Epitaxial films stabilized by long-range forces

by: Zhigang Suo, Zhenyu Zhang

Physical Review B, Vol. 58, No. 8. (1998), 5116.

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Abstract

It has been widely accepted that the stability of an epitaxial film on a substrate of a different material is determined primarily by the competition between surface tension and stress. Here we propose that certain thermodynamic driving forces of different physical origins; acting over longer ranges than atomic length; can be strong enough to compete with elasticity. Specifically; we show that the ubiquitous dispersion force can compete effectively with the stress in thin solid films. We further show that the confined electrons within a metal film can mediate a surprisingly long-ranged force capable of stabilizing metal films of many atomic layers; leading to the existence of a thickness window within which smooth metal films can be formed.

@article{citeulike:763469, abstract = {It has been widely accepted that the stability of an epitaxial film on a substrate of a different material is determined primarily by the competition between surface tension and stress. Here we propose that certain thermodynamic driving forces of different physical origins; acting over longer ranges than atomic length; can be strong enough to compete with elasticity. Specifically; we show that the ubiquitous dispersion force can compete effectively with the stress in thin solid films. We further show that the confined electrons within a metal film can mediate a surprisingly long-ranged force capable of stabilizing metal films of many atomic layers; leading to the existence of a thickness window within which smooth metal films can be formed.}, author = {Suo, Zhigang and Zhang, Zhenyu }, citeulike-article-id = {763469}, doi = {http://dx.doi.org/10.1103/PhysRevB.58.5116}, journal = {Physical Review B}, keywords = {instability, thinfilm}, number = {8}, pages = {5116+}, posted-at = {2006-07-18 21:31:43}, priority = {2}, publisher = {American Physical Society}, title = {Epitaxial films stabilized by long-range forces}, url = {http://dx.doi.org/10.1103/PhysRevB.58.5116}, volume = {58}, year = {1998} }

RIS record

TY - JOUR ID - citeulike:763469 L3 - citeulike-article-id:763469 N2 - It has been widely accepted that the stability of an epitaxial film on a substrate of a different material is determined primarily by the competition between surface tension and stress. Here we propose that certain thermodynamic driving forces of different physical origins; acting over longer ranges than atomic length; can be strong enough to compete with elasticity. Specifically; we show that the ubiquitous dispersion force can compete effectively with the stress in thin solid films. We further show that the confined electrons within a metal film can mediate a surprisingly long-ranged force capable of stabilizing metal films of many atomic layers; leading to the existence of a thickness window within which smooth metal films can be formed. IS - 8 JF - Physical Review B TI - Epitaxial films stabilized by long-range forces PB - American Physical Society VL - 58 SP - 5116 KW - instability KW - thinfilm AU - Suo, Zhigang AU - Zhang, Zhenyu PY - 1998//15/ UR - http://dx.doi.org/10.1103/PhysRevB.58.5116 ER -

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