Surface morphology of laser superheated Pb(111)

Journal Article · Fri May 01 04:00:00 EDT 1998 · Surface Science

DOI:https://doi.org/10.1016/S0039-6028(98)00068-5· OSTI ID:761958

Zhang, Z. H. ^[1]; Lin, Bo; Zeng, X. L.; Elsayed-Ali, H. E.

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1. Program Manager, Old Dominion University

The step density on the vicinal Pb(111) surface after laser superheating and melting is investigated using reflection high-energy electron diffraction. The (00) beam profiles parallel and perpendicular to the incident beam are analyzed. For laser heating with ˜100 ps laser pulses, surface superheating does not significantly change the density of the steps and step edge roughness. A sudden increase in the average terrace width is observed after laser surface melting. The average terrace width and the string length at the step edge become as large as those at room temperature. The average terrace width at 573 K changes from 38±15 to 64±19 Å after laser surface melting, while the average string length at the step edge changes from 50±12 to 250±38 Å.

• Research Organization: Department of Electrical and Computer Engineering, Old Dominion University, Norfolk, VA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: FG05-93ER45505
• OSTI ID: 761958
• Report Number(s): DOE/OR/45505--2
• Journal Information: Surface Science, Journal Name: Surface Science Journal Issue: 2 Vol. 405; ISSN 0039-6028
• Country of Publication: United States
• Language: English