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MA: Fachverband Magnetismus

MA 16: Frustrated Magnets

MA 16.1: Talk

Tuesday, September 6, 2022, 15:00–15:15, H37

Another Exact Ground State of a 2D Quantum Antiferromagnet — •Pratyay Ghosh, Tobias Müller, and Ronny Thomale — Institut für Theoretische Physik und Astrophysik and Würzburg-Dresden Cluster of Excellence ct.qmat, Universität Würzburg, Am Hubland Campus Süd, Würzburg 97074, Germany

We present the exact dimer ground state of a quantum antiferromagnet on the maple-leaf lattice. A coupling anisotropy for one of the three inequivalent nearest-neighbor bonds is sufficient to stabilize the dimer state. Together with the Shastry-Sutherland Hamiltonian, we show that this is the only other model with an exact dimer ground state for all two-dimensional lattices with uniform tilings.