Volume 78, Number 4, May 2007
Article Number 46003
Number of page(s) 4
Section Condensed Matter: Structural, Mechanical and Thermal Properties
Published online 03 May 2007
EPL, 78 (2007) 46003
DOI: 10.1209/0295-5075/78/46003

Theory of the amorphous solid state: Non-directional elastic vortices and a superhard crystal state

P. Tolédano

Department of Physics, Faculty of Sciences, University of Picardie - 80000 Amiens, France

received 20 March 2007; accepted in final form 4 April 2007; published May 2007
published online 3 May 2007

A theory of the amorphous solid state is proposed describing the internal forces which stabilize an amorphous structure and condition the amorphization process. It shows that the amorphous state constitutes the elastic analog of the mixed state of type-II superconductors, its stability being due to an internal stress field which compensates the local distortions of the structure and creates a stationary dislocation flux. The equations of state of amorphous solids are established, and remarkable effects are predicted such as the formation of non-directional elastic vortices in the amorphous state, and a critical applied stress above which the amorphous state transforms into a superhard crystal state.

61.50.Ks - Crystallographic aspects of phase transformations; pressure effects .
64.70.Pf - Glass transitions .
61.43.Er - Other amorphous solids .

© Europhysics Letters Association 2007