Manipulating magnetism in the topological semimetal <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>EuCd</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>As</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>
Na Hyun Jo, Brinda Kuthanazhi, Yun Wu, Erik Timmons, Tae‐Hoon Kim, Lin Zhou, Lin‐Lin Wang, B. G. Ueland, Andriy Palasyuk, D. H. Ryan, R. J. McQueeney, Kyungchan Lee, Benjamin Schrunk, A. A. Burkov, R. Prozorov, Sergey L. Bud’ko, Adam Kaminski, P. C. Canfield
Abstract
${\mathrm{EuCd}}_{2}{\mathrm{As}}_{2}$ is a magnetic semimetal that has the potential of manifesting nontrivial electronic states, depending on its low temperature magnetic ordering. Here, we report the successful synthesis of single crystals of ${\mathrm{EuCd}}_{2}{\mathrm{As}}_{2}$ that order ferromagnetically or antiferromagnetically depending on the level of band filling, thus allowing for the use of magnetism to tune the topological properties within the same host. We explored their physical properties via magnetization, electrical transport, heat capacity, and angle-resolved photoemission spectroscopy measurements and conclude that ${\mathrm{EuCd}}_{2}{\mathrm{As}}_{2}$ is an excellent, tunable system for exploring the interplay of magnetic ordering and topology.