Giant anisotropic photogalvanic effect in a flexible AsSb monolayer with ultrahigh carrier mobility
Literature Information
Pei Zhao, Jianwei Li, Wei Wei, Qilong Sun, Hao Jin, Baibiao Huang, Ying Dai
Searching for novel two-dimensional (2D) materials with desirable properties is of great significance for the design of next generation nano-devices. In this work, we address the electronic and optoelectronic properties of monolayer AsSb on the basis of density functional theory (DFT) combined with quantum transport simulations. We find three stable phases of monolayer AsSb, that is, the α, γ and ε phases, and all of them show direct bandgaps, which are beneficial in increasing the transition probability of photon-generated electrons and improving the efficiency of photoelectric conversion. In addition, these systems could attain meaningful strain-induced band engineering and a phase transition from semiconductor to metal occurs. It is highly interesting that the monolayer AsSb has an ultrahigh carrier mobility (∼104 cm2 V−1 s−1), which is evidently larger than most of the reported 2D materials. In light of the nonequilibrium Green's function formalism, a linear photogalvanic effect (PGE) is observed along both the zigzag and armchair directions, suggesting that monolayer AsSb exhibits excellent photoresponse in a broad spectrum ranging from ultraviolet to infrared light, which is favorable for serving as a potential outstanding photovoltaic material. Our results highlight that these monolayer AsSb are promising candidates for future applications in electronics and optoelectronics.
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Physical Chemistry Chemical Physics

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.














