Signature of magnetic monopole and Dirac string dynamics in spin ice

Details Signature of magnetic monopole and Dirac string dynamics in spin ice Signature of magnetic monopole and Dirac string dynamics in spin ice

2009-03-05

arxiv.org/abs/0903.1074v3

Nature Phys.5:258-261,2009

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

10.1038/nphys1227

Magnetic monopoles have eluded experimental detection since their prediction nearly a century ago by Dirac. Recently it has been shown that classical analogues of these enigmatic particles occur as excitations out of the topological ground state of a model magnetic system, dipolar spin ice. These quasi-particle excitations do not require a modification of Maxwell's equations, but they do interact via Coulombs law and are of magnetic origin. In this paper we present an experimentally measurable signature of monopole dynamics and show that magnetic relaxation measurements in the spin ice material $Dy_{2}Ti_{2}O_{7}$ can be interpreted entirely in terms of the diffusive motion of monopoles in the grand canonical ensemble, constrained by a network of "Dirac strings" filling the quasi-particle vacuum. In a magnetic field the topology of the network prevents charge flow in the steady state, but there is a monopole density gradient near the surface of an open system.

Affiliated with

Also associated with

No associations

Rating

Signature of magnetic monopole and Dirac string dynamics in spin ice does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Signature of magnetic monopole and Dirac string dynamics in spin ice, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signature of magnetic monopole and Dirac string dynamics in spin ice will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-115896