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• W2048022219 abstract "The results of synchrotron-x-ray-scattering studies of stepped Pt(001) surfaces are reported. An orientational phase diagram is proposed for Pt surfaces between the cubic (001) orientation and orientations tilted 6[degree] away from the [001] direction towards the [110] direction, and for temperatures between 300 and 1850 K. Four distinct orientational phases are identified. At the highest temperatures, we find a one-phase region in which the surface is rough with the local surface normal equal to the macroscopic surface normal. Below [ital T][sub 0]=1820 K, hexagonally reconstructed (001) facets appear in coexistence with the tilted rough phase. The phase boundary of the rough phase decreases with temperature as a quadratic function of the tilt angle away from the [001] direction, consistent with simple theoretical ideas. Below [ital T][sub 1]=1630 K, there are two symmetry-related 2[degree] magic vicinal phases with azimuthal orientations symmetrically rotated away from the cubic [110] direction by [plus minus]4.8[degree]. The 2[degree] magic vicinals are reconstructed, so that the terraces between their constituent steps form a corrugated and rotated quasihexagonal structure. Remarkably, the steps are parallel to the troughs and crests of the corrugation. In addition, the tilt angle appears closely related to the period of the reconstruction, favoring anmore » integer (3 or 4) or half integer (9/2 or 7/2) number of corrugation periods on each terrace between steps, depending on the temperature. Finally, below [ital T][sub 2]=1590 K, we find the 6[degree] magic vicinal phase. Its microscopic structure involves terraces upon which there is one period of the surface corrugation.« less" @default.
• W2048022219 created "2016-06-24" @default.
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• W2048022219 date "1994-06-15" @default.
• W2048022219 modified "2023-10-14" @default.
• W2048022219 title "Faceting and the orientational phase diagram of stepped Pt(001) surfaces" @default.
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• W2048022219 doi "https://doi.org/10.1103/physrevb.49.16702" @default.
• W2048022219 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/10010830" @default.
• W2048022219 hasPublicationYear "1994" @default.
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