期刊
PHYSICAL REVIEW LETTERS
卷 101, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.017802
关键词
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资金
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [851597] Funding Source: National Science Foundation
When an ultrathin metal film of thickness h (< 20 nm) is melted by a nanosecond pulsed laser, the film temperature is a nonmonotonic function of h and achieves its maximum at a certain thickness h(*). This is a consequence of the h and time dependence of energy absorption and heat flow. Linear stability analysis and nonlinear dynamical simulations that incorporate such intrinsic interfacial thermal gradients predict a characteristic pattern length scale Lambda that decreases for h > h*, in contrast to the classical spinodal dewetting behavior where Lambda increases monotonically as h(2). These predictions agree well with experimental observations for Co and Fe films on SiO2.
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