Zobrazeno 1 - 10
of 159
pro vyhledávání: '"C. J. Olson Reichhardt"'
Publikováno v:
Scientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
Abstract 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
Externí odkaz:
https://doaj.org/article/9694b18a4d4c4d40987e7caad5f60980
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:
Annual Review of Condensed Matter Physics. 8:51-75
Ratchet effects can arise for single or collectively interacting Brownian particles on an asymmetric substrate when a net dc transport is produced by an externally applied ac driving force or by periodically flashing the substrate. Recently, a new cl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0513960ea41bea24043a7a45b55c30bd
https://doi.org/10.1146/annurev-conmatphys-031016-025522
https://doi.org/10.1146/annurev-conmatphys-031016-025522
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
Using numerical simulations, we examine the dynamics of driven two-dimensional bidisperse disks flowing over quenched disorder. The system exhibits a series of distinct dynamical phases as a function of applied driving force and packing fraction incl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::244f8ea71fb622b0444c596150cba3a9
Publikováno v:
Physical Review B. 95
Using a simple numerical model of skyrmions in a two-dimensional system interacting with a quasi-one dimensional periodic substrate under combined dc and ac drives where the dc drive is applied perpendicular to the substrate periodicity, we show that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::531c82ce18db295e53ca3fe5c96d2b98
https://doi.org/10.1103/physrevb.95.014412
https://doi.org/10.1103/physrevb.95.014412
Publikováno v:
Physica C: Superconductivity and its Applications. 503:123-127
We examine the current driven dynamics for vortices interacting with conformal crystal pinning arrays and compare to the dynamics of vortices driven over random pinning arrays. We find that the pinning is enhanced in the conformal arrays for field de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::15c3832d262fb0cf251cececd1a599d7
https://doi.org/10.1016/j.physc.2014.04.038
https://doi.org/10.1016/j.physc.2014.04.038
Publikováno v:
Physica C: Superconductivity and its Applications. 503:52-57
Vortices in type-II superconductors have attracted enormous attention as ideal systems in which to study nonequilibrium collective phenomena, since the self-ordering of the vortices competes with quenched disorder and thermal effects. Dynamic effects
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d7cc5d7d7192ea725fe237c4f3476ce8
https://doi.org/10.1016/j.physc.2014.03.029
https://doi.org/10.1016/j.physc.2014.03.029