Adsorption of half a monolayer of oxygen on the Rh(110) substrate gives a surface with a (2 × 2) p2mg symmetry structure, in which the substrate has a missing row (1 × 2) structure. He-beam scattering measurements show that close to 750 K this surface structure reversibly transforms into a phase of (1 × 2) symmetry. The phase transition has been classified as belonging to the order-disorder type, and falls into the 2D Ising universality class. Above the transition temperature proliferation of antiphase domain boundaries along the [001] direction is observed and discussed.
The (2 × 2) p2mg to phase transition
MORGANTE, ALBERTO;TOMMASINI, FERNANDO;
1993-01-01
Abstract
Adsorption of half a monolayer of oxygen on the Rh(110) substrate gives a surface with a (2 × 2) p2mg symmetry structure, in which the substrate has a missing row (1 × 2) structure. He-beam scattering measurements show that close to 750 K this surface structure reversibly transforms into a phase of (1 × 2) symmetry. The phase transition has been classified as belonging to the order-disorder type, and falls into the 2D Ising universality class. Above the transition temperature proliferation of antiphase domain boundaries along the [001] direction is observed and discussed.File in questo prodotto:
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