Possible Weyl fermions in the magnetic Kondo system CeSb
Source abstract
Abstract
Abstract Materials where the electronic bands have unusual topologies allow for the realisation of novel physics and have a wide range of potential applications. When two electronic bands with linear dispersions intersect at a point, the excitations could be described as Weyl fermions, which are massless particles with a particular chirality. Here we report evidence for the presence of Weyl fermions in the ferromagnetic state of the low-carrier density, strongly correlated Kondo lattice system CeSb, from electronic structure calculations and angle-dependent magnetoresistance measurements. When the applied magnetic field is parallel to the electric current, a pronounced negative magnetoresistance is observed within the ferromagnetic state, which is destroyed upon slightly rotating the field away. These results give evidence for CeSb belonging to a new class of Kondo lattice materials with Weyl fermions in the ferromagnetic state.
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Research context
OpenAlex topics: Rare-earth and actinide compounds · Topological Materials and Phenomena · Chemical and Physical Properties of Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (44)
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