We were deeply saddened by the news of Professor Stefan Müller having passed away. Stefan was a scientist, a leader, and a friend.
In a life of many achievements, Stefan made major contributions to the development and application of multi-scale modeling techniques based on density functional theory and statistical physics enabling detailed studies of materials properties and processes over a large range of time and length scales. One of his many accomplishments was to pursue with dedication the cluster expansion methodology, generalizing it, and making it applicable to a large variety of materials problems. In tight cooperation with Professor Gus Hart, Stefan developed the UNiversal CLuster Expansion (UNCLE) code and made the program package available, enabling widespread application of the technique in solid state and materials research. UNCLE will continue to be actively supported and developed by the team of experts that Stefan helped to create.
Stefan will always be remembered for his many outstanding scientific contributions, and achievements, as well as for his joyful and sociable approach to life. He will be greatly missed by his colleagues at Materials Design. We convey our condolences to his family, friends, and colleagues.
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