The team set out to better understand the magnetism in TbMn6Sn6 and used calculations and neutron scattering data collected from the Oak Ridge Spallation Neutron Source to conduct their analysis. Rob McQueeney, a scientist at Ames Lab and the project leader, explained that topological materials “have a special property where under the influence of magnetism, you can get currents which flow on the edge of the material, which are dissipationless, which means that the electrons don’t scatter, and they don’t dissipate energy.” Using magnetic atoms to construct the lattice of these materials, such as Mn in TbMn6Sn6, can further help inducing topological features. The Kagome structure in particular leads to complex and potentially tunable features in the electronic bands. These special shapes, called topological features, are responsible for the unique ways electrons behave in these materials. The band structure is strongly dependent on the geometry of the atomic lattice, and sometimes bands may display special shapes such as cones. Solid materials have electronic properties controlled by their electronic band structure characteristics. This characteristic causes electrons within the material to behave in unique ways. The arrangement of the atoms in Kagome metals reproduces the weaving pattern. The weave produces a pattern of hexagons surrounded by triangles and vice-versa. Kagomes are a type of material whose structure is named after a traditional Japanese basket weaving technique. The research is discussed in the paper “Low-temperature competing magnetic energy scales in the topological ferrimagnet TbMn6Sn6,” published in Physical Review X.
These results could impact future technological advancements in quantum computing, magnetic storage media, and high-precision sensors. Department of Energy’s Ames National Laboratory and Oak Ridge National Laboratory conducted an in-depth investigation of the Kagome layered topological material TbMn6Sn6 to understand it and its magnetic characteristics better.
0 kommentar(er)
