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TT: Fachverband Tiefe Temperaturen

TT 33: Postersession Correlated Electrons: Metal Insulator Transition, Spin Systems and Itinerant Magnets

TT 33.15: Poster

Wednesday, March 25, 2009, 14:00–18:00, P1A

Spin-1 anisotropic Heisenberg antiferromagnets — •David Peters¹, Ian McCulloch², and Walter Selke¹ — ¹RWTH Aachen University and JARA-SIM, Germany — ²The University of Queensland, Australia

Intricate phase diagrams of spin-1 Heisenberg antiferromagnets with exchange and single-ion anisotropy are studied using mainly density matrix renormalization group techniques.

Various phases are identified, including antiferromagnetic, spin-liquid (or spin-flop), supersolid (or biconical), and ferromagnetic phases. Results are compared to recent findings on related quantum models and to properties of corresponding classical spin systems.

Funded by the Excellence Initiative of the German federal and state governments.