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Teaching Staff

Professor XIE, Maohai

Professor XIE, Maohai

Professor, Department of Physics, Faculty of Science, HKU

B.Eng. Tianjin; M.Sc. Chinese Acad of Sc; Ph.D. Lond; DIC

  • 2859 7945
  • 2559 9152
  • Room 415C, CYM Physics Building, The University of Hong Kong, Pokfulam Road, Hong Kong

Current Research

  • Experimental Condensed Matter and Material Science Group: Materials Science - Experimental Surface Science
    • The surface science laboratory aims at understanding the processes and properties that occur at the boundary of materials - surface.
      Current researches focus on the growth and surface characterizations of low-dimensional materials, such as transition-metal dichalcogenides and their hetero-structures.
      We carry out molecular beam epitaxy (MBE) and surface studies of ultrathin layers MBE is one of the most versatile techniques to grow materials with precise control. It allows fabrication of artificial structures by combining different materials to form the so-called "quantum wells" and "superlattices". Quantum effects and new concepts in material sciences are thus explored for modern device applications. By using STM/S and UPS, we characterize the atomic and electronic structures of film surfaces. The latter are important for the understanding various quantum effects at atomic scale.


Research Interest

  • Experimental Condensed Matter Physics
  • Surface and Materials Science
  • Molecular-beam Epitaxy
  • Scanning Tunneling Microscopy
  • Electron Diffraction
  • Photoelectron Spectroscopy


Representative Publications

  • "One-dimensional phosphorus chain and two-dimensional blue phosphorene grown on Au (111) by molecular-beam epitaxy", J.P. Xu, J.Q. Zhang, H. Tian, H. Xu, W.K. Ho, M.H. XiePhys. Rev. Mater.1, 061002(R)(2017)
  • "Inversion Domain Boundary Induced Stacking and Bandstructure Diversity in Bilayer MoSe2", J.H. Hong, C. Wang, H.J. Liu, X.B. Ren, J.L. Chen, G. Wang, J.F. Jia, M.H. Xie, C.H. Jin, W. Ji, J. Yuan, Z. Zhang, Nano Letter17, 11, 6653-6660 (2017)
  • "Quantum effects and phase tuning in epitaxial hexagonal and monoclinic MoTe2 monolayers”, J. Chen, G.Y. Wang, Y.A. Tang, H. Tian, J. Xu, X.Q. Dai, H. Xu, J.F. Jia, W.K. Ho, M.H. XieACS Nano11, 3282 (2017)
  • “Observation of intervalley quantum interference in epitaxial monolayer tungsten diselenide”, H.J. Liu, J.L. Chen, H.Y. Yu, F. Yang, L. Jiao, G.B. Liu, W.K. Ho, C.L. Gao, J.F. Jia, W. Yao, M.H. XieNat. Comm.6, 8180 (2015)
  • “Line and point defects in MoSe2 bilayer studied by scanning tunneling microscopy and spectroscopy”, H.J. Liu, H. Zheng, F. Yang, L. Jiao, J.L. Chen, W.K. Ho, C.L. Gao, J.F. Jia, M.H. XieACS Nano.9, 6619 (2015)
  • “Molecular-beam epitaxy of monolayer and bilayer WSe2: a scanning tunneling microscopy / spectroscopy study and deduction of exciton binding energy”, H.J. Liu, L. Jiao, L. Xie, F. Yang, J.L. Chen, W.K. Ho, C.L. Gao, J.F. Jia, X.D. Cui, M.H. Xie2D Mater.2, 034004 (2015)
  • “Dense network of one-dimensional midgap metallic modes in monolayer MoSe2 and their spatial undulations”, H.J. Liu, L. Jiao, F. Yang, Y. Cai, X. Wu, W.K. Ho, C.L. Gao, J.F. Jia, N. Wang, H. Fan, W. Yao, M.H. XiePhys. Rev. Lett.113, 066105 (2014)
  • “Anisotropic topological surface states on high-index Bi2Se3 films”, Z.J. Xu, X. Guo, M.Y. Yao, H.T. He, L. Miao, L. Jiao, H.C. Liu, J.N. Wang, D. Qian, J.F. Jia, W.K. Ho, M.H. XieAdv. Mater.25, 1557 (2013)