Criticality of relaxation in dislocation systems

Péter Dusán Ispánovity, I. Groma, G. Györgyi, Péter Szabó, Wolfgang Hoffelner

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Relaxation processes of dislocation systems are studied by two-dimensional dynamical simulations. In order to capture generic features, three physically different scenarios were studied and power-law decays found for various physical quantities. Our main finding is that all these are the consequence of the underlying scaling property of the dislocation velocity distribution. Scaling is found to break down at some cutoff time increasing with system size. The absence of intrinsic relaxation time indicates that criticality is ubiquitous in all states studied. These features are reminiscent of glassy systems and can be attributed to the inherent quenched disorder in the position of the slip planes.

Original languageEnglish
Article number085506
JournalPhysical Review Letters
Volume107
Issue number8
DOIs
Publication statusPublished - Aug 16 2011

Fingerprint

scaling
slip
cut-off
velocity distribution
breakdown
relaxation time
disorders
decay
simulation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Criticality of relaxation in dislocation systems. / Ispánovity, Péter Dusán; Groma, I.; Györgyi, G.; Szabó, Péter; Hoffelner, Wolfgang.

In: Physical Review Letters, Vol. 107, No. 8, 085506, 16.08.2011.

Research output: Contribution to journalArticle

Ispánovity, Péter Dusán ; Groma, I. ; Györgyi, G. ; Szabó, Péter ; Hoffelner, Wolfgang. / Criticality of relaxation in dislocation systems. In: Physical Review Letters. 2011 ; Vol. 107, No. 8.
@article{a8d144c310fe478ab155d171319e6e1a,
title = "Criticality of relaxation in dislocation systems",
abstract = "Relaxation processes of dislocation systems are studied by two-dimensional dynamical simulations. In order to capture generic features, three physically different scenarios were studied and power-law decays found for various physical quantities. Our main finding is that all these are the consequence of the underlying scaling property of the dislocation velocity distribution. Scaling is found to break down at some cutoff time increasing with system size. The absence of intrinsic relaxation time indicates that criticality is ubiquitous in all states studied. These features are reminiscent of glassy systems and can be attributed to the inherent quenched disorder in the position of the slip planes.",
author = "Isp{\'a}novity, {P{\'e}ter Dus{\'a}n} and I. Groma and G. Gy{\"o}rgyi and P{\'e}ter Szab{\'o} and Wolfgang Hoffelner",
year = "2011",
month = "8",
day = "16",
doi = "10.1103/PhysRevLett.107.085506",
language = "English",
volume = "107",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "8",

}

TY - JOUR

T1 - Criticality of relaxation in dislocation systems

AU - Ispánovity, Péter Dusán

AU - Groma, I.

AU - Györgyi, G.

AU - Szabó, Péter

AU - Hoffelner, Wolfgang

PY - 2011/8/16

Y1 - 2011/8/16

N2 - Relaxation processes of dislocation systems are studied by two-dimensional dynamical simulations. In order to capture generic features, three physically different scenarios were studied and power-law decays found for various physical quantities. Our main finding is that all these are the consequence of the underlying scaling property of the dislocation velocity distribution. Scaling is found to break down at some cutoff time increasing with system size. The absence of intrinsic relaxation time indicates that criticality is ubiquitous in all states studied. These features are reminiscent of glassy systems and can be attributed to the inherent quenched disorder in the position of the slip planes.

AB - Relaxation processes of dislocation systems are studied by two-dimensional dynamical simulations. In order to capture generic features, three physically different scenarios were studied and power-law decays found for various physical quantities. Our main finding is that all these are the consequence of the underlying scaling property of the dislocation velocity distribution. Scaling is found to break down at some cutoff time increasing with system size. The absence of intrinsic relaxation time indicates that criticality is ubiquitous in all states studied. These features are reminiscent of glassy systems and can be attributed to the inherent quenched disorder in the position of the slip planes.

UR - http://www.scopus.com/inward/record.url?scp=84856681227&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84856681227&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.107.085506

DO - 10.1103/PhysRevLett.107.085506

M3 - Article

VL - 107

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 8

M1 - 085506

ER -