New aspects on the Ir(110) reconstruction: Surface stabilization on mesoscopic scale via (331) facets

Koch, R.; Borbonus, M.; Haase, Oliver; Rieder, K. H.

doi:10.1103/physrevlett.67.3416

Cited by 69 publications

(33 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2͒. [19][20][21] Here we report on a high-temperature STM ͑scanning tunneling microscope͒ study of Ir͑110͒, which finally solves this intricate puzzle. We will show that the originally ͕331͖ faceted surface flattens upon heating to form (1ϫ3)ϩ(1ϫ1) and eventually (1ϫ2) MR reconstructed terraces at about 800 K, thus demonstrating that quenched states have been investigated in the previous room-temperature studies.…”

mentioning

confidence: 83%

Illuminating structural transformation of Ir(110): A high-temperature scanning tunneling microscopy study

2000

Self Cite

View full text Add to dashboard Cite

High-temperature scanning tunneling microscope investigation of Ir͑110͒ reveals that the originally ͕331͖ faceted room-temperature surface flattens upon heating to form (1ϫ3)ϩ(1ϫ1) and eventually (1ϫ2) missing row reconstructed terraces at about 800 K, thus finally resolving a long-standing controversy on its equilibrium configuration. The surprising structural transformations can be explained by a surface stress related mechanism that is consistent also with the reconstruction behavior of the other low index planes of the noble metals.

show abstract

mentioning

confidence: 83%

Illuminating structural transformation of Ir(110): A high-temperature scanning tunneling microscopy study

2000

Self Cite

View full text Add to dashboard Cite

show abstract

“…In Sect. 4 we report on our recent investigation of Ir(110), which was found to choose a surprising novel route to stabilize the configuration of its topmost layers [48].…”

mentioning

confidence: 99%

Reconstruction behaviour of fcc(110) transition metal surfaces and their vicinals

et al. 1992

Self Cite

View full text Add to dashboard Cite

Abstract. The fcc(ll0) surfaces are well known for their strong tendency to missing-row (MR) type reconstructions either in the clean state (Au, Pt) or driven by adsorbates (Ni, Cu, Pd, Ag). The present knowledge on the different reconstruction behaviour of flat (110) surfaces is reviewed. The survey focuses on recent scanning tunneling microscopy (STM) studies, which for the first time also elucidate the dynamics of the reconstruction process for the various systems. An overview of our recent STM and low energy electron diffraction studies on vicinal Au(ll0) and Ni(110) surfaces is given, aiming for a deeper understanding of the influence of steps on reconstruction behaviour of fcc(110) surfaces on the one hand, and on the stability of reconstructing vicinal surfaces on the other. Finally, we report on the reconstruction behaviour of Ir(110), which stabilizes in the clean state by formation of mesoscopic (331) facets and dereconstructs to the (1 x 1) phase upon oxygen adsorption at 700-900 K.

show abstract

“…However, these ion scattering experiments were not able to reveal the nature of the very complex LEED pattern on clean Ir͑110͒ observed by several groups. 25,26 While the pattern was first discussed as some long-range ordering, more recent studies on Ir͑110͒ combining helium atom diffraction, LEED, and STM [29][30][31][32][33][34] found that at room temperature mesoscopic ridges with ͑331͒ facets are present on the Ir͑110͒ surface. Analyzing the STM images it was found that at about 500 K these ͑311͒ facets transform to a reconstructed ͑1 ϫ 3͒-missing-row surface structure interrupted by small ͑1 ϫ 1͒ unreconstructed patches.…”

Section: Introductionmentioning

confidence: 99%

First-principles studies on clean and oxygen-adsorbed Ir(110) surfaces

Kaghazchi

Jacob

2007

Phys. Rev. B

View full text Add to dashboard Cite

Using density functional theory in combination with an ab initio atomistic thermodynamics approach the structure and stability of Ir͑110͒ surfaces in contact with an oxygen atmosphere have been studied. Besides the unreconstructed surface, ͑1 ϫ 2͒-, ͑1 ϫ 3͒-, and ͑1 ϫ 4͒-reconstructed Ir͑110͒ have been considered. We find that without adsorption of oxygen all reconstructed surfaces are more stable than Ir͑110͒-͑1 ϫ 1͒. Adsorption of oxygen with coverages higher than 0.5 ML removes the surface reconstruction, leading to either a c͑2 ϫ 2͒ or p͑2 ϫ 1͒ oxygen overlayer on the unreconstructed Ir͑110͒ surface and therefore an adsorbate-induced lifting of the reconstruction. While on almost all surfaces oxygen prefers binding at bridge positions to Ir atoms of the topmost layer, on the reconstructed surfaces higher coverages are required to additionally stabilize oxygen at adjacent threefold sites. Besides the stability of surface structures, our studies also reveal quantitative information on the geometry and energetics, providing further insights into the sometimes controversial discussion of oxygen adsorption on Ir͑110͒.

show abstract

New aspects on the Ir(110) reconstruction: Surface stabilization on mesoscopic scale via (331) facets

Cited by 69 publications

References 23 publications

Illuminating structural transformation of Ir(110): A high-temperature scanning tunneling microscopy study

Illuminating structural transformation of Ir(110): A high-temperature scanning tunneling microscopy study

Reconstruction behaviour of fcc(110) transition metal surfaces and their vicinals

First-principles studies on clean and oxygen-adsorbed Ir(110) surfaces

Contact Info

Product

Resources

About