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Probing the electronic transmission across a buried metal/metal interface

Authors :: Paolo Moras
Stefan Blügel
G. Alejandro
P. H. Zhou
Carmelita Carbone
Dinesh Topwal
Luisa Ferrari
Gustav Bihlmayer
Daniel Wortmann
Polina M. Sheverdyaeva
Source :: Physical review. B, Condensed matter and materials physics 82 (2010): 155427-1–155427-6. doi:10.1103/PhysRevB.82.155427, info:cnr-pdr/source/autori:Moras P. (1); Wortmann D. (2); Bihlmayer G. (2); Ferrari L. (3); Alejandro G. (4,5); Zhou P.H. (4); Topwal D. (4); Sheverdyaeva P.M. (1); Blügel S. (2); Carbone C. (1)/titolo:Probing the electronic transmission across a buried metal%2Fmetal interface/doi:10.1103%2FPhysRevB.82.155427/rivista:Physical review. B, Condensed matter and materials physics/anno:2010/pagina_da:155427-1/pagina_a:155427-6/intervallo_pagine:155427-1–155427-6/volume:82, Physical review / B 82(15), 155427 (2010). doi:10.1103/PhysRevB.82.155427
Publication Year :: 2010
Publisher :: American Physical Society (APS), 2010.
Abstract: We monitored the $sp$-quantum-well states of Ag films on Pt(111) by angle-resolved photoemission in order to examine the electron transmission across the Ag/Pt interface. For thin layers up to 3.5 nm, the Ag states are characterized by broad quasiparticle peaks and a reversal of the parabolic curvature near the center of the surface Brillouin zone. Remarkable departures from the expected nearly-free-electronlike band dispersion persist in films of more than 14 nm thickness. First-principles calculations and symmetry analysis demonstrate that the observed anomalies in the spectroscopic data can be straightforwardly linked to variations in the Ag/Pt transmission coefficient in the energy-momentum space.