IAFE 05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
artículos
Título:
Anomalous KCl(001) Surface Corrugation from Fast He Diffraction at Very Grazing Incidence
Autor/es:
BREISS, H.; CASAGRANDE, E M STAICU; KHEMLICHE, H.; SZILASI, S.; GRAVIELLE, M.S.; BOCAN, G.A.; MOMENI, A.; SÁNCHEZ, E.A.; BREISS, H.; CASAGRANDE, E M STAICU; KHEMLICHE, H.; SZILASI, S.; GRAVIELLE, M.S.; BOCAN, G.A.; MOMENI, A.; SÁNCHEZ, E.A.
Revista:
PHYSICAL REVIEW LETTERS
Editorial:
The American Physical Society
Referencias:
Lugar: New York; Año: 2020 vol. 125 p. 96101 - 96105
ISSN:
0031-9007
Resumen:
We present theoretical and experimental evidence of an anomalous surface corrugation behavior in He-KCl(001) for incidence along ⟨110⟩. When the He normal energy decreases below 100 meV, i.e., He-surface distances Z>2 Å, the corrugation unexpectedly increases up to an impressive ≳85%. This is not due to van der Waals interactions but to the combination of soft potential effects and the evolution of He-cation and He-anion interactions with Z. This feature, not previously analyzed on alkali-halide surfaces, may favor the alignment properties of weakly interacting overlayers.
