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Periodic spatial variation of the electron-phonon interaction in epitaxial graphene on Ru(0001)
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10.1063/1.4793199
/content/aip/journal/apl/102/6/10.1063/1.4793199
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/6/10.1063/1.4793199
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Figures

Image of FIG. 1.
FIG. 1.

(a) High resolution STM topography of the graphene grown on Ru(0001) (V sample = 1 V; I = 1.5 nA) at 300 mK. (b) Averaged differential conductance as a function of the tip bias voltage measured at the regions A, B, and C marked with arrows in (a). 256 traces measured at each region have been employed to obtain the averaged spectra.

Image of FIG. 2.
FIG. 2.

(a)-(c) Second derivative of the current G −1 · dG/dV as a function of the tip bias voltage built from the numerical differentiation of 256 I/V(V) traces measured at the regions marked by arrows in Figure 1(a) . The averaged G −1 · dG/dV trace is also plotted on top of the 2D histogram (solid blue line). The peaks at ±360 mV indicate an inelastic tunneling process such as the excitation of phonons in the graphene lattice by electron-phonon interaction.

Image of FIG. 3.
FIG. 3.

(a)–(c) 2D histograms of the voltage position and the intensity of the inelastic feature in the IETS spectra. Datapoints sharing the same color have been acquired in the same topographic region. A dashed line passing through the maximum of the 2D histograms has been included to point out that the intensity of the inelastic feature grows from A-regions to C-regions. (d) Comparison between the 1D histograms of the intensity of the IETS measured in regions A, B, and C.

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/content/aip/journal/apl/102/6/10.1063/1.4793199
2013-02-14
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Periodic spatial variation of the electron-phonon interaction in epitaxial graphene on Ru(0001)
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/6/10.1063/1.4793199
10.1063/1.4793199
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