Berlin 2015 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 100: Correlated Electrons: Other Materials

TT 100.7: Vortrag

Donnerstag, 19. März 2015, 16:30–16:45, H 3005

Spinon Confinement in the Quasi-1D Ising-like Antiferromagnet SrCo₂V₂O₈ — •Zhe Wang¹, Michael Schmidt¹, Anup Kumar Bera², Bella Lake^2,3, Alois Loidl¹, and Joachim Deisenhofer¹ — ¹Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, Augsburg, Germany — ²Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, Germany — ³Institut für Festkoerperphysik, Technische Universität Berlin, Berlin, Germany

Using THz transmission spectroscopy in magnetic field, we have investigated low-energy magnetic excitations in the quasi-one-dimensional Ising-like XXZ antiferromagnet SrCo₂V₂O₈. Spinon-pair excitations on the antiferromagnetic ground state have been observed in the XXZ antiferromagnet. Spinon-pair bound states with entangled spin-orbit moment S = 1 are determined unambiguously. The hierarchy of the spinon-pair boundstates can be described by a one-dimensional Schrödinger equation with a linear confinement potential imposed by the interchain interaction.