Magnetoelastic Correlations in Quantum Magnets

Marcelo Jaime (National High Magnetic Field Laboratory, LANL)

Quantum magnets are natural realizations of gases of interacting bosons whose relevant parameters such as dimensionality, lattice geometry, amount of disorder, nature of the interactions, and particle concentration can vary widely between different compounds. The particle concentration can be easily tuned by applying an external magnetic field which plays the role of a chemical potential. A rich spectrum of realizations offers a unique possibility for studying the different physical behaviors that emerge in interacting Bose gases from the interplay between their relevant parameters. The plethora of bosonic phases that can emerge in quantum magnets includes Bose-Einstein condensates (BEC) and Tomonaga-Luttinger liquids, as well as highly frustrated states accompanied by externally-induced magnetic textures, is intriguing and not always easy to predict [1]. Here we review recent results for the strength of magnetoelactic correlations in a variety of quantum magnets, including examples of BEC materials and frustrated counterparts such as SrCu₂(BO₃)₂, BiCuPO₄, and Ba₂Cl₂CoO₆Si₂, as a smoking gun for frustration and broken symmetries crucial to determine the ground state.

[1] V. Zapf, M. Jaime, and C.D. Batista, Rev. Mod. Phys. 86, 563 (2014).

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