Dresden 2026 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 79: Correlated Magnetism – Transport
TT 79.4: Talk
Thursday, March 12, 2026, 12:15–12:30, HSZ/0103
Observation via spin Seebeck effect of macroscopic magnetic transport from emergent magnetic monopoles — •Nan Tang1, Josef Willsher2, Stephan Glamsch3, Aisha Aqeel3, Ludwig Scheuchenpflug1, Michael Schulze4, Christoph Liebald5, Daniel Rytz5, Christo Guguschev4, Manfred Albrecht3, Roderich Moessner2, and Philipp Gegenwart1 — 1Experimentalphysik VI, Universität Augsburg, Augsburg, Germany — 2Max-Planck-Institut für Physik komplexer Systeme, Dresden, Germany — 3Experimentalphysik VI, Universität Augsburg, Augsburg, Germany — 4Leibniz-Institut für Kristallzüchtung (IKZ), Berlin, Germany — 5EOT GmbH-Coherent, Idar-Oberstein, Germany
Magnetic monopoles, elusive in high-energy physics, have been realised as emergent quasiparticles in solid-state systems, where topological defects act as effective magnetic charges. They have been proposed in diverse platforms, including skyrmion lattices, chiral magnets, soft ferromagnets, and artificial nanomagnets, yet their role in magnetic transport has remained unconfirmed. Here, we demonstrate such transport via the spin Seebeck effect in the insulating pyrochlore Dy2Ti2O7. A thermal gradient applied perpendicular to a [111]-oriented magnetic field yields a spin Seebeck voltage showing a dominant peak at monopole proliferation, alongside a secondary feature and frequency-dependent behavior. These results establish a direct link between monopole dynamics and magnetic transport in an insulator and provide a route to probing fractionalized excitations and spintronic functionalities.
Keywords: spin Seebeck effect; spin ice; magnetic monopoles; magnetotransport; frustrated magnets