Berlin 2024 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 87: Frustrated Magnets: Spin Liquids
TT 87.9: Talk
Friday, March 22, 2024, 11:45–12:00, H 3010
A novel classical spin-liquid with fractionalized bionic charges and chiral field excitations in the pyrochlore lattice — •Daniel Lozano-Gómez1,2, Yasir Iqbal3,4, and Matthias Vojta1,2 — 1Technische Universität Dresden, Dresden, Germany — 2Institut für Theoretische Physik and Würzburg-Dresden Cluster of Excellence ct.qmat, Dresden, Germany — 3Indian Institute of Technology-Madras, Chennai, India — 4The Quantum Centers in Diamond and Emerging Materials, Chennai, India
Classical spin-liquid phases are generally described by emergent low-temperature gauge symmetries with fractionalized excitations and a system-size-dependent degeneracy of the ground-state manifold. In the study of spin-liquids, the pyrochlore lattice has demonstrated to be fruitful ground in the theoretical and experimental realization of such phases. Indeed, recent work on bilinear spin models in this lattice has identified a variety of classical and quantum spin-liquids whose most prominent examples are spin-ice, quantum spin-ice, higher-rank, and a 2-form spin-liquid. In contrast, much less attention has been devoted to spin models with interactions beyond bilinear spin terms realizing such highly correlated phases. In this work, we present a Hamiltonian composed of a three-body spin term that realizes a novel classical spin-liquid phase. We demonstrate that the ground-state manifold of this Hamiltonian is described by a subspace of the so-called color-ice-state manifold and that a gauge field theory describing the ground-state manifold possesses a chiral term that constraints the emergent gauge fields to follow a right-hand-rule.
Keywords: Pyrochlore; Fractionalized; Bions; Chiral; Emergent