Parts | Days | Selection | Search | Updates | Downloads | Help
BP: Fachverband Biologische Physik
BP 39: The Collapsed State of Polymers: From Physical Concepts to Applications and Biological Systems (accompanying session, joint CPP/BP/DY)
BP 39.7: Talk
Thursday, April 3, 2014, 17:00–17:15, ZEU 250
Loop models in Magnetic Spin Ice crystals — •Ludovic Jaubert1, Masud Haque2, and Roderich Moessner2 — 1OIST, Okinawa, Japan — 2MPI-PkS, Dresden
Loops are ubiquitous in physics, either as tangible entities such as polymers, or as emergent phenomena, especially where we do not expect them. In this talk, we shall focus on the latter case, where loops appear as extended degrees of freedom in spin ice crystals.
Spin ice has become a canonical member of the large and growing family of frustrated magnets, where excitations take the form of magnetic monopoles. The ground state of this system is highly degenerate and can be mapped exactly onto a fully packed loop model. We studied the statistics of this model both in 2 and 3 dimensions [1], making contact with Stochastic-Loewner Evolution processes (SLE), percolation and polymer physics, before illustrating implications of these results in related problems (Heisenberg magnets, itinerant electrons [2]).
[1] Jaubert, Haque, Moessner, PRL, 107, 177202 (2011)
[2] Jaubert, Pitaecki, Haque & Moessner, PRB, 85, 054425 (2012)