Magnetic mixed valent semimetal <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow><mml:mi>EuZnSb</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:math> with Dirac states in the band structure
Aifeng Wang, Sviatoslav Baranets, Yu Liu, Xiao Tong, Eli Stavitski, Jing Zhang, Yisheng Chai, Wei‐Guo Yin, Svilen Bobev, C. Petrović
Abstract
We report discovery of antiferromagnetic semimetal EuZnSb 2 , obtained and studied in the form of single crystals. Electric resistivity, magnetic susceptibility, and heat capacity indicate antiferromagnetic order of Eu with T N = 20 K. The effective moment of Eu 2+ inferred from the magnetization and specific heat measurement is 3.5 B , smaller than the theoretical value of Eu 2+ due to presence of both Eu 3+ and Eu 2+ . Magnetic-fielddependent resistivity measurements suggest dominant quasi-two-dimensional Fermi surfaces whereas the firstprinciple calculations point to the presence of Dirac fermions. Therefore, EuZnSb 2 could represent the first platform to study the interplay of dynamical charge fluctuations, localized magnetic 4 f moments, and Dirac states with Sb orbital character.