title: Slow plastic creep of 2D dusty plasma solids.
abstract: We report complex plasma experiments, assisted by numerical simulations, providing an alternative qualitative link between the macroscopic response of polycrystalline solid matter to small shearing forces and the possible underlying microscopic processes. In the stationary creep regime we have determined the exponents of the shear rate dependence of the shear stress and defect density, being α=1.15±0.1 and β=2.4±0.4, respectively. We show that the formation and rapid glide motion of dislocation pairs in the lattice are dominant processes.
authors: Institute for Solid State Physics and Optics, Wigner Research Centre, Hungarian Academy of Sciences, P.O.Box. 49, H-1525 Budapest, Hungary and Center for Astrophysics, Space Physics and Engineering Research (CASPER), One Bear Place 97310, Baylor University, Waco, Texas 76798, USA.
authors: Peter
authors: P
authors: Hartmann
authors: Institute for Solid State Physics and Optics, Wigner Research Centre, Hungarian Academy of Sciences, P.O.Box. 49, H-1525 Budapest, Hungary.
authors: Anikó Zs
authors: AZ
authors: Kovács
authors: Ouachita Baptist University, 410 Ouachita Street, Arkadelphia, Arkansas 71923, USA.
authors: Angela M
authors: AM
authors: Douglass
authors: Center for Astrophysics, Space Physics and Engineering Research (CASPER), One Bear Place 97310, Baylor University, Waco, Texas 76798, USA.
authors: Jorge C
authors: JC
authors: Reyes
authors: Center for Astrophysics, Space Physics and Engineering Research (CASPER), One Bear Place 97310, Baylor University, Waco, Texas 76798, USA.
authors: Lorin S
authors: LS
authors: Matthews
authors: Center for Astrophysics, Space Physics and Engineering Research (CASPER), One Bear Place 97310, Baylor University, Waco, Texas 76798, USA.
authors: Truell W
authors: TW
authors: Hyde