At least four two- or quasi-one- dimensional allotropes and a mixture of them were theoretically predicted or experimentally observed for low-dimensional Te, namely the α, \b{eta}, γ, δ and chiral-α+δ phases. Among them the γ and α phases were found the most stable phases for monolayer and thicker layers, respectively. Here, we found two novel low-dimensional phases, namely the ε and ζ phases. The ζ phase is over 29 meV/Te more stable than and the ε phase shows comparable stability with the most stable monolayer γ phase. The energetic difference between the ζ and α phases reduces with respect to the increased layer thickness and vanishes at the four-layer (12-sublayer) thickness, while this thickness increases under change doping. Both ε and ζ phases are metallic chains and layers, respectively. The ζ phase, with very strong interlayer coupling, shows quantum well states in its layer-dependent bandstructures. These results provide significantly insight into the understanding of polytypism in Te few-layers and may boost tremendous studies on properties of various few-layer phases.
Original mechanism of transformation from soft metallic (sp2/sp3) C12 to ultra-dense and ultra-hard (sp3) semi-conducting C12: Crystal chemistry and DFT characterizations
Engineering Excitons through Polymorphism and Dimensional Confinement in Low-Dimensional Tellurium
Federal University of Goi\'as, Institute of Physics, Campus Samambaia, 74960600 Goi\ ania, Brazil；Institute of Physics, Computational Materials Laboratory, University of Bras \' i lia, Bras \' i lia, 70910-900, Brazil
Direct observation of structural phase transformations during continuous phosphorus deposition on Cu(111)
Institute of Physical Engineering, Brno University of Technology（Brno理工大学物理工程学院）；CEITEC BUT, Brno University of Technology（Brno理工大学CEITEC中心）；Department of Mechanical Engineering, Materials Science Program, Colorado School of Mines（科罗拉多矿业大学机械工程系材料科学项目）；Department of Materials Science and Engineering, Virginia Polytechnic Institute and State University（弗吉尼亚理工大学材料科学与工程系）
Thickness-dependent degradation and optical access in epitaxial 2H-MoTe2 protected by metallic capping layers
University of Lodz（罗兹大学）；University of Warsaw（华沙大学）；Military University of Technology（军事理工大学）；Polish Academy of Sciences, Institute of Physics（波兰科学院物理研究所）；Ensemble3 Centre of Excellence（卓越中心 Ensemble3）
