Signatures of interfacial topological chiral modes via RKKY exchange interaction in Dirac and Weyl systems
Ganesh C. Paul, SK Firoz Islam, Paramita Dutta, Arijit Saha
Abstract
We theoretically investigate the features of Ruderman-Kittel-Kasuya-Yosida (RKKY) exchange interaction between two magnetic impurities, mediated by the interfacial bound states inside a domain wall (DW). The latter separates the two regions with oppositely signed inversion symmetry broken terms in graphene and Weyl semimetal. The DW is modeled by a smooth quantum well which hosts a number of discrete bound states including a pair of gapless, metallic modes with opposite chiralities. We find clear signatures of these interfacial chiral bound states in spin response (RKKY exchange interaction) which is robust to the deformation of the quantum well.
Topics & Concepts
RKKY interactionBound statePhysicsCondensed matter physicsGapless playbackChiral anomalyMAJORANAGraphenePoint reflectionExchange interactionQuantum mechanicsFerromagnetismFermionSuperconductivityTopological Materials and PhenomenaAdvanced Condensed Matter PhysicsQuantum many-body systems