个人信息
南京大学物理学院副教授，博士生导师。2011年本科毕业于南京大学物理学院，2015年获得南京大学物理学博士学位。2015年-2017年在南京大学从事博士后研究。2017年-2021年为美国加州大学河滨分校博士后及项目科学家。2021年入选“国家海外高层次人才引进计划”，2022年正式加入南京大学。在Nature, Science, Physical Review Letters, Nature Communications等国际学术期刊上，以主要作者身份发表论文30余篇，h-index 27，引用超过3000次。受邀担任Physical Review Letters, Physical Review X, Nature Communications, Physical Review B, Nano Letters等期刊审稿人。
研究领域
利用微区光谱学、多维度光电流、低温电子输运等手段研究低维量子材料的光学和电子学性质。近年来，对二维半导体特别是新型莫尔超材料（moiré superlattice）做了较系统和深入的研究，例如激子在极低温强磁场下（磁场~31 T）下的独特性质，以及激子与其他准粒子态之间的相互作用等。以第一作者在Nature发表文章，首次观测到莫尔三激子态（moiré trion），揭示了莫尔激子与电子之间的新奇相互作用。同时作为主要作者，利用电场调制光谱学首次测量到了莫尔激子态（moiré exciton）的吸收谱，为研究莫尔量子态的本征性质提供了实验支持，相关成果发表在Science上。
欢迎对凝聚态物理、凝聚态光学、量子材料等感兴趣的同学加入课题组，每年招收硕士/博士研究生2名。同时课题组还招聘具有相关研究背景的博士后青年学者，提供具有竞争力的薪资待遇。
Selected publications:
01. Elyse Barré, Ouri Karni, Erfu Liu, Aidan L. O’Beirne, Xueqi Chen, Henrique B. Ribeiro, Leo Yu, Bumho Kim, Kenji Watanabe, Takashi Taniguchi, Katayun Barmak, Chun Hung Lui, Sivan Refaely-Abramson, Felipe H. da Jornada, Tony F. Heinz. “Optical absorption of interlayer excitons in transition-metal dichalcogenide heterostructures”. Science 376, 406-410 (2022).
02. Erfu Liu, Elyse Barré, Jeremiah van Baren, Matthew Wilson, Takashi Taniguchi, Kenji Watanabe, Yongtao Cui, Nathaniel M. Gabor, Tony F. Heinz, Yia-Chung Chang, Chun Hung Lui. “Signatures of moiré trions in WSe2/MoSe2 heterobilayers”. Nature 594, 46–50 (2021).
03. Erfu Liu*, Jeremiah van Baren*, Zhengguang Lu, Takashi Taniguchi, Kenji Watanabe, Dmitry Smirnov, Yia-Chung Chang, Chun Hung Lui. “Exciton-polaron Rydberg states in monolayer MoSe2 and WSe2”. Nature Communications 12, 6131 (2021).
04. Erfu Liu, Takashi Taniguchi, Kenji Watanabe, Nathaniel M. Gabor, Yong-Tao Cui, Chun Hung Lui.“Excitonic and valley-polarization signatures of fractional correlated phases in a WSe2/WS2 moiré superlattice”. Physical Review Letters 127, 037402 (2021).
05. Erfu Liu*, Jeremiah van Baren*, Ching-Tang Liang, Takashi Taniguchi, Kenji Watanabe, Nathaniel M. Gabor, Yia-Chung Chang, Chun Hung Lui. “Multipath optical recombination of intervalley dark excitons and trions in monolayer WSe2”. Physical Review Letters 124, 196802 (2020).
06. Erfu Liu*, Jeremiah van Baren*, Takashi Taniguchi, Kenji Watanabe, Yia-Chung Chang, Chun Hung Lui. “Landau-quantized excitonic absorption and luminescence in a monolayer valley semiconductor”. Physical Review Letters 124, 097401 (2020).
07. Erfu Liu, Jeremiah van Baren, Zhengguang Lu, Mashael M. Altaiary, Takashi Taniguchi, Kenji Watanabe, Dmitry Smirnov, Chun Hung Lui. “Gate tunable dark trions in monolayer WSe2”. Physical Review Letters 123, 027401 (2019).
08. Erfu Liu, Jeremiah van Baren, Takashi Taniguchi, Kenji Watanabe, Yia-Chung Chang, Chun Hung Lui. “Valley-selective chiral phonon replicas of dark excitons and trions in monolayer WSe2”. Physical Review Research 1, 032007(R) (2019).
09. Erfu Liu, Mingsheng Long, Junwen Zeng, Wei Luo, Yaojia Wang, Yiming Pan, Wei Zhou, Baigeng Wang, Weida Hu, Zhenhua Ni, Yumeng You, Xueao Zhang, Shiqiao Qin, Yi Shi, Kenji Watanabe, Takashi Taniguchi, Hongtao Yuan, Harold Y Hwang, Yi Cui, Feng Miao, Dingyu Xing. “High Responsivity Phototransistors Based on Few-Layer ReS2 for Weak Signal Detection”. Advanced Functional Materials 26, 1938-1944 (2016).
10. Erfu Liu*, Yajun Fu*, Yaojia Wang, Yanqing Feng, Huimei Liu, Xiangang Wan, Wei Zhou, Baigeng Wang, Lubin Shao, Ching-Hwa Ho, Ying-Sheng Huang, Zhengyi Cao, Laiguo Wang, Aidong Li, Junwen Zeng, Fengqi Song, Xinran Wang, Yi Shi, Hongtao Yuan, Harold Y. Hwang, Yi Cui, Feng Miao & Dingyu Xing. “Integrated digital inverters based on two-dimensional anisotropic ReS2 field-effect transistors”. Nature Communications 6, 6991 (2015).