拓扑狄拉克量子材料是一类具有特殊电子能带结构的材料，其中电子表现出奇异的行为，如具有零质量的狄拉克费米子态。这些材料在量子计算和先进电子学领域具有潜在应用。我们的研究旨在通过实验手段，揭示拓扑绝缘体、拓扑半金属等拓扑狄拉克量子材料的物理特性。具体包括研究其电子输运性质、拓扑相变、量子霍尔效应等现象，并探索其在量子计算领域的潜在应用。我们将着重关注这些材料的量子特性、表面态（边缘态）以及其与外界的耦合效应，以期为下一代量子信息技术的发展提供新的材料基础。
代表性工作：
[1] S. Chen#, Pengliang Leng#, A. Konečná, E. Modin, M. Gutierrez-Amigo, E. Vicentini, B. Martín-García, M. Barra-Burillo, I. Niehues, C. Maciel Escudero, X. Y. Xie, L. E. Hueso, E. Artacho, J. Aizpurua, I. Errea, M. G. Vergniory, A. Chuvilin, Faxian Xiu* and R. Hillenbrand*,"Real-space observation of ultraconfined in-plane anisotropic acoustic terahertz plasmon polaritons", Nature Materials, 10.1038/s41563-023-01547-8(2023).
[2] Faxian Xiu,“Atomic heteroepitaxy for topological superconductivity”, Nature Materials 10.1038/s41563-023-01533-0 (2023).
[3] Cheng Zhang, Yi Zhang, Hai-Zhou Lu, X. C. Xie, Faxian Xiu*, “Cycling Fermi arc electrons with Weyl orbits”,Nature Reviews Physics 3, 660-670 (2021).
[4] Xiang Yuan#, Cheng Zhang#, Yi Zhang#, Zhongbo Yan, Tairu Lyu, Mengyao Zhang, Zhilin Li, Chaoyu Song, Minhao Zhao, Pengliang Leng, Mykhaylo Ozerov, Xiaolong Chen, Nanlin Wang, Yi Shi*, Hugen Yan*, Faxian Xiu*,“The discovery of dynamic chiral anomaly in a Weyl semimetal NbAs”, Nature Communications 11, 1259 (2020).
[5] Ce Huang#, Benjamin T. Zhou#, Huiqin Zhang, Bingjia Yang, Ran Liu, Hanwen Wang, Yimin Wan, Ke Huang, Zhiming Liao, Enze Zhang, Shanshan Liu, Qingsong Deng, Yanhui Chen, Xiaodong Han, Jin Zou, Xi Lin, Zheng Han, Yihua Wang, Kam Tuen Law, Faxian Xiu*, “Proximity induced surface superconductivity in Dirac semimetal Cd3As2”, Nature Communications 10, 2217 (2019).(Editors’ Highlight on Condensed-Matter Physics).
[6] Cheng Zhang#, Zhuoliang Ni#, Jinglei Zhang#, Xiang Yuan#, Yanwen Liu, Yichao Zou, Zhiming Liao, Yongping Du, Awadhesh Narayan, Hongming Zhang, Tiancheng Gu, Xuesong Zhu, Li Pi, Stefano Sanvito, Xiaodong Han, Jin Zou, Yi Shi, Xiangang Wan, Sergey Y. Savrasov and Faxian Xiu*, “Ultrahigh conductivity in Weyl semimetal NbAs nanobelts”, Nature Materials 18, 482–488 (2019)
[7] Cheng Zhang#, Yi Zhang#, Xiang Yuan#, Shiheng Lu, Jinglei Zhang, Awadhesh Narayan, Yanwen Liu, Huiqin Zhang, Zhuoliang Ni, Ran Liu, Eun Sang Choi, Alexey Suslov, Stefano Sanvito, Li Pi, Hai-Zhou Lu, Andrew C. Potter, Faxian Xiu*, “Quantum Hall effect based on Weyl orbits in Cd3As2”, Nature 565, 331–336 (2019).
[8] Xiang Yuan#, Zhongbo Yan#, Chaoyu Song#, Mengyao Zhang, Zhilin Li, Cheng Zhang, Yanwen Liu, Weiyi Wang, Minhao Zhao, Zefang Ye, Jiaxiang Wang, Jonathan Ludwig, Xiaoxing Zhang, Cui Shang, Zhengcai Xia, Dmitry Serminov, Xiaolong Chen, Zhong Wang, Hugen Yan*, Faxian Xiu#*, “Chiral Landau levels in Weyl semimetal NbAs with multiple topological carriers”, Nature Communications 9, 1854 (2018).
[9] Cheng Zhang, Awadhesh Narayan, Shiheng Lu, Jinglei Zhang, Xiang Yuan, Yanwen Liu, Ju-Hyun Park, Enze Zhang, Weiyi Wang, Shanshan Liu, Long Cheng, Li Pi, Zhigao Sheng, Stefano Sanvito, Faxian Xiu*,“Evolution of Weyl-orbit and quantum Hall effect in Dirac semimetal Cd3As2”, Nature Communications 8,1272 (2017).
[10] Cheng Zhang, Enze Zhang, Weiyi Wang, Yanwen Liu, Zhi-Gang Chen*, Shiheng Lu, Sihang Liang, Junzhi Cao, Xiang Yuan, Lei Tang, Qian Li, Chao Zhou, Teng Gu, Yizheng Wu, Jin Zou*, Faxian Xiu*, “Room-temperature chiral charge pumping in Dirac semimetal”, Nature Communications 8, 13741 (2017).
[11] Yanwen Liu, Xiang Yuan, Cheng Zhang, Zhao Jin, Awadhesh Narayan, Chen Luo, Zhigang Chen, Lei Yang, Jin Zou, Xing Wu, Stefano Sanvito, Zhengcai Xia, Liang Li, Zhong Wang, Faxian Xiu*, “Zeeman splitting and dynamical mass generation in Dirac semimetal ZrTe5”, Nature Communications 7, 12516 (2016).
[12] Junzhi Cao#, Sihang Liang#, Cheng Zhang#, Yanwen Liu, Junwei Huang, Zhao Jin, Zhi-Gang Chen, Zhijun Wang, Qisi Wang, Jun Zhao, Shiyan Li, Xi Dai, Jin Zou, Zhengcai Xia, Liang Li, Faxian Xiu*, “Landau level splitting in Cd3As2 under high magnetic fields”,Nature Communications 6, 7779 (2015).
[13] Faxian Xiu#*, Liang He#, Yong Wang#, Lina Cheng#, Li-Te Chang, Murong Lang, Guan Huang, Xufeng Kou, Yi Zhou, Xiaowei Jiang, Jin Zou, Alexandros Shailos, and Kang L. Wang.*, “Manipulating surface states in topological insulator nanoribbons”, Nature Nanotechnology 6, 216-221(2011). (1) Highlighted by UCLA newsroom, and reported by UCLA YouTube. (2) Highlighted by Nature Nanotechnology, News and Views by Professor Xue Qikun’s “Nanoelectronics: A topological twist for transistors”,Nature Nanotechnology 6, 197-198 (2011).
