Stephan Haas is a condensed matter theorist with research interests in quantum information theory, quantum magnetism, and unconventional superconductivity. His research group investigates microscopic models of interacting electronic systems, using numerical techniques such as Quantum Monte Carlo to study their phase diagrams, thermodynamics, and excitation spectra. He received his Ph.D. from Florida State University, followed by a postdoc at the Swiss Federal Institute of Technology. He is currently a professor at the University of Southern California.
By doping the topological insulator bismuth selenide with copper to form copper layers, a topological superconductor is created.