Scanning tunneling spectroscopy of epitaxial graphene nanoisland on Ir(111).

Nanoscale Research Letters
Soo-Hyon PharkJürgen Kirschner

Abstract

Scanning tunneling spectroscopy (STS) was used to measure local differential conductance (dI/dV) spectra on nanometer-size graphene islands on an Ir(111) surface. Energy resolved dI/dV maps clearly show a spatial modulation, which we ascribe to a modulated local density of states due to quantum confinement. STS near graphene edges indicates a position dependence of the dI/dV signals, which suggests a reduced density of states near the edges of graphene islands on Ir(111).

References

Dec 15, 1996·Physical Review. B, Condensed Matter·K NakadaM S Dresselhaus
Apr 15, 2006·Science·Claire BergerWalt A de Heer
Aug 16, 2011·Physical Review Letters·Carsten BusseThomas Michely
Sep 29, 2011·ACS Nano·Soo-Hyon PharkJürgen Kirschner
Dec 21, 2011·Physical Review Letters·Sampsa K HämäläinenPeter Liljeroth

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Citations

Oct 13, 2015·Physical Chemistry Chemical Physics : PCCP·Sanpon VantasinYukihiro Ozaki
Aug 10, 2016·Scientific Reports·Beomyong HwangYoung Kuk

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Methods Mentioned

BETA
scanning
scanning tunneling spectroscopy

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