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Large anomalous Nernst and spin Nernst effects in the noncollinear antiferromagnets <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Mn</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:mi>X</mml:mi></mml:mrow></mml:math> ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>X</mml:mi><mml:mo>=</mml:mo><mml:mi>Sn</mml:mi><mml:mo>,</mml:mo><mml:mi>Ge</mml:mi><mml:mo>,</mml:mo><mml:mi>Ga</mml:mi></mml:mrow></mml:math> )

Large anomalous Nernst and spin Nernst effects in the noncollinear antiferromagnets <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Mn</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:mi>X</mml:mi></mml:mrow></mml:math> ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>X</mml:mi><mml:mo>=</mml:mo><mml:mi>Sn</mml:mi><mml:mo>,</mml:mo><mml:mi>Ge</mml:mi><mml:mo>,</mml:mo><mml:mi>Ga</mml:mi></mml:mrow></mml:math> )

Noncollinear antiferromagnets have recently been attracting considerable interest partly due to recent surprising discoveries of the anomalous Hall effect (AHE) in them and partly because they have promising applications in antiferromagnetic spintronics. Here we study the anomalous Nernst effect (ANE), a phenomenon having the same origin as the AHE, and …