Structure and electronic states of vicinal Ag(111) surfaces with densely kinked steps

Ortega, J.E. ; Vasseur, G. ; Piquero-Zulaica, I. ; Matencio, S. ; Valbuena, M.A. ; Rault, J.E. ; Schiller, F. ; Corso, M. ; Mugarza, A. ; Lobo-Checa, J. (Universidad de Zaragoza)

Resumen: Vicinal surfaces exhibiting arrays of atomic steps are frequently investigated due to their diverse physical-chemical properties and their use as growth templates. However, surfaces featuring steps with a large number of low-coordinated kink-atoms have been widely ignored, despite their higher potential for chemistry and catalysis. Here, the equilibrium structure and the electronic states of vicinal Ag(111) surfaces with densely kinked steps are investigated in a systematic way using a curved crystal. With scanning tunneling microscopy we observe an exceptional structural homogeneity of this class of vicinals, reflected in the smooth probability distribution of terrace sizes at all vicinal angles. This allows us to observe, first, a subtle evolution of the terrace-size distribution as a function of the terrace-width that challenges statistical models of step lattices, and second, lattice fluctuations around resonant modes of surface states. As shown in angle resolved photoemission experiments, surface states undergo stronger scattering by fully-kinked step-edges, which triggers the full depletion of the two-dimensional band at surfaces with relatively small vicinal angles.

Idioma: Inglés

DOI: 10.1088/1367-2630/aacbb7

Año: 2018

Publicado en: NEW JOURNAL OF PHYSICS 20, 7 (2018), 073010 [9 pp]
ISSN: 1367-2630

Factor impacto JCR: 3.773 (2018)

Categ. JCR: PHYSICS, MULTIDISCIPLINARY rank: 12 / 81 = 0.148 (2018) - Q1 - T1

Factor impacto SCIMAGO: 1.664 - Physics and Astronomy (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/RASMIA Project
Financiación: info:eu-repo/grantAgreement/EUR/ERDF/EFA194-16TNSI
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2016-78293-C6
Financiación: info:eu-repo/grantAgreement/ES/MINECO/SEV-2013-0295

Tipo y forma: Article (Published version)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)