My research career has been mainly devoted to the study of the properties of materials by means of computational methods. Computational Materials Science has emerged in recent years as a very useful complement to the traditional "experimental" and "theoretical" approaches. Since we know the basic laws that rule the behavior of the constituents of matter, we have the "ultimate" model of the properties of materials, and can perform "computer experiments", which are extremely useful to: a) complement experimental work in those cases in which it is difficult (e.g. materials at the Earth's core), or too time-consuming or impractical (e.g. exploration of different compositions and structures in search of optimal properties); b) analyze systems under perfectly controlled conditions (e.g. study the properties of an isolated defect); and c) extract realistic values for the parameters of simpler models (e.g. an "Ising model" of the magnetic properties of a material).
I am part of the SIESTA project, being involved in all aspects of the code and in its application to a wide variety of problems, from solid-state chemistry to the bonding of molecules on surfaces.