Spin-texture-driven electrical transport in multi-Q antiferromagnets
S. Seo, Satoru Hayami, Ying Su, S. M. Thomas, F. Ronning, E. D. Bauer, J. D. Thompson, Shi‐Zeng Lin, P. F. S. Rosa
Abstract
Abstract Unusual magnetic textures can be stabilized in f -electron materials due to the interplay between competing magnetic interactions, complex Fermi surfaces, and crystalline anisotropy. Here we investigate CeAuSb 2 , an f -electron incommensurate antiferromagnet hosting both single- Q and double- Q spin textures as a function of magnetic fields ( H ) applied along the c axis. Experimentally, we map out the field-temperature phase diagram via electrical resistivity and thermal expansion measurements. Supported by calculations of a Kondo lattice model, we attribute the puzzling magnetoresistance enhancement in the double- Q phase to the localization of the electronic wave functions caused by the incommensurate magnetic texture.