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Wei-Feng Tsai
Researcher at National Sun Yat-sen University
Publications - 42
Citations - 2973
Wei-Feng Tsai is an academic researcher from National Sun Yat-sen University. The author has contributed to research in topics: Topological insulator & Topological order. The author has an hindex of 22, co-authored 42 publications receiving 2650 citations. Previous affiliations of Wei-Feng Tsai include University of California, Los Angeles & Purdue University.
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Journal ArticleDOI
Observation of Fermi arc surface states in a topological metal
Su-Yang Xu,Chang Liu,Satya Kushwaha,Raman Sankar,Jason W. Krizan,Ilya Belopolski,Madhab Neupane,Guang Bian,Nasser Alidoust,Tay-Rong Chang,Horng-Tay Jeng,Horng-Tay Jeng,Cheng Yi Huang,Wei-Feng Tsai,Hsin Lin,Pavel Shibayev,Fangcheng Chou,Robert J. Cava,M. Zahid Hasan +18 more
TL;DR: In this paper, angle-resolved photoemission spectroscopy was used to experimentally observe a pair of spin-polarized Fermi arc surface states on the surface of the Dirac semimetal Na3Bi at its native chemical potential.
Journal ArticleDOI
Theory of electron nematic order in LaFeAsO
TL;DR: In this article, a spin S quantum Heisenberg model on the Fe lattice of the rare-earth oxypnictide superconductors was studied, and it was shown that this model exhibits a sequence of two phase transitions: from a high-temperature symmetric pha
Observation of Fermi Arc Surface States in a Topological Metal: A New Type of 2D Electron Gas
Su-Yang Xu,Chang Liu,Satya Kushwaha,Raman Sankar,Jason W. Krizan,I. Belopolski,Madhab Neupane,Guang Bian,N. Alidoust,H.-T. Jeng,Cheng-Yi Huang,Wei-Feng Tsai,Hsin Lin,F. C. Chou,Pavel Shibayev,Robert J. Cava,M. Zahid Hasan +16 more
TL;DR: The systematic results collectively identify a topological phase in a gapless material and observe a pair of spin-polarized Fermi arc surface states on the surface of the Dirac semimetal Na3Bi at its native chemical potential.
Journal ArticleDOI
Gated silicene as a tunable source of nearly 100% spin-polarized electrons
Wei-Feng Tsai,Cheng-Yi Huang,Tay-Rong Chang,Hsin Lin,Horng-Tay Jeng,Horng-Tay Jeng,Arun Bansil +6 more
TL;DR: First-principles calculations are used to show that field-gated silicene possesses two gapped Dirac cones exhibiting nearly 100% spin-polarization, situated at the corners of the Brillouin zone, and a design for asilicene-based spin-filter that should enable the spin- polarization of an output current to be switched electrically, without switching external magnetic fields is proposed.
Journal ArticleDOI
Type-II Symmetry-Protected Topological Dirac Semimetals.
Tay-Rong Chang,Tay-Rong Chang,Su-Yang Xu,Daniel S. Sanchez,Wei-Feng Tsai,Shin-Ming Huang,Guoqing Chang,Chuang-Han Hsu,Guang Bian,Ilya Belopolski,Zhi-Ming Yu,Zhi-Ming Yu,Shengyuan A. Yang,Titus Neupert,Horng-Tay Jeng,Horng-Tay Jeng,Hsin Lin,M. Zahid Hasan +17 more
TL;DR: This Letter proposes the concept of the three-dimensional type-II Dirac fermion and theoretically identifies this new symmetry-protected topological state in the large family of transition-metal icosagenides, MA_{3} (M=V, Nb, Ta; A=Al, Ga, In).