Evolution of the linear band dispersion of monolayer and bilayer germanene on Cu(111)

Literature Information

Publication Date 2017-07-31
DOI 10.1039/C7CP03597G
Impact Factor 3.676
Authors

Fengping Li, Wei Wei, Xingshuai Lv, Baibiao Huang, Ying Dai


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Abstract

The structural and electronic properties of germanene are always strongly modulated by the hybridization effects with metal substrates. In order to see what will happen when a buffer layer is introduced in-between germanene and metal substrates, we study the structural and electronic properties of the recently synthesized monolayer and bilayer germanene on Cu(111) though first-principles calculations. Our results show that the monolayer germanene on Cu(111) displays a nearly flat configuration and interface states form between the Ge pz and Cu sp-like states, with the Ge π states maintaining the Dirac character. For bilayer germanene on Cu(111), interactions with Cu(111) are reduced due to germanene inter-layer interactions, which is beneficial for the transfer of germanene. In comparison with the bottom germanene layer, the Ge pz character of the upper germanene layer can be maintained near the Fermi level. Since the linear band dispersion is at the heart of the novel quantum phenomenon, our results will facilitate research into the synthesis, extraordinary quantum properties, and applications based on the two-dimensional (2D) germanium system.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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