Erratum: Frustrated Magnetic Interactions and Quenched Spin Fluctuations in CrAs [Chin. Phys. Lett. 39, 127501 (2022)]
Year: 2023
Type: erratum
Abstract: The discovery of pressure-induced superconductivity in helimagnets (CrAs, MnP) has attracted considerable interest in understanding the relationship between complex magnetism and unconventional superconductivity.However, the nature of the magnetism and magnetic interactions that drive the unusual double-helical magnetic order in these materials remains unclear.Here, we report neutron scattering measurements of magnetic excitations in CrAs single crystals at ambient pressure.Our experiments reveal well defined spin wave excitations up to about 150 meV with a pseudogap below 7 meV, which can be effectively described by the Heisenberg model with nearest neighbor exchange interactions.Most surprisingly, the spin excitations are largely quenched above the Néel temperature, in contrast to cuprates and iron pnictides where the spectral weight is mostly preserved in the paramagnetic state.Our results suggest that the helimagnetic order is driven by strongly frustrated exchange interactions, and that CrAs is at the verge of itinerant and correlation-induced localized states, which is therefore highly pressure-tunable and favorable for superconductivity.
Source: Chinese Physics Letters
Institutions: Fudan University, State Key Laboratory of Surface Physics, Shanghai Qi Zhi Institute, Rutherford Appleton Laboratory, ISIS Neutron and Muon Source, National Institute of Standards and Technology, NIST Center for Neutron Research, University of Maryland, College Park, Shanghai Research Center for Quantum Sciences
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4319442205