Category Archives: Reports

Report on 24th ETSF Workshop on Electronic Excitations “Light-Matter Interaction and Optical Spectroscopy from Infrared to X-Rays”

24th ETSF Workshop on Electronic Excitations: Light-Matter Interaction and Optical Spectroscopy from Infrared to X-Rays

16 – 20 September 2019

Jena (Germany)

Webpage: http://ws24.pcpm.ucl.ac.be/

Organizers: Claudia Rödl, Gabriele D’Avino, Michiel van Setten, Guido Fratesi, Elena Cannuccia, Carina Faber

Funding and support: Friedrich-Schiller-Universität Jena, Psi-k, Michael Stifel Center Jena, Abbe Center of Photonics Jena, SFB NOA, jenaparadies.de

The 24th ETSF Workshop on Electronic Excitations focused on light-matter interaction and the theoretical description of spectroscopic techniques that nowadays probe electrons, plasmons, excitons, and phonons across different energy and time scales with unprecedented accuracy. A deep physical understanding of the underlying quantum many-body effects is of paramount importance to analyze these experimental observations, extract the wealth of information therein, and ultimately render theoretical simulations predictive.
Continue reading Report on 24th ETSF Workshop on Electronic Excitations “Light-Matter Interaction and Optical Spectroscopy from Infrared to X-Rays”

Report on “ABINIT school on ground state and linear response properties”

Location: Czech Technical University, Prague, Czech Republic

Webpage: http://palata.fzu.cz/abinitschool/index.php?item=home

Dates: 2-9 September 2019.

Organizers: Eric Bousquet (University of Liège), Jiří Hlinka (Institute of Physics, Czech Acad. Sci.), Sabine Koerbel (Trinity College Dublin), Ladislav Kalvoda (Czech Technical University), Marek Paściak (Institute of Physics, Czech Academy of Science), Pavel Márton (Institute of Physics, Czech Academy of Science).

Sponsors: Psi-k Network, Institute of Physics of the Czech Academy of Sciences, University of Liège and Czech Technical University.

The goal of this ABINIT school was to teach the capabilities of the code related to ground state crystal structures (electronic density, structure relaxation, collinear and non-collinear magnetism, polarization from Berry phase, NEB, MD), response to external fields (electric and displacement field, Zeeman magnetic field) and properties obtained from linear response density functional perturbation theory (DFPT: phonons, dielectric constant, elastic and piezoelectric constants, Born effective charges, non-linear electro-optical coefficients, Raman intensities). New postprocessing techniques and tools were also tough (qAgate, Abipy, phonon projections), a preliminary introduction to the MULTIBINIT second-principles code developed aside to ABINIT to perform larger scale MD and parallelization of the code were also given.

The program consisted on 12 theoretical lectures of one hour, 3 short lectures of 30 minutes regarding the postprocessing tools, 9 practical tutorials of 1.5 hours and a session of one hour were each candidate can discuss his personal projects he wants to make with ABINIT. All the lectures and special tutorials not present on the ABINIT website can be found on the school website as pdf or zip files and will be accessible to any future person interested by them.

The lectures were given by a total of 8 different speakers:

– Xavier Gonze (Université Catholique de Louvain, Belgium)

– Fabio Finocchi (Pierre and Marie Curie University – Paris 6, France)

– Marc Torrent (CEA-DAM, Paris, France)

– Philippe Ghosez (Université de Liège, Belgium)

– Eric Bousquet (Université de Liège, Belgium)

– Gregory Geneste (CEA-DAM, Paris, France)

– Boris Dorado (CEA-DAM, Paris, France)

– Marcus Schmitt (Université de Liège, Belgium)

A total of 33 participants assisted to the school and they were coming from very diverse place in the world: Algeria, Belgium, Canada, Czech Republic, Germany, Ireland, Republic of Korea, Poland, Ethiopia, France, Luxembourg, India, Saudi Arabia, Spain, Switzerland, Sweden, UK and USA. This shows the global international interest of the school and its success.

A social diner has been organized on the 5th of September at the Pivovarsky brewery with visit of the micro-brewery and the tasting of 8 different beers produced locally.

All the student having given their feedback said to have been very satisfied or satisfied by the school and its organization and that they learned a lot even in topics they were familiar with.

Fundamental Challenges of Electron-Density-Based Approaches to Time-Dependent Processes and Open Quantum Systems

24.-26. June 2019, ETH Zürich, Switzerland

From 24th to 26th June 2019 the ElDeBaAp workshop took place at ETH Zürich, Switzerland. This workshop gathered experts on DFT, TDDFT, density cumulant theory, Green’s function approaches and density matrix methods to discuss theoretical challenges and open problems of their approaches.

ElDeBaAp group picture

For information about the participants and the discussed topics, please have a look at the workshop website https://eldebaap-workshop.ethz.ch and at the report.

Theory Meets Experiment in Low-Dimensional Structures with Correlated Electrons

This four-day workshop brought together theorists and experimenters who work on strongly correlated nanosystems adsorbed on surfaces, or on strongly correlated electrons in general. The aim of the event was to exchange ideas and discuss perspectives and future directions of characterization and description of strongly correlated nanosystems. The topics of this workshop included:

  • single-atom and single-molecule magnets, magnetic anisotropy
  • transport through nanostructures in and out of the linear-response regime
  • tuning the electronic properties via interaction with external stimuli or with a substrate
  • scanning-probe methods
  • electronic structure theory
  • advanced valence-band and core-level spectroscopies and their interpretation

Report_nano_praha2019

Book_of_abstracts_Report_nano_praha2019

18th International Conference on Density-Functional Theory and its Applications

22-26 July 2019, Alicante, Spain

The “18th International Conference on Density-Functional Theory and its Applications” was held in Alicante, Spain, in July 2019. It was the next in the great series of biennial meetings, which have taken place in Paris (1995), Vienna (1997), Rome (1999), Madrid (2001), Brussels (2003), Geneva (2005), Amsterdam (2007), Lyon (2009), Athens (2011), Durham (2013), Debrecen (2015), and Tällberg (2017).

DFT constitutes undoubtedly one of the most brilliant quantum theories developed so far, used worldwide and with outstanding applications in many scientific fields. The conference covered all range of topics, from cutting-edge developments to fascinating applications and discoveries, bringing together scientists from all around the world and from many related fields.

The scientific schedule included plenary talks (40′), invited talks (30′), contributed talks (15′), and poster sessions, with contributions to the following broad topics:

  • New developments for exchange-correlation functionals
  • Time-dependent and real-time density-functional theory
  • Application of density-functional theory in condensed matter physics
  • Application of density-functional theory in chemistry
  • Application of density-functional theory in materials science
  • Strongly correlated systems & solids

Continue reading 18th International Conference on Density-Functional Theory and its Applications

Combined events “ABINIT developer workshop” and “workshop on precision quantification in DFT” – Report

20-24 May 2019, Louvain-la-neuve, Belgium.

In order to benefit from an interesting synergy, the Abinit developer (ABIDEV) workshop 20-22/5/2019, and the workshop on precision quantification in DFT (PQ-DFT) 23-24/5/2019 were organized one after the other, in Louvain-la-neuve, Belgium. Both events attracted together more than 80  people, who attended the joint social dinner, on the evening of Wednesday 22 May.

A brief account of the ABIDEV workshop is now given, followed by the one of the PQ-DFT workshop. Links to the programs, the abstracts, the videos, the lists of participants are mentioned in the text. Group pictures  are presented at the bottom. Continue reading Combined events “ABINIT developer workshop” and “workshop on precision quantification in DFT” – Report

Young Researcher’s Workshop on Machine Learning for Material Science 2019 – report

The Young Researcher’s Workshop on Machine Learning for Material Science took place in the Aalto Design Factory, Espoo, Finland on date 06th-10th/05/2019. Workshop programme, abstract book, and workshop material (i.e. tutorial material, registration of talks and slides) for download can be found at https://ml4ms2019.aalto.fi/.

Below we resume the highlight of the event.

ML4MS SCHOOL

The first two days of the workshop involved introductory talks and a one-day long hands-on tutorial session. The aim of this initial workshop programme was to bestow the attendees with a pedagogical and practical introduction to the most established tools and techniques exploiting machine learning algorithms employed to solve outstanding problems in physical chemistry and chemical science.

On Monday, Dr. Luca Giringhelli introduced the attendees to the nuances of material space exploration via regularized and symbolic regression, together with a didactical intro on both supervised and unsupervised learning. The key role of descriptors that need to capture the complexity of the physical system under scrutiny was highlighted. A state of the art application to the agnostic and insightful classification of binary compounds was presented. The topics of open science, reproducibility and good use of repositories were also tackled in detail. Continue reading Young Researcher’s Workshop on Machine Learning for Material Science 2019 – report

3rd Daresbury QUESTAAL School

Daresbury Laboratory, UK, 13-17 May 2019

Organisers:

Daresbury: Leon Petit, Jerome Jackson, Martin Lüders

King’s College London: Mark van Schilfgaarde, Dimitar Pashov

The third Questaal school concentrated on qsGW and DMFT using the code’s new interface to the TRIQS library.  A series of tutorials enabled the 31 participants (mostly post-doctoral researchers and lecturers) to setup and run calculations starting from density functional theory and working up to GW, qsGW, LDA + Bethe Salpeter (BSE), or the inclusion of ladder diagrams in W: qsGW^BSE, and DMFT.  The participants were encouraged to experiment with a diverse range of materials, including itinerant magnets, f-electron systems, simple semiconductors and strongly correlated insulators.

In addition to the new TRIQS DMFT capability, the school also showcased recent developments in extending the GW self-energy by including phonon contributions and the first results of the new “Jigsaw Puzzle Orbital” basis, which is a full-potential analogue of the LMTO screening transformation which is short ranged and compact while still very precise. Continue reading 3rd Daresbury QUESTAAL School

Report on Workshop on Crystal Structure Prediction: Exploring the Mendeleev Table as a Palette to Design New Materials

Workshop on Crystal Structure Prediction: Exploring the Mendeleev Table as a Palette to Design New Materials

ICTP, Trieste, 14-18 January 2019

Final report

Thanks to enormous progress in computing power and in algorithm development, we are now closer to being able to predict the crystal structure of any material from the simple knowledge of its composition. This is the first necessary step for predicting in silico the property of a material, and planning modifications that could improve these properties. A critical discussion of the algorithms developed in the last years for the “in silico” prediction of crystal structures was the main theme of a workshop that took place at the Abdus Salam International Centre for Theoretical Physics (ICTP), in Trieste, Italy,  from 14 to 18 January 2019. The event, titled “Workshop on Crystal Structure Prediction: Exploring the Mendeleev Table as a Palette to Design New Materials”, focused in particular on approaches based on molecular modeling and was an opportunity to celebrate 2019 as the International Year of the Periodic Table, since crystal structure prediction is rooted in a deep knowledge of the properties of the atoms, and, in turn, numerous discoveries made with the help of crystal structure prediction, reveal new (often completely unexpected) sides of the behavior of the atoms. The Workshop was directed by the A. Laio, G. Desiraju, A. Oganov, and S. Scandolo. It was divided in two parts: the first three days were dedicated to an in-depth and critical discussion of the methods, with talks given by world experts in the field. The last two days were devoted to “hands-on” computer labs were the younger participants were given the opportunity to learn how to use the most advanced codes for crystal structure prediction, including the “Universal Structure Predictor: Evolutionary Xtallography” (USPEX) and the “Ab initio Random Structure Searching” (AIRSS). Continue reading Report on Workshop on Crystal Structure Prediction: Exploring the Mendeleev Table as a Palette to Design New Materials