2024/12/03 by Subhadip Pradhan, Pradhan, Subhadip, Kartik Samanta +3
Physics and Astronomy · #Advanced Condensed Matter Physics #Topological Materials and Phenomena
paper · pdf · doi:10.48550/arxiv.2412.02324
The intricate interplay between magnetism and the topology of electronic structures provides a rich avenue for tailoring materials with unique and potent anomalous transport properties. In this paper, we present a strategy for inducing robust Berry curvature and anomalous transverse conductivity in noncollinear antiferromagnets through an unconventional approach termed ``small staggered rotation of spin". Considering noncollinear Mn3Sn, we demonstrate that the positive vector chirality antiferromagnetic configuration, typically associated with a vanishing anomalous Hall effect and Nernst effect, can be manipulated to exhibit finite anomalous Hall conductivity (AHC) and anomalous Nernst conductivity (ANC) through staggered rotation. Furthermore, we illustrate that the value and sign of both the AHC and ANC can be tuned through staggered rotation. This tuning is intricately influenced by the spin-orbit coupling (SOC) induced gapped nodal line, revealing the critical role of electronic structure modifications in achieving precise control over transport properties.