No material perfectly realizes the frustrated quantum ferro-antiferromagnetic Heisenberg model on a square lattice, but BaCdVO(PO${}_{4}$)${}_{2}$ comes close. Here, the authors perform neutron spectroscopy measurements in high magnetic fields to… Click to show full abstract
No material perfectly realizes the frustrated quantum ferro-antiferromagnetic Heisenberg model on a square lattice, but BaCdVO(PO${}_{4}$)${}_{2}$ comes close. Here, the authors perform neutron spectroscopy measurements in high magnetic fields to determine an appropriate spin Hamiltonian for this system. They overcome numerous technical difficulties, such as the required ${}^{114}$Cd enrichment for neutron experiments and the complex sample mosaic. The results will help understand the previously discovered presaturation phase in this compound. Could it be the elusive spin nematic state?
Journal Title: Physical Review B
Year Published: 2021
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