Discovery challenges existing theories of magnetism in kagome metals

Phys.org  October 30, 2024 The rare earth RMn6Sn6 (R = rare earth) family magnetic kagome systems, where their kagome flat bands are calculated to be near the Fermi level in the paramagnetic phase have been reported. While partially filling a kagome flat band is predicted to give rise to a Stoner-type ferromagnetism, experimental visualization of the magnetic splitting across the ordering temperature has not been reported for any of these systems leaving the nature of magnetism in kagome magnets an open question. An international team of researchers (USA – Rice University, Brookhaven National Lab, Los Alamos National Laboratory, Israel, Czech Republic) probed […]

Magnetism fosters unusual electronic order in quantum material

Phys.org  March 13, 2023 Various correlated electronic phases have been discovered in kagome lattice materials, including magnetism, charge density waves, nematicity and superconductivity. Recently, a charge density wave was discovered in the magnetic kagome FeGe, providing a platform for understanding the interplay between charge order and magnetism in kagome materials. An internationl team of researchers (USA – Rice University, UC Berkeley, University of Washington, University, SLAC National Acclerator Laboratory, Oak Ridge National Laboratory, Lawrence Berkeley Laboratory, Israel, China) observed all three electronic signatures of the kagome lattice in FeGe using angle-resolved photoemission spectroscopy. They showed that the presence of van […]