Bulletin of ANPA

Abstract submitted to ANPA Conference July 14–16, 2023

Volume 5, Number 1

Condensed Matter Physics and Material Science
Abstract ID: ANPA2023-N00057

Abstract:

ANPA2023-N00057: Large anomalous Hall effect resulting from the interplay between topology and_x000D_ magnetism in RAlGe compounds.

Authors:

  • Chetan Dhital; Department of Physics, Kennesaw State University

The simultaneous breaking of space inversion and the time reversal symmetries in_x000D_ solids lead to several novel electronic and magnetic phases such as magnetic Weyl_x000D_ semimetals, Dirac semimetals, Fermi arcs, and magnetic skyrmions. Furthermore, it_x000D_ leads to the possibility of tuning electronic topological phases with magnetism and_x000D_ vice versa. Materials having heavy rare earth elements are suitable for the study of_x000D_ intertwined electronic band topology and magnetism due to their penchant for longrange magnetic ordering, strong spin-orbit coupling, and low carrier density semimetallic behavior. Recent studies have indicated that RAlGe (R=Rare earth) family_x000D_ of materials have shown promising electronic and magnetic behavior indicating the_x000D_ connection between electronic topology and magnetism. Recently our group has_x000D_ studied the electrical and magnetic behavior of NdAlGe. Our observations indicate_x000D_ that NdAlGe has complex magnetic structure indicated by two magnetic_x000D_ wavevectors, low carrier density semi metallic behavior, and two regions of large_x000D_ anomalous Hall effect. The electronic structure calculation indicates the presence of_x000D_ Weyl nodes near Fermi surface and nested Fermi pockets with nesting vector equal_x000D_ to the magnetic wavevector. The observed anomalous Hall conductivity is close to_x000D_ the calculated intrinsic conductivity from Berry curvature. I will discuss these results_x000D_ in reference to the interplay between electronic topology and magnetism._x000D_ This work is supported by NSF DMR-2213443.

To cite this abstract, use the following reference: https://anpaglobal.org/conference/2023/ANPA2023-N00057