Large intrinsic anomalous Hall effect in both <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Nb</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>FeB</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Ta</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>FeB</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math> with collinear antiferromagnetism
Xiao-Yao Hou, Huan-Cheng Yang, Zheng-Xin Liu, Peng‐Jie Guo, Zhong-Yi Lu
Abstract
It is rarely reported that collinear antiferromagnetic (AFM) metals can exhibit the anomalous Hall effect (AHE). In this Letter, based on symmetry analysis and the first-principles electronic structure calculations, we predict that two existing collinear antiferromagnets ${\mathrm{Nb}}_{2}{\mathrm{FeB}}_{2}$ and ${\mathrm{Ta}}_{2}{\mathrm{FeB}}_{2}$, whose N\'eel temperatures are above room temperature, have a very large AHE with anomalous Hall conductance (AHC) $\ensuremath{-}100$ and $\ensuremath{-}54\phantom{\rule{4pt}{0ex}}{\mathrm{\ensuremath{\Omega}}}^{\ensuremath{-}1}\phantom{\rule{0.16em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}1}$, respectively. We further complete the symmetry requirements for realizing the AHE in collinear antiferromagnetism.