Table 1: Activation energies, prefactors, and calculated rate constants (at 300 K) for the different diffusion pathways.

System Pathway (eV) (Hz) Terrace I-1 A↔B (hop) 0.70 1.91 3.34 I-2 A↔C (hop) 1.39 1.68 7.54 × 10−12 I-3 A↔C (exc) 0.55 1.76 1.02 × 103 Step-edge II-1 A↔B 0.38 1.41 5.83 × 105 II-2 A→C 0.84 1.91 1.48 × 10−2 II-3 C→A 0.66 1.42 1.17 × 101 Kink-site III-1 A→B 0.86 1.75 6.11 × 10−3 III-2 B→A 0.46 1.43 2.69 × 104 III-3 A→C 0.62 1.72 6.63 III-4 C→A 0.35 1.45 1.92 × 106 III-5 C→D 0.80 1.67 6.10 × 10−2 III-6 D→C 0.62 1.42 5.45 Inner-corner IV-1 A→B 0.60 1.70 1.42 × 102 IV-2 B→A 0.34 1.40 2.72 × 106 IV-3 B→C 0.93 1.64 3.91 × 10−4 IV-4 C→B 0.63 1.50 3.93 Outer-corner V-1 A→B 0.75 1.55 3.90 V-2 B→A 0.56 1.48 5.81 × 102 V-3 A→C 0.89 1.80 2.03 × 10−3 V-4 C→A 0.66 1.41 1.15 V-5 A→D 0.49 1.55 9.10 × 103 V-6 D→A 0.47 1.45 1.84 × 104