Science, Space and Technology News 2024
Through experiments at the BER II neutron source and its High-Field Magnet, researchers have discovered new quantum states in the material SrCu22 under extreme magnetic fields. Identifying a spin-nematic phase that resembles the condensation of bosonic Cooper pairs, this study emphasizes the utility of neutron scattering in exploring unknown aspects of quantum materials, offering insights into complex many-body systems under conditions of strong frustration. Credit: SciTechDaily.
“We measured in November 2019, our experiment was one of the very last ones performed on the High-Field Magnet at BER,” Dr. Ellen Fogh points out. The physicist leads a team at the Laboratory of Quantum Magnetism at the Ecole Polytechnique Fédérale de Lausanne and has now published intriguing new insights in quantum materials obtained in collaboration with colleagues from Japan, Qatar, and Switzerland.
Schematic illustration of a 2D spin-lattice with orthogonal orientation of spin pairs. Bound pair of magnons are represented by the red/blue and green pinwheels. Credit: EPFL“The evaluation took a lot of time,” she says. This is because the neutron scattering data do not automatically provide a picture, but have to be interpreted. This requires convincing theoretical models. “We played a game of ping-pong with a team of theorists, but now we have some very interesting results.
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