TY - JOUR T1 - Two- and One-Dimensional Honeycomb Structures of Silicon and Germanium A1 - Cahangirov, S. A1 - Topsakal, M. A1 - Akturk, E. A1 - Sahin, H. A1 - Ciraci, S. JA - Physical Review Letters Y1 - 2009 VL - 102 SP - 236804-1 EP - 4 ER -