Researchers have discovered a material crystal composed of cerium, aluminium, germanium, and silicon that changes electrical resistance only when a magnetic field is applied at a narrowly confined angle. The effect, which has been dubbed “singular angular magnetoresistance,” can be attributed to the symmetry – in particular, the ordering of the cerium atoms’ magnetic moments. Their results are published in Science.
The researchers are from the Massachusetts Institute of Technology (MIT), the French National Centre for Scientific Research (CNRS) and École Normale Supérieure (ENS) de Lyon, University of California at Santa Barbara (UCSB), the Hong Kong University of Science and Technology (HKUST), and NIST Center for Neutron Research, led by Joseph G. Checkelsky, assistant professor of physics at MIT.
Read the research paper: Singular angular magnetoresistance in a magnetic nodal semimetal, T. Suzuki et al., Science 10.1126/science.aat0348.