TiSe2 is a typical transition-metal dichalcogenide known for its charge-density wave order. In this study, we report the observation of an unusual anisotropic negative magnetoresistance in exfoliated TiSe2 nanoflakes at low temperatures. Unlike the negative magnetoresistance reported in most other transition-metal dichalcogenides, our results cannot be explained by either the conventional two-dimensional weak localization effect or the Kondo effect. A comprehensive analysis of the data suggests that the observed anisotropic negative magnetoresistance in TiSe2 flakes is most likely caused by the three-dimensional weak localization effect. Our findings contribute to a deeper understanding of the phase-coherent transport processes in TiSe2.
@article{arxiv.2411.13488,
title = {Evidence of anisotropic three-dimensional weak-localization in TiSe$_{2}$ nanoflakes},
author = {Xiaocui Wang and Yang Yang and Yongkai Li and Guangtong Liu and Junxi Duan and Zhiwei Wang and Li Lu and Fan Yang},
journal= {arXiv preprint arXiv:2411.13488},
year = {2026}
}