Many-Body Quantum Monte Carlo Study of 2 D Materials : Cohesion and Band Gap in Single-Layer

T. Frank, R. Derian, K. Tokár, L. Mitas, J. Fabian, and I. Štich Institute for Theoretical Physics, University of Regensburg, 93040 Regensburg, Germany Center for Computational Materials Science, Institute of Physics, Slovak Academy of Sciences, 84511 Bratislava, Slovakia Department of Physics, North Carolina State University, Raleigh, North Carolina 27695-8202, USA Institute of Informatics, Slovak Academy of Sciences, 845 07 Bratislava, Slovakia and Department of Natural Sciences, University of Saints Cyril and Methodius, 917 01 Trnava, Slovakia