Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 19: Frustrated Magnets - Spin Liquids - Theory
TT 19.6: Vortrag
Montag, 12. März 2018, 16:15–16:30, H 3010
Probing α -RuCl3 beyond magnetic order: Effects of temperature and magnetic field — •David Kaib1, Stephen Winter1, Kira Riedl1, Radu Coldea2, and Roser Valenti1 — 1Institut für Theoretische Physik, Goethe-Universität Frankfurt — 2Clarendon Laboratory, University of Oxford
Recent studies have brought α -RuCl3 to the forefront of experimental searches for materials realizing Kitaev spin-liquid physics. This material exhibits strongly anisotropic exchange interactions afforded by the spin-orbit coupling of the 4d Ru centers. Under strong scrutiny is the nature of the unconventional continuum of magnetic excitations [1, 2], as well as reported unconventional paramagnetic states that emerge at finite temperature [3] and finite magnetic field [4] after suppression of magnetic order. Using exact diagonalization calculations of an ab-initio guided spin model complemented by semi-classical analysis, we find a very rich evolution of the spin dynamics and the stabilization of a quantum paramagnetic state as the zigzag order is suppressed [5].
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Z. Wang et al., arXiv: 1706.06157 (2017).
S. M. Winter et al., arXiv:1707.08144 (2017).