The deposition of 1 / 3 Pb monolayer at room temperature onto Ag͑111͒ leads to a ͑ ͱ 3 ϫ ͱ 3͒R30°superstructure. We present here a detailed structural study of this surface structure by synchrotron radiation surface x ray diffraction ͑SR-SXRD͒ and scanning tunnel microscopy ͑STM͒. We show that Pb atoms are embedded into the silver top surface layer forming an ordered Ag 2 Pb surface alloy despite the strong tendency of the system to phase separate in the bulk. Quenched molecular dynamics simulations allow us to interpret this ordering reversal, in terms of size-mismatch induced surface alloying.
Abstract. Rotational-translational addition theorems for the scalar spheroidal wave function ^\(h; r],£, (f>), with / = 1,3,4, are deduced. This permits one to represent the mnth scalar spheroidal wave function, associated with one spheroidal coordinate system (hq\ rjq, $q,q), centered at its local origin Oq, by an addition series of spheroidal wave functions associated with a second rotated and translated system (hr; Tjr, ^r,r), centered at Or. Such theorems are necessary in the rigorous analysis of radiation and scattering by spheroids with arbitrary spacings and orientations. ','7, due to Dalmas and Deleuil [6, Sec. 2;7], These theorems have found application in the problem of electromagnetic scattering of a plane wave from a pair of perfectly conducting prolate spheroids whose major axes are in parallel alignment [6,8,9]. Moreover, very thin conducting spheroids can be used to model thin-wire dipole antennas, and translational addition
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.