Dresden 2014 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 48: The Collapsed State of Polymers: From Physical Concepts to Applications and Biological Systems (joint session with BP)

CPP 48.7: Vortrag

Donnerstag, 3. April 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)