Canton, New York, United States of America
  •  1
    Signature of type-II Weyl semimetal phase in MoTe 2
    with J. Jiang, Z. K. Liu, Y. Sun, H. F. Yang, C. R. Rajamathi, Y. P. Qi, L. X. Yang, C. Chen, H. Peng, S. Z. Sun, S. K. Mo, I. Vobornik, J. Fujii, S. S. P. Parkin, C. Felser, B. H. Yan, and Y. L. Chen
    © The Author 2017.Topological Weyl semimetal, a new state of quantum matter, has sparked enormous research interest recently. Possessing unique Weyl fermions in the bulk and Fermi arcs on the surface, TWSs offer a rare platform for realizing many exotic physical phenomena. TWSs can be classified into type-I that respect Lorentz symmetry and type-II that do not. Here, we directly visualize the electronic structure of MoTe 2, a recently proposed type-II TWS. Using angle-resolved photoemission spec…Read more
  • Distinct Electronic Structure for the Extreme Magnetoresistance in YSb
    with J. He, C. Zhang, N. J. Ghimire, T. Liang, C. Jia, J. Jiang, S. Tang, S. Chen, Y. He, S. K. Mo, M. Hashimoto, D. H. Lu, B. Moritz, T. P. Devereaux, Y. L. Chen, J. F. Mitchell, and Z. X. Shen
    © 2016 American Physical Society.An extreme magnetoresistance has recently been observed in several nonmagnetic semimetals. Increasing experimental and theoretical evidence indicates that the XMR can be driven by either topological protection or electron-hole compensation. Here, by investigating the electronic structure of a XMR material, YSb, we present spectroscopic evidence for a special case which lacks topological protection and perfect electron-hole compensation. Further investigations rev…Read more
  •  1
    © 2016 IOP Publishing Ltd.Few-layer thick MoSe2 and WSe2 possess non-trivial spin textures with sizable spin splitting due to the inversion symmetry breaking embedded in the crystal structure and strong spin-orbit coupling. We report a spin-resolved photoemission study of MoSe2 and WSe2 thin film samples epitaxially grown on a bilayer graphene substrate. We only found spin polarization in the single-and trilayer samples-not in the bilayer sample-mostly along the out-of-plane direction of the sam…Read more
  •  12
    Electronic Structure, Surface Doping, and Optical Response in Epitaxial WSe 2 Thin Films
    with Y. Zhang, M. M. Ugeda, C. Jin, S. F. Shi, A. J. Bradley, A. Martín-Recio, H. Ryu, J. Kim, S. Tang, Y. Kim, B. Zhou, Y. Chen, F. Wang, M. F. Crommie, Z. Hussain, Z. X. Shen, and S. K. Mo
    © 2016 American Chemical Society.High quality WSe2 films have been grown on bilayer graphene with layer-by-layer control of thickness using molecular beam epitaxy. The combination of angle-resolved photoemission, scanning tunneling microscopy/spectroscopy, and optical absorption measurements reveal the atomic and electronic structures evolution and optical response of WSe2/BLG. We observe that a bilayer of WSe2 is a direct bandgap semiconductor, when integrated in a BLG-based heterostructure, th…Read more
  •  1
    Magnetic effects in sulfur-decorated graphene
    with S. A. Cybart, S. J. Shin, S. Kim, K. Kim, T. G. Rappoport, S. M. Wu, C. Jozwiak, A. V. Fedorov, S. K. Mo, D. H. Lee, B. I. Min, E. E. Haller, R. C. Dynes, A. H. Castro Neto, and A. Lanzara
    © 2016, Nature Publishing Group. All rights reserved.The interaction between two different materials can present novel phenomena that are quite different from the physical properties observed when each material stands alone. Strong electronic correlations, such as magnetism and superconductivity, can be produced as the result of enhanced Coulomb interactions between electrons. Two-dimensional materials are powerful candidates to search for the novel phenomena because of the easiness of arranging…Read more