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Magnetic excitations in infinite-layer nickelates.
1Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, CA 94025, USA.
Researchers studied magnetic excitations in infinite-layer nickelates, a material class similar to cuprate superconductors. They found that doping affects magnetic properties, highlighting the role of Mottness in these novel materials.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Materials
Background:
- Infinite-layer nickelates are a new class of superconductors.
- They share similarities with cuprate superconductors, a well-studied family.
Purpose of the Study:
- To investigate the magnetic excitations in infinite-layer nickelates.
- To understand the influence of doping on these magnetic properties.
Main Methods:
- Resonant inelastic x-ray scattering (RIXS) was used.
- Measurements were performed at the Nickel (Ni) L3-edge.
Main Results:
- Undoped NdNiO2 exhibits dispersive magnetic excitations with a bandwidth of ~200 meV, similar to spin waves.
- Doping leads to a decrease in spectral weight and energy, with modes becoming overdamped.
- Significant damping suggests coupling to rare-earth itinerant electrons.
Conclusions:
- The study highlights the importance of Mottness in infinite-layer nickelates.
- Magnetic excitations provide insights into the electronic structure and superconducting mechanism.
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