scholarly journals Non–equilibrium relaxation of an elastic string in random media

2005 ◽  
Vol 131 ◽  
pp. 189-190
Author(s):  
A. B. Kolton ◽  
A. Rosso ◽  
T. Giamarchi
Keyword(s):  
Random Media ◽  
Elastic String ◽  
Non Equilibrium

Critical Beha vior of a Depinning Dislocation

2000 ◽  
Vol 652 ◽  
Author(s):  
Stefano Zapperi ◽  
Michael Zaiser
Keyword(s):  
Stress Field ◽  
Long Range ◽  
Critical Exponents ◽  
Critical Stress ◽  
Threshold Stress ◽  
Random Media ◽  
Analytical Estimate ◽  
Depinning Transition ◽  
Elastic String ◽  
Theoretical Predictions

ABSTRACTThe dynamics of dislocations at yield can be understood within the framew ork of the depinning transition of elastic manifolds in random media. Close to the threshold stress for their long-range motion, the geometry and dynamics of dislocations are characterized by a set of critical exponents. We consider a single flexible dislocation gliding through a random stress field, taking in to account long-range self stresses, and estimate the critical stress where depinning takes place. Simulations of a discretized lattice model confirm the analytical estimate and yield numerical values of the critical exponents which are in agreement with theoretical predictions for an elastic string mo ving on a plane.

Application of analytical electron microscopy to studies of equilibrium and non-equilibrium segregation in materials

1992 ◽  
Vol 50 (2) ◽  
pp. 1214-1215
Author(s):  
Edward A Kenik
Keyword(s):  
Electron Microscopy ◽  
Analytical Electron Microscopy ◽  
Extended Defects ◽  
Probe Diameter ◽  
Specimen Holder ◽  
Analytical Electron ◽  
Scanning Transmission ◽  
Solute Atoms ◽  
Equilibrium Segregation ◽  
Non Equilibrium

Segregation of solute atoms to grain boundaries, dislocations, and other extended defects can occur under thermal equilibrium or non-equilibrium conditions, such as quenching, irradiation, or precipitation. Generally, equilibrium segregation is narrow (near monolayer coverage at planar defects), whereas non-equilibrium segregation exhibits profiles of larger spatial extent, associated with diffusion of point defects or solute atoms. Analytical electron microscopy provides tools both to measure the segregation and to characterize the defect at which the segregation occurs. This is especially true of instruments that can achieve fine (<2 nm width), high current probes and as such, provide high spatial resolution analysis and characterization capability. Analysis was performed in a Philips EM400T/FEG operated in the scanning transmission mode with a probe diameter of <2 nm (FWTM). The instrument is equipped with EDAX 9100/70 energy dispersive X-ray spectrometry (EDXS) and Gatan 666 parallel detection electron energy loss spectrometry (PEELS) systems. A double-tilt, liquid-nitrogen-cooled specimen holder was employed for microanalysis in order to minimize contamination under the focussed spot.

Equilibrium and Non-Equilibrium Statistical Thermodynamics

2004 ◽  
Author(s):  
Michel Le Bellac ◽  
Fabrice Mortessagne ◽  
G. George Batrouni
Keyword(s):  
Statistical Thermodynamics ◽  
Non Equilibrium

Random media with temperature controlled connectivity

1992 ◽  
Vol 2 (5) ◽  
pp. 503-510 ◽  
Author(s):  
F. Carmona ◽  
E. Valot ◽  
L. Servant ◽  
M. Ricci
Keyword(s):  
Random Media ◽  
Temperature Controlled

BULK NON-EQUILIBRIUM SUPERCONDUCTOR PROBED BY BALLISTIC PHONONS

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-541-C6-542
Author(s):  
B. Pannetier ◽  
J. P. Maneval
Keyword(s):  
Ballistic Phonons ◽  
Non Equilibrium

NON-EQUILIBRIUM PHENOMENA IN SUPERCONDUCTING MICROBRIDGES

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-500-C6-502 ◽  
Author(s):  
J. Bindslev Hansen ◽  
P. Jespersen ◽  
P. E. Lindelof
Keyword(s):  
Non Equilibrium
Sign in / Sign up

Export Citation Format

Share Document