Surface structure and composition of the missing-row reconstruction of VC0.8(1 1 0): A LEED, GIXRD and photoemission studyVisa övriga samt affilieringar
2007 (Engelska)Ingår i: Surface Science, ISSN 0039-6028, E-ISSN 1879-2758, Vol. 601, nr 16, s. 3383-3394Artikel i tidskrift (Refereegranskat) Published
Abstract [en]
Low energy electron diffraction, grazing incidence X-ray diffraction and photoemission were used to decipher the detailed structural arrangement and chemical composition of the surface region of a transition metal carbide, VC0.8(1 1 0). In agreement with previous scanning tunneling microscopy (STM) studies, we find that the surface reconstructs with a ridge-and-valley grating structure along the [1 over(1, ¯) 0] direction resulting from {0 0 1} faceting for the (3 × 1) and the (4 × 1) phases. Both superstructures terminate on the vacuum side with a nearly stoïchiometric VC region due to C segregation, in contrast with the conclusions drawn from this previous STM study. However, the present experiments clearly show that these phases are metastable, and slow cooling results in a (1 × 1) surface, which is highly C depleted, similarly to the (1 0 0) face. © 2007 Elsevier B.V. All rights reserved.
Ort, förlag, år, upplaga, sidor
2007. Vol. 601, nr 16, s. 3383-3394
Nyckelord [en]
Carbide, Low energy electron diffraction, Photoemission, Surface relaxation and reconstruction, Surface segregation, Surface X-ray diffraction, Vacancy, Vanadium
Nationell ämneskategori
Teknik och teknologier
Identifikatorer
URN: urn:nbn:se:liu:diva-48900DOI: 10.1016/j.susc.2007.06.012OAI: oai:DiVA.org:liu-48900DiVA, id: diva2:269796
2009-10-112009-10-112017-12-12