Surface science letter
The (2 × 2) p2mg to (1 × 2) O/Rh(110) phase transition

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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.

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Cited by (0)

1

Permanent address: Institute J. Stefan, Ljubljana, Slovenia. Present address: Sincrotrone Trieste S.C.p.A., Padriciano 99, 34012 Trieste, Italy

2

Permanent address: Università di Trieste, 34000 Trieste, Italy

3

Permanent address: Università di Trento, Povo, Italy

4

Also at: Dipartimento di Fisica dell' Università di Trieste, Trieste, Italy

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