Trapping surface electrons on graphene layers and islands

Niesner D, Fauster T, Dadap JI, Zaki N, Knox KR, Yeh PC, Bhandari R, Osgood RM, Petrovic M, Kralj M (2012)

Publication Status: Published

Publication Type: Journal article

Publication year: 2012

Journal

Physical Review B American Physical Society

Publisher: American Physical Society

Book Volume: 85

Article Number: 081402

DOI: 10.1103/PhysRevB.85.081402

Abstract

We report the use of time-and angle-resolved two-photon photoemission to map the bound, unoccupied electronic structure of the weakly coupled graphene/Ir(111) system. The energy, dispersion, and lifetime of the lowest three image-potential states are measured. In addition, the weak interaction between Ir and graphene permits observation of resonant transitions from an unquenched Shockley-type surface state of the Ir substrate to graphene/Ir image-potential states. The image-potential-state lifetimes are comparable to those of midgap clean metal surfaces. Evidence of localization of the excited electrons on single-atom-layer graphene islands is provided by coverage-dependent measurements.

Authors with CRIS profile

Daniel Niesner Lehrstuhl für Festkörperphysik Thomas Fauster Lehrstuhl für Festkörperphysik

Involved external institutions

Columbia University US United States (USA) (US) Institut za fiziku / Institute of Physics HR Croatia (HR)

How to cite

APA:

Niesner, D., Fauster, T., Dadap, J.I., Zaki, N., Knox, K.R., Yeh, P.-C.,... Kralj, M. (2012). Trapping surface electrons on graphene layers and islands. Physical Review B, 85. https://doi.org/10.1103/PhysRevB.85.081402

MLA:

Niesner, Daniel, et al. "Trapping surface electrons on graphene layers and islands." Physical Review B 85 (2012).

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