258 citations · 508 across the 12 of their papers we have counts for
12 papers
Electronic Noise of a Single Skyrmion
Kang Wang, Yiou Zhang, Vineetha Bheemarasetty +2
To enable the practical use of skyrmion-based devices, it is essential to achieve a balance between energy efficiency and thermal stability, while also ensuring reliable electrical…
Stability of wurtzite semi-polar surfaces: algorithms and practices
Yiou Zhang, Jingzhao Zhang, Junyi Zhu
A complete knowledge of absolute surface energies with any arbitrary crystal orientation is important for the improvements of semiconductor devices because it determines the equili…
Quasicrystalline 30° Twisted Bilayer Graphene as an Incommensurate Superlattice with Strong Interlayer Coupling
Wei Yao, Eryin Wang, Changhua Bao +9
The interlayer coupling can be used to engineer the electronic structure of van der Waals heterostructures (superlattices) to obtain properties that are not possible in a single ma…
Hydrogen Surfactant Assisted Coherent Growth of GaN on ZnO Substrate
Jingzhao Zhang, Yiou Zhang, Kinfai Tse +1
Heterostructures of wurtzite based devices have attracted great research interests since the tremendous success of GaN in light emitting diodes (LED) industry. Among the possible h…
Defect Properties of Na and K in Cu2ZnSnS4 from Hybrid Functional Calculation
Kinfai Tse, Manhoi Wong, Yiou Zhang +3
In-growth or post-deposition treatment of (CZTS) absorber layer had led to improved photovoltaic efficiency, however, the underlying physical mechanism of such im…
Step Stone Effect: A sp anti-bonding Mediated Long-Range Ferromagnetism in Cr-doped Carrier-Free Bi2Te3
Chunkai Chan, Xiaodong Zhang, Yiou Zhang +4
Despite the recent success in the realization of the quantum anomalous Hall effect, the underlying physical mechanism of the long range Ferromagnetism is still unclear. Based on ou…
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…