Dynamics of magnetic flux lines in the presence of correlated disorder
| dc.contributor.author | Bullard, Thomas J. III | en |
| dc.contributor.author | Das, Jayajit | en |
| dc.contributor.author | Täuber, Uwe C. | en |
| dc.contributor.department | Physics | en |
| dc.date.accessioned | 2016-09-30T13:05:13Z | en |
| dc.date.available | 2016-09-30T13:05:13Z | en |
| dc.date.issued | 2013-07-28 | en |
| dc.description.abstract | We investigate the dynamics of interacting magnetic flux lines driven by an external current in the presence of linear pinning centers, arranged either in a periodic square lattice or placed randomly in space, by means of three-dimensional Monte Carlo simulations. Compared to the non-interacting case, the repulsive forces between the vortices reduce the critical current J_c, as determined from the depinning threshold in the current-voltage (I-V) characteristics. Near the depinning current J_c, the voltage power spectrum S(w) reveals broad-band noise, characterized by a $1/w^a$ power law decay with a <= 2. At larger currents the flux lines move with an average velocity v_{cm}. For a periodic arrangement of columnar pins with a lattice constant $d$ and just above J_c, distinct peaks appear in the voltage noise spectrum S(w) at w ~ v_{cm}/d which we interpret as the signature of stick-slip flux line motion. | en |
| dc.description.notes | Latex, 10 pages, four eps figures included | en |
| dc.identifier.uri | http://hdl.handle.net/10919/73104 | en |
| dc.relation.uri | http://arxiv.org/abs/cond-mat/0305061v1 | en |
| dc.rights | In Copyright | en |
| dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | en |
| dc.subject | cond-mat.supr-con | en |
| dc.subject | cond-mat.stat-mech | en |
| dc.title | Dynamics of magnetic flux lines in the presence of correlated disorder | en |
| dc.title.serial | In: Trends in Superconductivity Research (P.S. Lewis, ed.) 2004, 63 | en |
| dc.type | Article - Refereed | en |
| pubs.organisational-group | /Virginia Tech | en |
| pubs.organisational-group | /Virginia Tech/All T&R Faculty | en |
| pubs.organisational-group | /Virginia Tech/Science | en |
| pubs.organisational-group | /Virginia Tech/Science/COS T&R Faculty | en |
| pubs.organisational-group | /Virginia Tech/Science/Physics | en |