It is with great emotion that the management and staff of the BSMI have learned of the death of Guy Allan.

Guy Allan died on 29 April 2022 at the age of 79.

Engineer of the Institut Supérieur d'Electronique du Nord (class of 1964), disciple of Jacques Friedel's school in condensed matter physics, he had a rich and long career as a researcher at the CNRS, in the Surfaces and Interfaces Laboratory, which became in 1992 one of the components of the Institute of Electronics, Microelectronics and Nanotechnology (Villeneuve d'Ascq)

Guy Allan was not only in France but also internationally one of the pioneers of electronic structure calculations by numerical simulations of quantum mechanics.

He has made highly visible contributions to the description of transition metal surfaces and interfaces, defects in metals and semiconductors, and semiconductor nanocrystals.

Combining scientific culture and exceptional alertness with human qualities appreciated by all, Guy Allan will long be remembered by the many students, colleagues and friends who worked with him.