title: Does the Dirac cone exist in silicene on metal substrates?
abstract: Absence of the Dirac cone due to a strong band hybridization is revealed to be a common feature for epitaxial silicene on metal substrates according to our first-principles calculations for silicene on Ir, Cu, Mg, Au, Pt, Al, and Ag substrates. The destroyed Dirac cone of silicene, however, can be effectively restored with linear or parabolic dispersion by intercalating alkali metal atoms between silicene and the metal substrates, offering an opportunity to study the intriguing properties of silicene without further transfer of silicene from the metal substrates.
authors: 1] State Key Laboratory of Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, P. R. China [2] Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, P. R. China [3] Department of Chemistry and Applied Biosciences, Eidgenössische Technische Hochschule Zürich, CH-8093 Zurich, Switzerland [4] Facoltà di Informatica, Istituto di Scienze Computazionali, Università della Svizzera Italiana, 6900 Lugano, Switzerland.
authors: Ruge
authors: R
authors: Quhe
authors: State Key Laboratory of Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, P. R. China.
authors: Yakun
authors: Y
authors: Yuan
authors: 1] State Key Laboratory of Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, P. R. China [2] Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, P. R. China.
authors: Jiaxin
authors: J
authors: Zheng
authors: State Key Laboratory of Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, P. R. China.
authors: Yangyang
authors: Y
authors: Wang
authors: State Key Laboratory of Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, P. R. China.
authors: Zeyuan
authors: Z
authors: Ni
authors: State Key Laboratory of Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, P. R. China.
authors: Junjie
authors: J
authors: Shi
authors: 1] State Key Laboratory of Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, P. R. China [2] Collaborative Innovation Center of Quantum Matter, Beijing 100871, P. R. China.
authors: Dapeng
authors: D
authors: Yu
authors: 1] State Key Laboratory of Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, P. R. China [2] Collaborative Innovation Center of Quantum Matter, Beijing 100871, P. R. China.
authors: Jinbo
authors: J
authors: Yang
authors: 1] State Key Laboratory of Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, P. R. China [2] Collaborative Innovation Center of Quantum Matter, Beijing 100871, P. R. China.
authors: Jing
authors: J
authors: Lu