Yanchao Wang

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We report a high-pressure orthorhombic KHg 2-type polymorph ͑space group Imma, 4 f.u./cell͒ of MgB 2 stable above 190 GPa predicted through ab-initio evolutionary simulations. The formation of this new phase results from the strong out-of-plane distortions of the two-dimensional honeycomb boron sublattice of the low-pressure AlB 2-type structure creating a(More)
A novel neuron data model with a neuron domain specific query language is proposed in this paper. It is inspired by the project NeuronBank [14]. This data model is composed of five components: neuron data structure, constraints, operations, domain-specific query language (NeuroQL), and controlled vocabulary. It can capture and enforce more domain semantics(More)
Recent discovery of high-temperature superconductivity (Tc = 190 K) in sulfur hydrides at megabar pressures breaks the traditional belief on the Tc limit of 40 K for conventional superconductors, and opens up the doors in searching new high-temperature superconductors in compounds made up of light elements. Selenium is a sister and isoelectronic element of(More)
The search for high-temperature superconductors has been focused on compounds containing a large fraction of hydrogen, such as SiH4(H2)2, CaH6 and KH6. Through a systematic investigation of yttrium hydrides at different hydrogen contents using an structure prediction method based on the particle swarm optimization algorithm, we have predicted two new(More)
We propose the use of thin Ag film deposition to remedy the degradation of near-infrared (NIR) absorption of black Si caused by high-temperature thermal annealing. A large amount of random and irregular Ag nanoparticles are formed on the microstructural surface of black Si after Ag film deposition, which compensates the degradation of NIR absorption of(More)