Abstract Electrical magnetochiral anisotropy (EMCA) refers to the chirality- and current-dependent non- linear magnetoresistance in chiral conductors and is commonly interpreted in a semiclassical picture. In this work, we reveal a quantum geometry origin of EMCA using a chiral rectangular lattice model that resembles a chiral organic conductor (DM-EDT-TTF)2ClO4 studied for EMCA recently and exhibits symmetry-protected Dirac bands similar to those of graphene. Compared to the semiclassi- cal term, we find that Dirac states contribute significantly to EMCA via the quantum metric when Fermi energy is close to the Dirac point. Besides, we discover that a topological insulator state can emerge once spin-orbit coupling (SOC) is added to our chiral model lattice. Our work paves a path toward understanding quantum geometry in the magnetotransport of chiral materials.

Yiyang Jiang

Qinyan Yi

Binghai Yan

2D Materials

2D MATERIALS 是一本多学科、纯电​​子期刊，致力于发表最高质量和影响力的基础和应用研究，涵盖石墨烯和相关二维材料的各个方面。

2D Materials is a multidisciplinary electronic journal dedicated to publishing high-quality and impactful fundamental and applied research covering all aspects of graphene and related two-dimensional materials.

《2D Materials》是一本多学科的电子期刊，专注于发表高质量和高影响力的基础与应用研究，涵盖石墨烯及相关二维材料的各个方面。

Category	Quartile
材料科学	3
材料科学, 材料科学综合	3

Electrical magnetochiral anisotropy and quantum metric in chiral conductors

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