Sun, 27 Jul 2008 07:40:02 BST CiteULike: dchen's Bai http://www.citeulike.org/user/dchen/author/Bai CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dchen/article/3040970 <i>Applied Physics Letters, Vol. 82, No. 26. (2003), pp. 4806-4808.</i><br /><br />View This Record in Scopus Dual-mode mechanical resonance of individual ZnO nanobelts XD Bai PX Gao ZL Wang EG Wang Applied Physics Letters, Vol. 82, No. 26. (2003), pp. 4806-4808. 2008-07-24T18:38:23-00:00 2003 Applied Physics Letters 82 26 4806 4808 AIP atlanta elasticity gt modulus nano technique http://www.citeulike.org/user/dchen/article/2749189 <i>Physical Review B (Condensed Matter and Materials Physics), Vol. 77, No. 13. (2008)</i><br /><br />Homogeneous melting in the superheating regime is investigated by using molecular dynamics simulation of a Lennard-Jones model system. We show that the commonly observed catastrophic melting at the superheating limit is caused by fast heating rate. By keeping the system isothermally at temperatures below the superheating limit, we observe intense self-diffusion motions as the precursor of melting. The highly correlated atomic motions are related to the self-diffusion loops or rings. Two types of loops are observed, closed loop and open loop, where the latter is directly related to the homogeneous nucleation of the liquid phase. Homogeneous melting occurs when the number density of diffusion loops reaches a critical value. Our results suggest that homogeneous melting in the superheating regime is a first-order thermodynamic phase transition triggered by the self-diffusion loops when the kinetic constraint imposed by heating rate is lessened. Ring-diffusion mediated homogeneous melting in the superheating regime Xian Bai Mo Li doi:10.1103/PhysRevB.77.134109 Physical Review B (Condensed Matter and Materials Physics), Vol. 77, No. 13. (2008) 2008-05-03T15:47:24-00:00 2008 Physical Review B (Condensed Matter and Materials Physics) 77 13 APS 2008 cooperative crystal dynamics focus simulation transition