Morphological evolution of ion-sputtered Pd(001): Temperature effects
- Authors
- Kim, TC; Jo, MH; Kim, Y; Noh, DY; Kahng, B; Kim, JS
- Issue Date
- Mar-2006
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW B, v.73, no.12
- Journal Title
- PHYSICAL REVIEW B
- Volume
- 73
- Number
- 12
- URI
- https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/15172
- DOI
- 10.1103/PhysRevB.73.125425
- ISSN
- 2469-9950
2469-9969
- Abstract
- We have investigated the kinetic effects on the morphological evolution of an Ar+-ion sputtered Pd(001) by in situ, real-time x-ray reflectivity and grazing-incidence small angle x-ray scattering measurements at various substrate temperatures. We find that surface roughness W and its associated growth exponent beta increase with T up to a certain temperature T-m. Beyond T-m, however, they decrease with increasing T. For T < T-m, surface roughening and coarsening kinetics are mostly driven by the deposition and diffusion of sputter-induced adatoms as reported in molecular beam epitaxial growth. When T is near T-m, however, vacancies rather than adatoms become the dominant surface species. Above T-m, the surface smoothing via adatom detachment and vacancy diffusion across step edges becomes effective.
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