliminary list of speakers: Ellen Backus, University of Wien Ross McKenzie, University of Queensland Henrik Ottosson, Uppsala University Igor Schapiro, Hebrew University of Jerusalem Massimo Trotta, Consiglio Nazionale delle Ricerche at Bari Julia Weinstein, University of Sheffield Call for contributed posters / contributed talks: Applicants are encouraged to present their work through posters or contributed talks. Candidates wishing to do so will be requested to upload relevant abstracts in PDF format during application process. Please make sure you use our templates to generate such PDFs. Templates are available below for download. Online application is open (via the "Apply here" button, or here, directly. Deadline for application: 15 October 2021 (midnight, Rome time)   Online - ICTP pio@ictp.it 22 Nov 2021 - 25 Nov 2021

Europe/Rome 2021-12-06 07:00:00 2021-12-17 21:00:00 School on Synchrotron Light Sources and their Applications | (smr 3611) An ICTP Virtual Meeting Registration: there is no registration fee. Online - ICTP pio@ictp.it 6 Dec 2021 - 17 Dec 2021