Phonon mediated tunneling into graphene

Simple item page
dc.creatorWehling, T. O.
dc.creatorGrigorenko, I.
dc.creatorLichtenstein, A. I.
dc.creatorBalatsky, A. V.
dc.date2008-03-31
dc.date.accessioned2026-07-07T10:36:25Z
dc.date.available2026-07-07T10:36:25Z
dc.descriptionRecent scanning tunneling spectroscopy experiments [V. W. Brar et. al., Appl. Phys. Lett. 91, 122102 (2007), Y. Zhang et. al., arXiv:0802.4315 (2008)] on graphene reported an unexpected gap of about $\pm 60$meV around the Fermi level. Here, we give a theoretical investigation explaining the experimentally observed spectra and confirming the phonon mediated tunneling as the reason for the gap: We study the real space properties of the wave functions involved in the tunneling process by means of ab-initio theory and present a model for the electron-phonon interaction, which couples the graphene's Dirac electrons with quasi free electron states at the Brillouin zone center. The self-energy associated with this electron-phonon interaction is calculated and its effects on tunneling into graphene are discussed. In particular, good agreement of the tunneling density of states within our model and the experimental[V. W. Brar et. al., Appl. Phys. Lett. 91, 122102 (2007), Y. Zhang et. al., arXiv:0802.4315 (2008)] dI/dU spectra is found.
dc.description5 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/0803.4427
dc.identifierhttp://arxiv.org/abs/0803.4427
dc.identifierPhys. Rev. Lett. 101, 216803 (2008)
dc.identifierdoi:10.1103/PhysRevLett.101.216803
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/180044
dc.subjectMesoscale and Nanoscale Physics
dc.subjectMaterials Science
dc.titlePhonon mediated tunneling into graphene
dc.typetext

Files

Collections

arXiv