<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>G</mml:mi> </mml:math> -type antiferromagnetic <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>BiFeO</mml:mi> <mml:mn>3</mml:mn> </mml:msub> </mml:math> is a multiferroic <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>g</mml:mi> </mml:math> -wave altermagnet

Abstract

Altermagnetic spin splitting is often missed by conventional band structure plots, as it often vanishes along the high-symmetry lines and planes in the Brillouin zone shown in these plots. Here, the authors introduce a novel band structure plotting method that incorporates high-symmetry and general lines to make the splitting apparent. A framework to classify the splitting in three dimensions and its nodal surfaces is also developed. These concepts are demonstrated in a theoretical study of altermagnetism in multiferroic BiFeO${}_{3}$.

Topics & Concepts