Skip to main content
. 2020 Jan 14;11:278. doi: 10.1038/s41467-019-14064-7

Fig. 2. Dephasing rates α(ΔK) as determined from measurements of I(ΔK,t).

Fig. 2

a Arrhenius plot showing the temperature dependence at two different momentum transfers along the ΓM¯-azimuth for the diffusion of water on Bi2Te3(111). The measurements were taken at an H2O coverage of 0.05 ML. b Momentum transfer dependence for the diffusion of H2O on Bi2Te3(111) at a fixed temperature. The measurements were taken at a constant surface temperature of TS=150K and a water coverage of 0.05 ML (blue circles) and 0.08 ML (red triangles), respectively. The dash-dotted line corresponds to the analytic model for jump-diffusion with jumps on a hexagonal lattice to nearest and next-nearest sites as illustrated in the small inset. The red and yellow circles illustrate the jump distance to the next and next nearest sites, respectively. The extracted barriers Ea and pre-exponential factors α0 for two different momentum transfers ΔK as well as the pre-exponential hopping rate Γ0 for the diffusion process at 150 K are given in Table 1. The error bars correspond to the confidence bounds (1σ) upon determination of α(ΔK) from the measurements of I(ΔK,t)—see text.