Zobrazeno 1 - 10
of 539
pro vyhledávání: '"C J Olson"'
Autor:
C Reichhardt, C J Olson Reichhardt
Publikováno v:
New Journal of Physics, Vol 18, Iss 9, p 095005 (2016)
Using a particle-based simulation model, we show that quenched disorder creates a drive-dependent skyrmion Hall effect as measured by the change in the ratio $R={V}_{\perp }/{V}_{| | }$ of the skyrmion velocity perpendicular ( V _⊥ ) and parallel (
Externí odkaz:
https://doaj.org/article/30f94b456a114af393aa2277b81612f9
Publikováno v:
New Journal of Physics, Vol 17, Iss 10, p 103010 (2015)
We examine square and kagome artificial spin ice for colloids confined in arrays of double-well traps. Unlike magnetic artificial spin ices, colloidal and vortex artificial spin ice realizations allow creation of doping sites through double occupatio
Externí odkaz:
https://doaj.org/article/81463952c7664ae5bcc0de9d656c1f0a
Publikováno v:
New Journal of Physics, Vol 17, Iss 7, p 073034 (2015)
We show using numerical simulations that pronounced ratchet effects can occur for ac driven skyrmions moving over asymmetric quasi-one-dimensional substrates. We find a new type of ratchet effect called a Magnus-induced transverse ratchet that arises
Externí odkaz:
https://doaj.org/article/ae77d65612fc456f9e82c3413156dba0
Publikováno v:
New Journal of Physics, Vol 16, Iss 6, p 063051 (2014)
We show that both square and kagome artificial spin ice systems exhibit disorder-induced nonequilibrium phase transitions, with power law avalanche distributions at the critical disorder level. The different nature of geometrical frustration in the t
Externí odkaz:
https://doaj.org/article/2d537655abca4929b98d47c47d17bc83
Publikováno v:
Phys. Rev. E 95, 030902 (2017)
We numerically examine clogging transitions for bidisperse disks flowing through a two dimensional periodic obstacle array. We show that clogging is a probabilistic event that occurs through a transition from a homogeneous flowing state to a heteroge
Externí odkaz:
http://arxiv.org/abs/1612.03123
Publikováno v:
Phys. Rev. B 96, 094516 (2017)
Disordered hyperuniformity is a state of matter which has isotropic liquid like properties while simultaneously having crystalline like properties such as little variation in the density fluctuations over long distances. Such states arise for the pac
Externí odkaz:
http://arxiv.org/abs/1611.01532
Publikováno v:
Phys. Rev. E 95, 012607 (2017)
We numerically examine the transport of an assembly of active run-and-tumble disks interacting with a traveling wave substrate. We show that as a function of substrate strength, wave speed, disk activity, and disk density, a variety of dynamical phas
Externí odkaz:
http://arxiv.org/abs/1611.00349
Publikováno v:
Phys. Rev. E 95, 032606 (2017)
Depinning and nonequilibrium transitions within sliding states in systems driven over quenched disorder arise across a wide spectrum of size scales ranging from atomic friction at the nanoscale, flux motion in type-II superconductors at the mesoscale
Externí odkaz:
http://arxiv.org/abs/1610.07631
Publikováno v:
Phys. Rev. B 95, 104401 (2017)
We show that ac driven skyrmions interacting with an asymmetric substrate provide a realization of a new class of ratchet system which we call a vector ratchet that arises due to the effect of the Magnus term on the skyrmion dynamics. In a vector rat
Externí odkaz:
http://arxiv.org/abs/1609.08206
Publikováno v:
Sci. Rep. 7, 651 (2017)
We demonstrate the use of an external field to stabilize and control defect lines connecting topological monopoles in spin ice. For definiteness we perform Brownian dynamics simulations with realistic units mimicking experimentally realized artificia
Externí odkaz:
http://arxiv.org/abs/1609.02129