Comment:
Zn1.23/Ag/1.06/Ru(001). 1.23 and 1.06 are coverage of Zn and Ag, respectively. The Ru(001) crystal was cleaned by cycles of oxidation (p = 5E-8 Torr O2, T = 500 K, time = 5 min) and anealing to 1650 K. The temperature of the substrate during the deposition of Ag and Zn was ~350 K.