The proposal titled “New Frontiers for Material Modeling via Machine Learning Techniques with Quantum Monte Carlo” was awarded a 2019 Innovative and Novel Computational Impact on Theory and Experiment (INCITE) grant by the U.S. Department of Energy’s Office of Science. The project lead by Dario Alfè and in collaboration with Gábor Csányi in Cambridge involves Angelos, Andrea and Gerit, who will have access to 1.25 million node-hours on some of the most powerful U.S. supercomputers. These resources are required to perform computationally very demanding quantum Monte Carlo simulations to provide highly accurate reference data for the adsorption of water on graphene, which will be used to build a machine learning potential. The importance of this work is stressed by being presented as one of six allocation highlights in the INCITE award announcement. You can find out more about the projects here.
The next issue of The Journal of Physical Chemistry Letters will feature cover art from the perspective article ‘Lonely Atoms with Special Gifts: Breaking Linear Scaling Relationships in Heterogeneous Catalysis with Single-Atom Alloys’ by Matthew T. Darby, Michail Stamatakis, Angelos Michaelides, and E. Charles H. Sykes. The cover depicts the atomic structure of a so-called single-atom alloy, which is bimetallic alloy with a low concentration of the catalytically active component. One of these active sites prominently features a methane molecule after C-H bond activation. Dispersing the active component offers potential for well-defined and enhanced catalytic performance.
View the full cover page here. The article itself can be found here (or on our publications site).
After last year’s phenomenal victory, the ICE group is participating for the second time in the Hever Castle Triathlon. This year, there will be two relay teams: Phil, Gabriele, and Angelos will compete again in the half-ironman, while Andrea, his wife Sara, and Patrick will compete over the Olympic distance.
The ICE group is not only trying to defend the title but also hoping to repeat the success of last year’s fundraising campaign for WaterAid. Please have a look at our charity page, and many thanks to all past and future supporters!
A position for a Research Associate in Computational Catalysis is now open. The project about methane activation at single atom alloys involves collaboration with Dr Michail Stamatakis and Prof. Charlie Sykes. To find out more or to apply, click here.
Michael won a prize for the Best Final Year MSci presentation in the Condensed Matter and Materials Physics (CMMP) group for his project on ice nucleation titled “Achieving Cubic Ice”. Congratulations!
The ICE group is currently looking forward to recruit new members. One Postdoc position and two PhD positions are open for applications. Details can be found here.
The ICE group won prizes at this year’s Thomas Young Centre student day! With his presentation entitled “Role of Structure and Dynamics in Heterogeneous Ice Nucleation: A Tale of Two Brothers?” Martin won the prize for the best talk given amongst 12 shortlisted final-year PhD students in the TYC. For his contribution “A Machine Learning Potential for Graphene” in the exhibition of more than 30 posters Patrick was awarded the prize for the best poster. They were judged by a panel of experts including Andrea Taroni, editor in chief of Nature Physics, Royal Society Fellow Sally Price and TYC representatives Dario Alfè, Michail Stamatakis, Arash Mostofi and Alston Misquitta. Congratulations!
Patrick’s paper has been published in Physical Review B. In collaboration with Gábor Csányi at the University of Cambridge, Patrick developed a Gaussian approximation potential to simulate graphene to the same accuracy as density functional theory but at a computational cost smaller by magnitudes.
The paper is available on the PRB website and our own.
Steve’s paper, in collaboration with Prof. Neal Skipper and BP, has been accepted by the Journal of the American Chemical Society. Using neutron scattering and molecular dynamics simulations, this paper investigates the effect of a variety of impurities on the formation of methane hydrate to gain a better understanding of the process of hydrate nucleation.
The paper can be found here.
Andrea’s and Gerit’s paper has been published in the Proceedings of the National Academy of Sciences of the United States of America. The work had important contributions also from Jiří, a previous member of the ICE group, and from Dario and Alexandre, longstanding Angelos’ collaborators.
In the paper we study molecular crystals with quantum Monte Carlo.
Computational approaches based on the fundamental laws of quantum mechanics are now integral to almost all materials design initiatives in academia and industry. If computational materials science is genuinely going to deliver on its promises, then an electronic structure method with consistently high accuracy is urgently needed. We show that, thanks to recent algorithmic advances and the strategy developed in our manuscript, quantum Monte Carlo yields extremely accurate predictions for the lattice energies of materials at a surprisingly modest computational cost. It is thus no longer a technique that requires a world-leading computational facility to obtain meaningful results. While we focus on molecular crystals, the significance of our findings extends to all classes of materials.