New Phases of Germanene
Ozcelik, V. O.
Journal of Physical Chemistry Letters
American Chemical Society
Özçelik, V. O., Durgun, E., & Ciraci, S. (2014). New phases of germanene. The journal of physical chemistry letters, 5(15), 2694-2699.
Please cite this item using this persistent URLhttp://hdl.handle.net/11693/12461
Germanene, a graphene-like single-layer structure of Ge, has been shown to be stable and recently grown on Pt and Au substrates. We show that a Ge adatom adsorbed on germanene pushes down the host Ge atom underneath and forms a dumbbell structure. This exothermic process occurs spontaneously. The attractive dumbbell-dumbbell interaction favors high coverage of dumbbells. This Letter heralds stable new phases of germanene, which are constructed from periodically repeating coverage of dumbbell structures and display diversity of electronic and magnetic properties.