Contribution of electronic entropy to the order-disorder transition of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Cu</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:mi>Au</mml:mi></mml:mrow></mml:math>
Physical review research