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Yanbang Chu 《中国物理 B》2022,31(10):107201-107201
Magnetoresistance ({MR}) provides rich information about Fermi surface, carrier scatterings, and exotic phases for a given electronic system. Here, we report a study of the magnetoresistance for the metallic states in twisted double bilayer graphene (TDBG). We observe quadratic magnetoresistance in both Moiré valence band (VB) and Moiré conduction band (CB). The scaling analysis shows validity of Kohler's rule in the Moiré valence band. On the other hand, the quadratic magnetoresistance appears near the halo structure in the Moiré conduction band, and it violates Kohler's rule, demonstrating the {MR} scaling related to band structure in TDBG. We also propose an alternative scaling near the halo structure. Further analysis implies that the observed quadratic magnetoresistance and alternative scaling in conduction band are related to the halo boundary. Our results may inspire investigation on {MR} in twisted 2D materials and provide new knowledge for {MR} study in condensed matter physics. 相似文献
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吴帆帆 李璐 徐巧玲 刘乐 袁亚龙 赵交交 黄智恒 昝晓洲 Kenji Watanabe Takashi Taniguchi 时东霞 冼乐德 杨威 杜罗军 张广宇 《中国物理快报》2023,(4):84-93
Moiré superlattices have emerged as a highly controllable quantum platform for exploration of various fascinating phenomena,such as Mott insulator states,ferroelectric order,unconventional superconductivity and orbital ferromagnetism.Although remarkable progress has been achieved,current research in moiré physics has mainly focused on the single species properties,while the coupling between distinct moiré quantum phenomena remains elusive.Here we demonstrate,for the first time,the strong couplin... 相似文献
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