Confinement and edge effects on atomic collapse in graphene nanoribbons

Graphene nanoribbons and edge reconstructions

Stability of edge states and edge magnetism in graphene nanoribbons

Jens Kunstmann,1,* Cem Özdoğan,2 Alexander Quandt,3,4 and Holger Fehske3 1Institute for Materials Science, TU Dresden, Hallwachstr. 3, D-01069 Dresden, Germany 2Department of Materials Science and Engineering, Çankaya University, Balgat, TR-06530 Ankara, Turkey 3Institut für Physik der Universität Greifswald, Felix–Hausdorff-Str. 6, D-17489 Greifswald, Germany 4School of Physics and DST/NRF Cen...

Edge magnetotransport fingerprints in disordered graphene nanoribbons

Jean-Marie Poumirol,1 Alessandro Cresti,2,* Stephan Roche,3,4 Walter Escoffier,1 Michel Goiran,1 Xinran Wang,5 Xiaolin Li,5 Hongjie Dai,5 and Bertrand Raquet1 1Laboratoire National des Champs Magnétiques Intenses, INSA UPS CNRS, UPR 3228, Université de Toulouse, 143 avenue de Rangueil, 31400 Toulouse, France 2LETI, MINATEC, CEA, F38054 Grenoble, France 3INAC, SP2M, Lsim, CEA, 17 avenue des Mart...

Correlating Atomic Structure and Transport in Suspended Graphene Nanoribbons

Graphene nanoribbons (GNRs) are promising candidates for next generation integrated circuit (IC) components; this fact motivates exploration of the relationship between crystallographic structure and transport of graphene patterned at IC-relevant length scales (<10 nm). We report on the controlled fabrication of pristine, freestanding GNRs with widths as small as 0.7 nm, paired with simultaneou...

Observing atomic collapse resonances in artificial nuclei on graphene.

Relativistic quantum mechanics predicts that when the charge of a superheavy atomic nucleus surpasses a certain threshold, the resulting strong Coulomb field causes an unusual atomic collapse state; this state exhibits an electron wave function component that falls toward the nucleus, as well as a positron component that escapes to infinity. In graphene, where charge carriers behave as massless...