2024/09/04 by Xiyang Li, A. Nocera, Li, X. Y. +16
Materials Science · #Boron and Carbon Nanomaterials Research #FOS: Physical sciences #Hydrogen Storage and Materials #MXene and MAX Phase Materials #Materials Science (cond-mat.mtrl-sci) #Strongly Correlated Electrons (cond-mat.str-el)
paper · pdf · doi:10.48550/arxiv.2409.02880
openalex publication_date 2024/09/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Electronic correlations lead to heavy quasiparticles in three-dimensional (3D) metals, and their collapse can destabilize magnetic moments. It is an open question whether there is an analogous instability in one-dimensional (1D) systems, unanswered due to the lack of metallic spin chain materials. We report neutron scattering measurements and Density Matrix Renormalization Group calculations establishing spinons in the correlated metal Ti4MnBi2, confirming that its magnetism is 1D. Ti4MnBi2 is inherently frustrated, forming near a quantum critical point (QCP) separating different temperature T = 0 phases of the J1-J2 XXZ model. 1D magnetism dominates to the lowest T, and is barely affected by weak interchain coupling. Ti4MnBi2 is the first metallic spin chain where 3D conduction electrons become strongly correlated due to their coupling to 1D magnetic moments.