Two Dimensional Phase Separation for Co Adsorbed on Si(111)

R. J. Phaneuf; Y. Hong; S. Horch; Peter Bennett

doi:10.1103/PhysRevLett.78.4605

Two Dimensional Phase Separation for Co Adsorbed on Si(111)

R. J. Phaneuf, Y. Hong, S. Horch, Peter Bennett

Physics

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

We have used low energy electron microscopy to monitor the high-temperature behavior of surface phases in the Co/Si(111) system at submonolayer coverages. We observe a reversible phase separation from a disordered “(1×1)” phase to well-defined coexisting regions of ordered (7×7)-reconstructed and disordered phases. The transition temperature is depressed by nearly 200°C by the addition of 0.1 monolayer of cobalt. The shape of the coverage-temperature phase boundary allows us to estimate the latent heat of the (7×7) order-disorder transition.

Original language	English (US)
Pages (from-to)	4605-4608
Number of pages	4
Journal	Physical Review Letters
Volume	78
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevLett.78.4605
State	Published - Jun 16 1997

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General Physics and Astronomy

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10.1103/PhysRevLett.78.4605

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abstract = "We have used low energy electron microscopy to monitor the high-temperature behavior of surface phases in the Co/Si(111) system at submonolayer coverages. We observe a reversible phase separation from a disordered “(1×1)” phase to well-defined coexisting regions of ordered (7×7)-reconstructed and disordered phases. The transition temperature is depressed by nearly 200°C by the addition of 0.1 monolayer of cobalt. The shape of the coverage-temperature phase boundary allows us to estimate the latent heat of the (7×7) order-disorder transition.",

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AU - Hong, Y.

AU - Horch, S.

AU - Bennett, Peter

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Y1 - 1997/6/16

N2 - We have used low energy electron microscopy to monitor the high-temperature behavior of surface phases in the Co/Si(111) system at submonolayer coverages. We observe a reversible phase separation from a disordered “(1×1)” phase to well-defined coexisting regions of ordered (7×7)-reconstructed and disordered phases. The transition temperature is depressed by nearly 200°C by the addition of 0.1 monolayer of cobalt. The shape of the coverage-temperature phase boundary allows us to estimate the latent heat of the (7×7) order-disorder transition.

AB - We have used low energy electron microscopy to monitor the high-temperature behavior of surface phases in the Co/Si(111) system at submonolayer coverages. We observe a reversible phase separation from a disordered “(1×1)” phase to well-defined coexisting regions of ordered (7×7)-reconstructed and disordered phases. The transition temperature is depressed by nearly 200°C by the addition of 0.1 monolayer of cobalt. The shape of the coverage-temperature phase boundary allows us to estimate the latent heat of the (7×7) order-disorder transition.

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JO - Physical Review Letters

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Two Dimensional Phase Separation for Co Adsorbed on Si(111)

Abstract

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