Souvik Sasmal1,Bikash Patra1,Kritika Vijay2,Gourav Dwari1,Bishal Maity1,Soma Banik2,Bahadur Singh1,Arumugam Thamizhavel1
Tata Institute of Fundamental Research1,Raja Ramanna Centre for Advanced Technology2
Souvik Sasmal1,Bikash Patra1,Kritika Vijay2,Gourav Dwari1,Bishal Maity1,Soma Banik2,Bahadur Singh1,Arumugam Thamizhavel1
Tata Institute of Fundamental Research1,Raja Ramanna Centre for Advanced Technology2
Magnetic Dirac semimetal is of great interest among researchers these days. Many of these Dirac semimetals are protected by the combination of crystal symmetries and a special antiferromagnetic time-reversal symmetry <sup>[1]</sup>. There are limited systems that show magnetic Dirac state. Recently, the EuCd<sub>2</sub>As<sub>2</sub> compound has been identified as magnetic Weyl semimetal <sup>[2]</sup>. A single crystal of EuCu<sub>2</sub>Sb<sub>2</sub> was synthesized by flux growth method using Cu-Sb flux. The crystal structure of EuCu<sub>2</sub>Sb<sub>2</sub> contains a subsequent magnetic Eu<sup>2+</sup> and non-magnetic [Cu<sub>2</sub>Sb<sub>2</sub>]<sup>2-</sup> layers perpendicular to <i>c</i>- axis, and Eu moments align in antiferromagnetically between two adjacent layers. Electrical resistivity and specific heat data show antiferromagnetic transition at 5.1 K. Interestingly, it shows negligible Hall resistance with the applied magnetic field 0 – 14 T. In Angle-resolved photoemission spectroscopy measurement, the linear band crossing near the Fermi level suggests Dirac like band dispersion which results in unconventional Hall resistance.<br/><br/>[1] Young, Steve M. and Wieder, Benjamin J., <i>Phys. Rev. Lett. 118, 186401 (2017).</i><br/>[2] Soh, J.-R. <i>et al</i>., <i>Phys. Rev. B</i> 100, 201102 (2019).