Transverse discrete breathers in unstrained graphene Elham Barani, Ivan P. Lobzenko, Elena A. Korznikova, Elvira G. Soboleva, Sergey V. Dmitriev, Kun Zhou and Aliakbar Moradi Marjaneh Eur. Phys. J. B, 90 3 (2017) 38 Published online: 01 March 2017 DOI: 10.1140/epjb/e2017-70751-2