Stripe magnetism in a metallic triangular lattice antiferromagnet

Triangular lattice materials with antiferromagnetic interactions are a prototypical example of geometrical spin frustration and offer a platform for long-sought quantum spin liquid (QSL) states. In the presence of conduction electrons, chiral magnetic order or even chiral QSL states may emerge. Here, we present an experimental investigation of the triangular lattice compound CeLi₃Bi₂ through thermodynamic, electrical transport, nuclear magnetic resonance, and neutron diffraction measurements. We also perform band structure calculations obtained through density functional theory. Our results reveal that CeLi₃Bi₂ is semimetallic and orders antiferromagnetically at T_N = 1.2 K in a stripe phase. To determine the proximity of CeLi₃Bi₂ to a QSL state, additional neutron spectroscopy measurements are required.