Anisotropic physical properties and pressure dependent magnetic ordering of CrAuTe$_4$

Systematic measurements of temperature dependent magnetization, resistivity and angle-resolved photoemission spectroscopy (ARPES) at ambient pressure as well as resistivity under pressures up to 5.25 GPa were conducted on single crystals of CrAuTe$_4$. Magnetization data suggest that magnetic moments are aligned antiferromagnetically along the crystallographic $c$-axis below $T_\textrm{N}$ = 255\,K. Magnetoresistance data show clear anisotropy, and, at high fields, quantum oscillations. The Neel temperature decreases monotonically under pressure, down to $T_\textrm{N}$ = 236\,K at 5.22\,GPa. The pressure dependence of transport properties show anomalies near 2\,GPa suggesting that there is a phase transition (structural, magnetic, and/or electronic) induced by pressure. For pressures higher than 2\,GPa a significantly different quantum oscillation frequency emerges, consistent with a pressure induced change in the electronic states.