Article
Engineering, Electrical & Electronic
Nicolas Roisin, Marie-Stephane Colla, Jean-Pierre Raskin, Denis Flandre
Summary: This study validates first-principles simulations through experimental measurements to accurately predict the Raman shift in silicon due to strain. The simulation considers structural relaxation and calculates the energy of optical phonon modes using density functional perturbation theory. Experimental validation is done using silicon microbeams strained up to 2%, showing good agreement with the simulated results.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Physical
Chen Li, Yabin An, Lei Wang, Kai Wang, Xianzhong Sun, Fangyuan Su, Xiong Zhang, Yanwei Ma
Summary: This study employed first-principles calculations to elucidate the potassiation reaction pathways and phase transformation mechanisms in SnS2, and predicted its high theoretical capacity. The findings provide important guidance for the architectural evolution and potassium storage chemistry in TMDs.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Physics, Applied
Baojuan Xin, Kaixin Zou, Dayong Liu, Shanchuan Liang, Hong Dong, Feng Lu, Cheng Gong, Feng Luo, Wei-Hua Wang
Summary: Constructing a mixed-dimensional graphene/MnF4 van der Waals heterostructure can manipulate carrier doping, bandgap opening, and spin polarization of graphene, offering insights into engineering the spintronic band properties of graphene.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Physical
E. Ozugurlu
Summary: The sol-gel method was used to prepare Zn1-xCdxO nanoparticles with various Cd concentrations, and the structural and optical properties were analyzed experimentally and theoretically. The study showed that the addition of Cd alters the crystal structure of ZnO and significantly affects the band-gap and optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Geological
Linh A. Le, Giang D. Nguyen, Ha H. Bui, Jose E. Andrade
Summary: This paper proposes a theoretical framework that provides links between mechanical responses inside and outside the localisation band, allowing for the quantification of behavior inside the localisation band. The correlation between the thickness of the localisation band and its behavior is shown, bounded by a unique stress-deformation relationship describing the behavior of an idealized zero-thickness localisation band.
Article
Materials Science, Multidisciplinary
Chen-Chen Er, Lutfi K. Putri, Boon-Junn Ng, Jie-Yinn Tang, Nikhil V. Medhekar, Siang-Piao Chai
Summary: Controlling the product selectivity of CO2 photoreduction through allotropism is a promising strategy. In this study, three phosphorus allotropes were modeled as CO2 reduction photocatalysts and their CO2 adsorption behavior was investigated. It was found that each allotrope exhibits different selectivity towards C1 products due to their distinct p-band centers.
MATERIALS TODAY PHYSICS
(2022)
Article
Computer Science, Interdisciplinary Applications
Mingqing Liao, Yong Liu, Fei Zhou, Tianyi Han, Danni Yang, Nan Qu, Zhonghong Lai, Zi-Kui Liu, Jingchuan Zhu
Summary: In this paper, a general and efficient strain-stress method (SSM) is proposed for calculating higher-order elastic constants (HOECs) from first-principles. The SSM significantly reduces the required number of strain modes and improves the convergence against maximum strain. An algorithm and an open source code are provided to accelerate the development of calculation tools for HOECs.
COMPUTER PHYSICS COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Binbin Zhang, Zhuo Mao, Ping Wu
Summary: Two-dimensional fibrous red phosphorene was studied for its gas-sensing capabilities through first-principles calculations, revealing significant changes in electronic structures upon adsorption of NO, NO2, O3, and SO2 molecules, making it suitable for gas sensing applications. The material also showed potential as a field-effect transistor candidate for the specific detection of NO, with enhanced sensing performance achievable through the application of external in-plane strain. Overall, the study provides valuable insights into the sensing properties of fibrous red phosphorene at an atomic level.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Lorenzo Villa, Karsten Albe
Summary: The influence of doping on defect equilibrium and double P-E loops in NaNbO3 material was studied. Formation energies, charge transition levels, and doping behavior of single defects and defect complexes doped with Ca, Sn, and Sr in orthorhombic NaNbO3 were calculated using density functional theory (DFT). The results show that dopants substitutions have low formation energies and all defect complexes have negative binding energy.
Article
Chemistry, Physical
Yuan Ren, Shenbo Yang, Xiyu Ma, Chao Zhang, Bingzheng Song, Changjie Sun, Xin Tan, Shiyang Sun
Summary: A first principles method was used to calculate the stability of the double-layer SEI of nitrogen-doped graphene composites with lithium nitride. The NG-2/Li3N heterostructure was found to limit interface deformation caused by lithium adsorption under mechanical strength and increase the stability of lithium adsorption at the interface.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Bao Chen, Chuan-Hui Zhang, Ying Jin
Summary: This study investigates the structures and fracture properties of η'/Al bulk and surface models under stress and H environment using first-principles calculations. Stress-strain curves are obtained to understand the effect of stress and H on the structural properties, while the role of stress on η'/Al combined bulk and surface is analyzed through the difference charge density. Additionally, the adsorption and penetration of H into the phase boundary from the surface are discussed in detail, aiming to contribute to the understanding of stress corrosion in Al-Zn-Mg-Cu alloy.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Artem Soshnikov, Ambarish Kulkarni, Nir Goldman
Summary: This study investigates the possible mechanisms for the formation of metal hydride in uranium and highlights the importance of hydrogen monolayer coverage and applied tensile strain on hydriding kinetics. By studying previously overlooked phenomena, foundational insights into the initial steps of this complex process are provided.
Article
Chemistry, Physical
Xin Ye, Wen Ou, Bin Ai, Yecheng Zhou
Summary: In this study, surface modifications of a series of small molecules were investigated using first-principles calculations. It was found that molecules with nitrogen-containing groups could be suitable modifiers, while molecules such as oxygen-containing six-membered rings and 1,2,4-triazine may induce defect states. Design guidelines for perovskite surface modification molecules were proposed based on the calculations.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
San-Dong Guo, Meng-Xia Wang
Summary: This study constructs a Janus monolayer MnSbBiTe4 with dynamic, mechanical, and thermal stabilities by replacing the top Bi atomic layer of a synthesized non-piezoelectric MnBi2Te4 monolayer with Sb atoms. The monolayer exhibits intrinsic ferromagnetic semiconductor properties, with an out-of-plane easy magnetization axis and a large d(11) value that can be effectively tuned through strain engineering. The robustness of its ferromagnetic order, semiconducting properties, and large d(11) value against electronic correlations is demonstrated, providing a potential pathway to achieve piezoelectric ferromagnetism with a large d(11) in well-known vdW compound MnBi2Te4.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Xuanyu Jiang, Yang Li, Liening Wei, Mingxia Xu, Lisong Zhang, Jun Chen, Xun Sun
Summary: This study, conducted using density functional theory, reveals that the [010] screw dislocation in KDP crystals under shear stress deforms the crystal structure, narrows the band gap, and enhances the linear and nonlinear absorption of the crystal. Additionally, the presence of this dislocation may weaken KDP's resistance to laser irradiation.
Article
Chemistry, Physical
Jiang Zheng, Weiguo Sun, Xilong Dou, Ai-Jie Mao, Cheng Lu
Summary: A systematic investigation of ternary hydride MgVH6 within the pressure range of 0-200 GPa revealed the appearance of three new metallic phases with increasing pressure, showing potential superconducting properties at certain pressure points. The superconductivity in MgVH6 is mainly derived from the strong electron-phonon interaction of heavier transition metal V atoms.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Inorganic & Nuclear
Meng Ju, Hao Liang, Yongsheng Zhu, Yau-yuen Yeung, Hongkuan Yuan, Mingmin Zhong, Wei Dai, Cheng Lu
Summary: Trivalent praseodymium (Pr3+)-doped YAlO3 crystals were studied using the CALYPSO method, unveiling a novel monoclinic structure with semiconductor characteristics. By employing the WEPMD method, the energy level scheme and energy transfer mechanism of YAP:Pr were systematically analyzed, providing insights for optimizing laser channels and identifying laser emission lines in the visible light region.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Wenli Zhou, Siyu Jin, Wei Dai, Jonathan T. Lyon, Cheng Lu
Summary: This study explored the formation process and structural evolution of NbHn clusters, finding NbH13 to be the most stable cluster with high hydrogen storage density and suitable adsorption energy. These results suggest promising applications as a hydrogen storage material and provide fundamental information for further design of metal hydrogen storage materials.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Siyu Jin, Weiguo Sun, Bole Chen, Xiaoyu Kuang, Haiyan Lu, Cheng Lu
Summary: This study conducted an extensive ground-state structure search for CeBn and CeBn- clusters, revealing that both neutral and anionic series possess half-sandwich geometry, with the neutral series showing a tendency to form borophene-like geometry and the anionic series containing more pentagonal and hexagonal holes.
JOURNAL OF PHYSICAL CHEMISTRY A
(2021)
Article
Chemistry, Physical
Cheng Lu, Changfeng Chen
Summary: The study revealed that ZrB2 possesses an intrinsic indentation strength, with variations in hardness values mainly driven by extrinsic factors. The quality of specimen crystallinity is crucial in achieving improved hardness corresponding to the predicted intrinsic strength.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Cheng Lu, Chuyan Cui, Feng Peng
Summary: This study investigates the stress-strain relations and deformation mechanisms of ZrN and HfN under different strains using first-principles calculations. The results provide a comprehensive description of their versatile stress responses and confirm the calculated indentation shear strengths. Additionally, it is found that HfN exhibits superior mechanical properties compared to ZrN, which is attributed to its higher valence electron concentration.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Physical
Lili Zhang, Siyu Jin, Mengxue Ren, Cheng Lu, Feng Peng, Gennady L. Gutsev
Summary: The magnesium-lanthanum-hydrogen systems show good stability and high hydrogen storage capacity, providing new insights for the design and synthesis of novel hydrogen storage materials.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Nanoscience & Nanotechnology
Wei Dai, Shi He, Kewei Ding, Cheng Lu
Summary: Synthesizing and stabilizing nitrogen-rich compounds at moderate pressure and near ambient conditions is a significant challenge. In this study, several hydronitrogens were found to be stable at pressures of 80-300 GPa and exhibited higher energy densities compared to trinitrotoluene. Interestingly, the N4H compound exhibited excellent high-temperature superconductivity in the Pbam phase.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Wenyuan Jin, Jiafei Pang, Ling Yue, Menghua Xie, Xiaoyu Kuang, Cheng Lu
Summary: Designing the two-dimensional metal dichalcogenide PbS2 with negative Poisson ratio behavior is important for flexible electronics. The PbS2 monolayer has a unique tetrahedral motif and the ligand field of the local PbS4 units, resulting in a Poisson ratio of -0.061. The PbS2 monolayer can effectively modulate its narrow band gap through strain engineering, making it a promising catalyst for photocatalytic water splitting.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Physics, Condensed Matter
Zhiyang Xiang, Zhongjie Luo, Jie Bi, Siyu Jin, Ziqiang Zhang, Cheng Lu
Summary: In this study, systematic structure predictions of medium-sized vanadium-doped boron clusters were carried out using crystal structure analysis and particle swarm optimization method combined with density functional theory calculations. Various low-energy isomers with attractive geometries were discovered, and the relative stability and main factors for stabilization of the VB12 (-) cluster were revealed.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Materials Science, Ceramics
Yajie Yu, Shi He, Zhengang Zhang, Haihua Chen, Peipeng Jin, Binnian Zhong, Linhui Zhang, Liping Wang, Cheng Lu
Summary: Silicide ceramics, including tantalum disilicide (TaSi2), are known for their exceptional physical properties but are limited in practical applications due to their inherent brittleness at room temperature. In this study, we successfully improved the mechanical properties of TaSi2 ceramics and increased their electrical conductivity by modifying the preparation methods and sintering conditions. These findings provide valuable insights for future applications of TaSi2 and the design of advanced ceramic materials.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Chemistry, Multidisciplinary
Jiafei Pang, Wenyuan Jin, Xiaoyu Kuang, Cheng Lu
Summary: When two-dimensional materials are stacked into van der Waals structures, interlayer electronic coupling can induce excellent properties in energy storage materials. In this study, the interlayer coupling of the FeN/Fe(2)B(2) heterojunction as an anode material was investigated, and it was found to exhibit good performances with high capacities for Al and Li. The stable FeN/Fe(2)B(2) heterojunction showed low diffusion barriers, high Al ion capacity, and relatively low voltages, making it a promising electrode material.
Article
Materials Science, Multidisciplinary
Simin Li, Haiyan Wang, Weiguo Sun, Cheng Lu, Feng Peng
Summary: Recently, researchers synthesized carbonaceous sulfur hydride and found that it exhibits a high superconducting transition temperature under ultra-high pressure, making it a promising candidate for room temperature superconductivity. In order to search for more high-temperature superconductors under relatively low pressure, the researchers conducted structural searches and discovered that ternary alkaline boron hydrides exhibit thermodynamic stability at around 10 GPa. Additionally, metallic polyhydrides also exhibit excellent superconducting properties, offering crucial insights for the design and synthesis of novel superconductors.
Article
Materials Science, Multidisciplinary
Qingzhuo Duan, Junyu Shen, Xin Zhong, Haiyan Lu, Cheng Lu
Summary: The study on the structural phase transition and superconductivity of late lanthanide ytterbium (Yb) metal under high pressure revealed the serendipitous discovery of the P6(3)/mmc phase as a superior superconductor with a critical temperature higher than other known RE elemental superconductors.
Article
Materials Science, Multidisciplinary
Xilong Dou, Xiaoyu Kuang, Weiguo Sun, Gang Jiang, Cheng Lu, Andreas Hermann
Summary: By conducting structural searches and calculations, we identified a ternary magnesium-based hydrogen storage compound Mg7NbH19 with high hydrogen storage capacity and low dehydrogenation temperature. This compound achieves the remarkable decrease of hydrogen release temperature through atomic rearrangements that form H-H pairs and weaken metal-hydrogen chemical bonds.