Unconventional Hall response in the quantum limit of HfTe<sub>5</sub>.
Stanisław Gałeski, Xiangyang Zhao, R. Wawrzyńczak, Tobias Meng, Tobias Förster, P. M. Lozano, S. Honnali, Neetu Lamba, Toni Ehmcke, Αναστάσιος Μάρκου, Qiang Li, Genda Gu, Wenliang Zhu, J. Wosnitza, Claudia Felser, Genfu Chen, Johannes Gooth
Abstract
, adjacent to the three-dimensional quantum Hall effect of a single electron band at low magnetic fields. The additional plateau-like feature in the Hall conductivity of the lowest Landau level is accompanied by a Shubnikov-de Haas minimum in the longitudinal electrical resistivity and its magnitude relates as 3/5 to the height of the last plateau of the three-dimensional quantum Hall effect. Our findings are consistent with strong electron-electron interactions, stabilizing an unconventional variant of the Hall effect in a three-dimensional material in the quantum limit.