Z. Fang

Publications275
h-index78
Citations36,684
Highly Influential Citations607
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Topological insulators in Bi2Se3, Bi2Te3 and Sb2Te3 with a single Dirac cone on the surface
Topological insulators are new states of quantum matter in which surface states residing in the bulk insulating gap of such systems are protected by time-reversal symmetry. The study of such states…
Experimental Realization of a Three-Dimensional Topological Insulator, Bi2Te3
TLDR
The results establish that Bi2Te3 is a simple model system for the three-dimensional topological insulator with a single Dirac cone on the surface, and points to promising potential for high-temperature spintronics applications.
Dirac semimetal and topological phase transitions in A 3 Bi ( A = Na , K, Rb)
Three-dimensional (3D) Dirac point, where two Weyl points overlap in momentum space, is usually unstable and hard to realize. Here we show, based on the first-principles calculations and effective…
Three-dimensional Dirac semimetal and quantum transport in Cd3As2
Based on the first-principles calculations, we recover the silent topological nature of Cd3As2, a well known semiconductor with high carrier mobility. We find that it is a symmetry-protected…
Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator
TLDR
The observation of the quantum anomalous Hall (QAH) effect in thin films of chromium-doped (Bi,Sb)2Te3, a magnetic topological insulator shows a plateau in the Hall resistance as a function of the gating voltage without any applied magnetic fields, signifying the achievement of the QAH state.
Model Hamiltonian for topological insulators
In this paper we give the full microscopic derivation of the model Hamiltonian for the three-dimensional topological insulators in the Bi(2)Se(3) family of materials (Bi(2)Se(3), Bi(2)Te(3) and…
Weyl Semimetal Phase in Noncentrosymmetric Transition-Metal Monophosphides
Based on first-principle calculations, we show that a family of nonmagnetic materials including TaAs, TaP, NbAs, and NbP are Weyl semimetals (WSM) without inversion centers. We find twelve pairs of…
Discovery of a Three-Dimensional Topological Dirac Semimetal, Na3Bi
TLDR
Na3Bi is established as a model system for 3D TDSs, which can serve as an ideal platform for the systematic study of quantum phase transitions between rich topological quantum states, and the robustness of 3D Dirac fermions in Na3Bi against in situ surface doping is demonstrated.
A stable three-dimensional topological Dirac semimetal Cd3As2.
TLDR
By performing angle-resolved photoemission spectroscopy, a pair of 3D Dirac fermions in Cd3As2 are directly observed, proving that it is a model 3D TDS and by in situ doping it is able to tune its Fermi energy, making it a flexible platform for exploring exotic physical phenomena.
Quantized Anomalous Hall Effect in Magnetic Topological Insulators
TLDR
A realization of a quantum anomalous Hall system is proposed by magnetically doping thin films of three-dimensional topological insulators and calculating the effects of various dopants and film thicknesses, which are predicted to have long-range ferromagnetic order, potentially joining dilute magnetic semiconductors as candidates for spintronic applications.
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