According to a press release by Boston College and published in Phys.Org, researchers have discovered a "layer" Hall effect in a solid state chip constructed of antiferromagnetic manganese bismuth telluride, a finding that signals a much sought-after topological Axion insulating state, the team reports in the current edition of the journal Nature.
The team of researchers included Boston College Assistant Professor of Physics Qiong Ma, a senior researcher on the project, which included 36 scientists from universities in the U.S., Japan, China, Taiwan, Germany, and India. Ma is also a principal investigator at the Center for the Advancement of Topological Semimetals (CATS) led by the U.S. Department of Energy's Ames Laboratory.
News Link: Researchers discover a 'layer hall effect' in a 2D topological Axion antiferromagnet