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Realization of Stable Ferromagnetic Order in Topological Insulator: Codoping Enhanced Magnetism in 4f Transition Metal Doped Bi2Se3
Bei Deng, Yiou Zhang, S. B. Zhang +3
The realization of long range and insulating ferromagnetic states in topological insulator (TI) has been a pressing issue since its discovery. Only recently, such state was achieve…
Surface energy calculations from Zinc blende (111)/(-1-1-1) to Wurtzite (0001)/(000-1):a study of ZnO and GaN
Jingzhao Zhang, Yiou Zhang, Kinfai Tse +3
The accurate absolute surface energies of (0001)/(000-1) surfaces of wurtzite structures are crucial in determining the thin film growth mode of important energy materials. However…
Induced effects by the substitution of Zn in Cu2ZnSnX4 (X = S and Se)
Guohua Zhong, Kinfai Tse, Yiou Zhang +7
Based on the density functional theory with hybrid functional approach, we have studied the structural and thermodynamic stabilities of Cu2MSnX4 (M = Zn, Mg, and Ca; X = S and Se)…
Surfactant Antimony enhanced Indium incorporation on InGaN (000-1) surface: a DFT study
Yiou Zhang, Junyi Zhu
InGaN is an ideal alloy system for optoelectronic devices due its tunable band gap. Yet high-quality InGaN requires high In concentration, which is a challenging issue that limits…
A novel strategy to control defects and secondary phases of CZTS by surfactant Potassium
Yiou Zhang, Kinfai Tse, Xudong Xiao +1
Cu2ZnSnS4 (CZTS) is a promising photovoltaic absorber material with earth abundant and nontoxic elements. However, the detrimental native defects and secondary phases of CSTS will…
Pseudo-Hydrogen Passivation_A Novel Way to Calculate Absolute Surface Energy of Zinc Blende (111) Surface
Yiou Zhang, Jingzhao Zhang, Kinfai Tse +3
Determining accurate absolute surface energies for polar surfaces of semiconductors has been a great challenge in decades. Here, we propose pseudo-hydrogen passivation to calculate…