Zobrazeno 1 - 10
of 1 551
pro vyhledávání: '"MacDonald, P. H."'
We examine the viability of twisted bilayers of group IV and IVB trigonal transition metal dichalcogenides (TMDs) MX$_{2}$ (M$=$Ti, Zr, Hf, Sn and X$=$S, Se, Te) as a moir\'{e} material platform. We show that the low energy conduction band states in
Externí odkaz:
http://arxiv.org/abs/2411.18828
Autor:
Wang, Yimeng, Zhu, Jihang, Burg, G. William, Swain, Anand, Watanabe, Kenji, Taniguchi, Takashi, Zheng, Yuebing, MacDonald, Allan H., Tutuc, Emanuel
We report on a double moir\'e system consisting of four graphene layers, where the top and bottom pairs form small-twist-angle bilayer graphene, and the middle interface has a large rotational mismatch. This system shows clear signatures of two sets
Externí odkaz:
http://arxiv.org/abs/2411.18785
Autor:
Zou, Bo, MacDonald, Allan H.
We show that the ground state of a weakly charged two-dimensional electron-hole fluid in a strong magnetic field is a broken translational symmetry state with interpenetrating lattices of localized vortices and antivortices in the electron-hole-pair
Externí odkaz:
http://arxiv.org/abs/2411.08810
The Pauli exclusion principle combined with interactions between fermions is a unifying basic mechanism that can give rise to quantum phases with spin order in diverse physical systems. Transition-metal ferromagnets, with isotropic ordering respectin
Externí odkaz:
http://arxiv.org/abs/2411.00717
Autor:
Fu, ZhuangEn, Samarawickrama, Piumi I., Ackerman, John, Zhu, Yanglin, Mao, Zhiqiang, Watanabe, Kenji, Taniguchi, Takashi, Wang, Wenyong, Dahnovsky, Yuri, Wu, Mingzhong, Chien, TeYu, Tang, Jinke, MacDonald, Allan H., Chen, Hua, Tian, Jifa
Publikováno v:
Nature Communications 15 (2024) 3630
Effective control of magnetic phases in two-dimensional magnets would constitute crucial progress in spintronics, holding great potential for future computing technologies. Here, we report a new approach of leveraging tunneling current as a tool for
Externí odkaz:
http://arxiv.org/abs/2410.19255
Autor:
Liu, Zhida, Wang, Haonan, Liu, Xiaohui, Ni, Yue, Gao, Frank, Arash, Saba, Kim, Dong Seob, Liu, Xiangcheng, Zeng, Yongxin, Quan, Jiamin, Huang, Di, Watanabe, Kenji, Taniguchi, Takashi, Baldini, Edoardo, MacDonald, Allan H., Shih, Chih-Kang, Yang, Li, Li, Xiaoqin
Many fascinating properties discovered in graphene and transition metal dichalcogenide (TMD) moir\'e superlattices originate from flat bands and enhanced many-body effects. Here, we discover new many-electron excited states in TMD homobilayers. As op
Externí odkaz:
http://arxiv.org/abs/2407.17025
Autor:
Zhang, Fan, Morales-Durán, Nicolás, Li, Yanxing, Yao, Wang, Su, Jung-Jung, Lin, Yu-Chuan, Dong, Chengye, Kim, Hyunsue, Robinson, Joshua A., Macdonald, Allan H., Shih, Chih-Kang
Transition metal dichalcogenide (TMD) twisted homobilayers have been established as an ideal platform for studying strong correlation phenomena, as exemplified by the recent discovery of fractional Chern insulator (FCI) states in twisted MoTe2 and Ch
Externí odkaz:
http://arxiv.org/abs/2406.20036
Publikováno v:
Phys. Rev. Lett. 133, 246607 (2024)
The topological magnetoelectric effect (TME) is a defining property of three-dimensional $\mathbb{Z}_{2}$ topological insulators that was predicted on theoretical grounds more than a decade ago, but has still not been directly measured. In this Lette
Externí odkaz:
http://arxiv.org/abs/2406.11591
The low-energy collective excitations of semiconductors and insulators often couple strongly to light, allowing them to be probed optically. We argue here that in fractional Chern insulators intra-band collective excitations are dark in the sense tha
Externí odkaz:
http://arxiv.org/abs/2406.10709
Autor:
Xie, Tian, Wolf, Tobias M., Xu, Siyuan, Cui, Zhiyuan, Xiong, Richen, Ou, Yunbo, Hays, Patrick, Holleis, Ludwig F, Guo, Yi, Sheekey, Owen I, Patterson, Caitlin, Arp, Trevor, Watanabe, Kenji, Taniguchi, Takashi, Tongay, Seth Ariel, Young, Andrea F, MacDonald, Allan H., Jin, Chenhao
Spin and valley flavor polarization plays a central role in the many-body physics of flat band graphene, with fermi surface reconstructions often accompanied by quantized anomalous Hall and superconducting state observed in a variety of experimental
Externí odkaz:
http://arxiv.org/abs/2405.08074