Thermal Disorder, Fluctuations, Growth and Fragmentation of Finite One-Dimensional Atomic Chains |
| |
Authors: | James M Phillips J G Dash |
| |
Institution: | (1) Department of Physics, University of Missouri, Kansas City, MO 64110, USA;(2) Department of Physics, University of Washington, Seattle, WA 98195-1560, USA |
| |
Abstract: | Ordering in one-dimensional atomic chains is studied using computer simulation. We find that dense ordered chains may exist
if the system is cold enough and not macroscopically long. Growth of finite length chains from the vapor and by vapor exchange
between chains begins rapidly, then slows down exponentially in time. As temperature rises density fluctuations increase,
causing the chains to fragment. Independent of fragmentation, disordering begins at the ends, a condition similar to the precursor
of edge and surface melting in two and three dimensions. The chemical potential of finite ordered chains is a function of
length and temperature, due to the competition between attraction and internal thermal excitation. Equilibrium of chains coexisting
with one-dimensional vapor produces a distribution of sizes, peaked at a temperature dependent chain length. Several results
may be relevant to experimental studies of adsorption on carbon nanotubes |
| |
Keywords: | One-dimensional chains fluctuations growth clusters |
本文献已被 SpringerLink 等数据库收录! |
|