Low-energy magnetic modes in SeCuO3
One of the questions in solid state physics is how local quantum states evolve into collective states. An intriguing scenario occurs when the basic magnetic unit consists of several spins, i.e. clusters, ordered in such a way that when isolated exhibit a nonmagnetic singlet ground state. Such systems should intrinsically oppose long-ranged magnetic order and, when ordered, retain quantum behavior. SeCuO3 is a candidate where such behavior should be visible. It consists of two distinct Cu sites, and its magnetic structure can be visualized as a 3D web built of weakly-coupled spin tetramers. The system orders as AFM at 8K, but quantum correlations can be seen even at room temperature. Here we propose to investigate low-energy acoustical magnon excitation, which should correspond to one of the inter-tetramer interactions.
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SURIJA Vinko; PRSA Krunoslav; Henrik M. Ronnow; STEFFENS Paul and ZIVKOVIC Ivica. (2015). Low-energy magnetic modes in SeCuO3. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-01-1459
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