低维超导与拓扑材料的物性，以及新的量子材料的探索。具体包括：
（1）拓扑绝缘体及相关量子体系中的电输运及自旋输运特性；
（2）异质结构中宏观量子态间的相互作用（如超导和铁磁的相互作用、超导和拓扑的相互作用等）；
（3）低维体系中的超导特性研究。等等。
（1） 在二维极限下的界面超导方面：首次在二维超导中发现和证实了量子Griffiths相变行为；发现一种新的二维超导体，为类石墨烯结构的人工的二维晶格：外延生长在GaN衬底上的Ga双原子层；我们首次对STO衬底上的单层FeSe开展了电输运与迈斯纳效应等测量，证实了其为最薄的高温超导体。（2）在拓扑新材料方面，我们系统研究了三维狄拉克半金属Cd3As2的电输运特性；在此基础上用硬点接触的方法在Cd3As2表面观测到点接触区域的超导，该超导有可能是拓扑超导。（3）在拓扑绝缘体的电输运领域取得了一系列重要进展：如首次定量引入电子-电子相互作用的量子修正，率先在拓扑绝缘体和超导相互作用的实验中取得突破，首次开展了拓扑绝缘体超晶格的量子输运特性和拓扑绝缘体异质结的物性实验等研究。（4）在纳米超导的近邻效应方面：在实验上观测到单晶铁磁（钴和镍）纳米线与超导纳米电极间的长程铁磁超导相互作用和在相变点的电阻异常峰，该结果为当前新兴前沿领域铁磁-超导纳米异质结构物性研究中的重大突破，进一步推动了该领域的发展；在实验上研究了单晶金属（金）纳米线中超导长程近邻效应诱导的超导特性，发现了新的窄能隙的超导态和在磁场引发的超导相变过程中的微分磁阻振荡行为等。（5）在一维超导方面：实验发现单晶半金属铋纳米线在低温下（1K附近）显示超导特性，并观测到磁场下的量子振荡行为，结果表明在超导温度以下铋纳米线的表面存在奇异的超导-金属共存态等。
Selective Publications(First/Corresponding Author)
Chao Yang#, Yi Liu#, Yang Wang, Liu Feng, Qianmei He, Jian Sun, Yue Tang, Chunchun Wu, Jie Xiong*, Wanli Zhang, Xi Lin, Hong Yao, Haiwen Liu, Gustavo Fernandes, Jimmy Xu, James M. Valles Jr.*, Jian Wang*, Yanrong Li. “Intermediate bosonic metallic state in the superconductor-insulator transition” Science 366, 1505-1509 (2019) (The paper was accompanied with a perspective article: “Free at last: Bose metal uncaged” Science 366, 1450-1451 (2019))
Ying Xing, Hui-Min Zhang, Hai-Long Fu, Haiwen Liu, Yi Sun, Jun-Ping Peng, Fa Wang, Xi Lin, Xu-Cun Ma, Qi-Kun Xue, Jian Wang, X. C. Xie. “Quantum Griffiths singularity of superconductor-metal transition in Ga thin films” Science 350, 542-545 (2015)(The paper was accompanied with a perspective article: “Randomness rules” Science 350, 509 (2015))
He Wang, Huichao Wang, Haiwen Liu, Hong Lu, Wuhao Yang, Shuang Jia, Xiong-Jun Liu, X. C. Xie, Jian Wei and Jian Wang. 'Observation of superconductivity induced by a point contact on 3D Dirac semimetal Cd3As2 crystals', Nature Materials 15, 38–42 (2016)
Cheng Chen, Kun Jiang, Yi Zhang, Chaofei Liu, Yi Liu, Ziqiang Wang and Jian Wang*. "Atomic line defects and zero-energy end states in monolayer Fe(Te,Se) high-temperature superconductors" Nature Physics 16, 536–540 (2020)
Jian Wang, Meenakshi Singh, Mingliang Tian, Nitesh Kumar, Bangzhi Liu, Chuntai Shi, J. K. Jain, Nitin Samarth, T. E. Mallouk, and M. H. W. Chan, “Interplay between superconductivity and ferromagnetism in crystalline nanowires”, Nature Physics 6, 389 (2010) (The paper was accompanied with a News and Views article: “Supercurrents in ferromagnets” Nature Physics 6, 329 (2010))
Huichao Wang#, Haiwen Liu#, Yanan Li, Yongjie Liu, Junfeng Wang, Jun Liu, Ji-Yan Dai, Yong Wang, Liang Li, Jiaqiang Yan, David Mandrus, X. C. Xie* and Jian Wang*. “Discovery of log-periodic oscillations in ultraquantum topological materials” Science Advances 4, eaau5096 (2018)
Chaofei Liu#, Cheng Chen#, Xiaoqiang Liu, Ziqiao Wang, Yi Liu, Shusen Ye, Ziqiang Wang, Jiangping Hu and Jian Wang*. "Zero-energy bound states in the high-temperature superconductors at the two-dimensional limit" Science Advances 6, eaax7547 (2020)
Yi Liu#, Ziqiao Wang#, Pujia Shan, Yue Tang, Chaofei Liu, Cheng Chen, Ying Xing, Qingyan Wang, Haiwen Liu*, Xi Lin, X. C. Xie & Jian Wang*. “Anomalous quantum Griffiths singularity in ultrathin crystalline lead films” Nature Communications 10, 3633 (2019)
Yanan Li#, Qiangqiang Gu#, Chen Chen#, Jun Zhang, Qin Liu, Xiyao Hu, Jun Liu, Yi Liu, Langsheng Ling, Mingliang Tian, Yong Wang, Nitin Samarth, Shiyan Li, Tong Zhang*, Ji Feng*, and Jian Wang*. “Nontrivial superconductivity in topological MoTe2−xSx crystals” PNAS 115, 9503 (2018)
Yi Liu, Ziqiao Wang, Xuefeng Zhang, Chaofei Liu, Yongjie Liu, Zhimou Zhou, Junfeng Wang, Qingyan Wang, Yanzhao Liu, Chuanying Xi, Mingliang Tian, Haiwen Liu, Ji Feng, X.C. Xie, and Jian Wang. 'Interface-Induced Zeeman-Protected Superconductivity in Ultrathin Crystalline Lead Films', Physical Review X 8, 021002 (2018)
Yanfei Zhao, Haiwen Liu, Chenglong Zhang, Huichao Wang, Junfeng Wang, Ziquan Lin, Ying Xing, Hong Lu, Jun Liu, Yong Wang, Scott M. Brombosz, Zhili Xiao, Shuang Jia, X. C. Xie, and Jian Wang. 'Anisotropic Fermi Surface and Quantum Limit Transport in High Mobility Three-Dimensional Dirac Semimetal Cd3As2', Physical Review X 5, 031037 (2015)
Chaofei Liu#, Ziqiao Wang#, Yi Gao#, Xiaoqiang Liu, Yi Liu, Qiang-Hua Wang*, Jian Wang*. “Spectroscopic Imaging of Quasiparticle Bound States Induced by Strong Nonmagnetic Scatterings in One-Unit-Cell FeSe/SrTiO3” Physical Review Letters 123, 036801 (2019)
Hui-Min Zhang, Yi Sun, Wei Li, Jun-Ping Peng, Can-Li Song, Ying Xing, Qinghua Zhang, Jiaqi Guan, Zhi Li, Yanfei Zhao, Shuaihua Ji, Lili Wang, Ke He, Xi Chen, Lin Gu, Langsheng Ling, Mingliang Tian, Lian Li, X.C. Xie, Jianping Liu, Hui Yang, Qi-Kun Xue,Jian Wang, and Xucun Ma, " Detection of a Superconducting Phase in a Two-Atom Layer of Hexagonal Ga Film Grown on Semiconducting GaN(0001)", Physical Review Letters 114, 107003 (2015) (Editors’ Suggestion)
Jian Wang, Chuntai Shi, Mingliang Tian, Qi Zhang, Nitesh Kumar, J. K. Jain, T. E. Mallouk, and M. H. W. Chan, “Proximity-induced superconductivity in nanowires: minigap state and differential magnetoresistance oscillations”, Physical Review Letters 102, 247003 (2009) (The article was selected for the July 6, 2009 issue of Virtual Journal of Nanoscale Science & Technology and for the July 1, 2009 issue of Virtual Journal of Applications of Superconductivity.)
Cui Ding#, Guanming Gong#, Yanzhao Liu#, Fawei Zheng, Zhiyu Zhang, Haohao Yang, Zhe Li, Ying Xing, Jun Ge, Ke He, Wei Li, Ping Zhang, Jian Wang*, Lili Wang*, Qi-Kun Xue*. “Signature of Superconductivity in Orthorhombic CoSb Monolayer Films on SrTiO3(001)” ACS Nano 13, 10434−10439 (2019)
Jianping Shi, Xuexian Chen, Liyun Zhao, Yue Gong, Min Hong, Yahuan Huan, Zhepeng Zhang, Pengfei Yang, Yong Li, Qinghua Zhang, Qing Zhang, Lin Gu, Huanjun Chen*, Jian Wang*, Shaozhi Deng, Ningsheng Xu, Yanfeng Zhang*. “Chemical Vapor Deposition Grown Wafer‐Scale 2D Tantalum Diselenide with Robust Charge‐Density‐Wave Order” Advanced Materials 30, 1804616 (2018)
ZHANG Wen-Hao, SUN Yi, ZHANG Jin-Song, LI Fang-Sen, GUO Ming-Hua, ZHAO Yan-Fei, ZHANG Hui-Min, PENG Jun-Ping, XING Ying, WANG Hui-Chao, FUJITA Takeshi, HIRATA Akihiko, LI Zhi, DING Hao, TANG Chen-Jia, WANG Meng, WANG Qing-Yan, HE Ke, JI Shuai-Hua, CHEN Xi, WANG Jun-Feng, XIA Zheng-Cai, LI Liang, WANG Ya-Yu, WANG Jian, WANG Li-Li, CHEN Ming-Wei, XUE Qi-Kun, MA Xu-Cun,"Direct Observation of High-Temperature Superconductivity in One-Unit-Cell FeSe Films", Chinese Physical Letters 31, 017401 (2014) (Highlighted in Editors' Choice in Science: Science 343, 230 (2014) and selected as a Highly Cited Paper by Web of Science)