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280 results on '"Lu, Haiming"'

19. Room-Temperature Growth of Square-Millimeter Single-Crystalline Two-Dimensional Metal Halides on Silicon

Author

Wan, Zuteng, primary, Chen, Zhiwen, additional, Shi, Lei, additional, Zheng, Anqi, additional, Min, Jin, additional, Shen, Cong, additional, Du, Bingfeng, additional, Guo, Yanhua, additional, Gao, Xu, additional, Yin, Jiang, additional, Ge, Haixiong, additional, Niu, Shanyuan, additional, Lu, Haiming, additional, Yin, Kuibo, additional, Wu, Di, additional, Liu, Zhiguo, additional, and Xia, Yidong, additional

Published
2024
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24. Super Multi-view 3D Display with 170 Viewpoints Based on Rotating OLED Display Columns

Author

Tan, Qirui, Lu, Haiming, Lu, Zengxiang, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Zhao, Yao, editor, Barnes, Nick, editor, Chen, Baoquan, editor, Westermann, Rüdiger, editor, Kong, Xiangwei, editor, and Lin, Chunyu, editor

Published
2019
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32. Atomistic simulation of defects and thermal conductivity in oxides

Author

Lu, Haiming and Grimes, Robin

Subjects
548.85
Abstract

Atomic scale computer simulation techniques are used to predict the thermal conductivity and defect properties in Li2O and Bi4Ti3O12 ceramics. Li2O represents a simple model system while Bi4Ti3O12 is a complex layered oxide ceramic with potential engineering applications due to its highly anisotropic thermal conductivity. The efficacy of the available pair potential models for Li2O are evaluated by comparing with experimental properties such as lattice parameters, elastic constants, thermal expansion and bulk modulus. Other properties, such as the Li ion superionic transition temperature, activation energy and diffusion coefficients for lithium diffusion are also compared with experimental data. The empirical potential set of Chroneos et al. [1] was found to best replicate the experimental diffusion data; therefore this potential was used to calculate the reaction energies of the intrinsic disorder properties and then used in the investigation of the thermal properties of Li2O. The thermal conductivity of Li2O was calculated using the velocity exchange methodology within molecular dynamic simulations. The calculated thermal conductivity was compared to experimental data. A number of corrections have been suggested to improve the agreement between the simulated thermal conductivity and the equivalent experimental value. These corrections and the underlying physics are also discussed within the context of Li2O. The extent of the isotope effect on thermal conductivity was investigated by comparing a supercell, in which there is a random distribution of 6Li and 7Li atoms, to a supercell where all the atoms are given a fractional average mass. The results show that the effect of a non-homogeneous distribution of Li mass can lead to a significant decrease in the thermal conductivity at low temperatures but this effect gradually decreased up to the superionic transition temperatures, where it disappears altogether. Two different structures have been proposed for low temperature Bi4Ti3O12, one with a monoclinic space group (B1a1 ) and the other with a very similar structure but an more symmetric orthorhombic space group (B2cb). A combination of empirical pair potential and first principles density functional simulations are employed to compare the two structures. Both techniques suggest the monoclinic structure has the lower energy of the two candidate structures. The enthalpy of formation of Bi4Ti3O12 is calculated using first principles simulation. The macroscopic properties of a material are determined by the concentration and behaviour of point defects such as vacancies and interstitials. Therefore, density functional theory (DFT) simulations were performed to investigate the formation energies and defect volume of vacancy defect in Bi4Ti3O12. The pair potential set of Islam et al. [2] and Snedden et al. [3] which replicate the structural properties of Bi4Ti3O12 were used to predict the anisotropic thermal conductivities of Bi4Ti3O12 in x, y and z direction. The sound velocity and mean free paths were calculated and used to explain the temperature independent thermal conductivity in the z direction and the anisotropic thermal conductivity. Finally, the Debye temperature as a function of temperature was computed.

Published
2012
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35. Water Quality in Irrigated Paddy Systems

Author

Liu, Jian, primary, Liu, Hongbin, additional, Liu, Ruliang, additional, Mostofa Amin, MG, additional, Zhai, Limei, additional, Lu, Haiming, additional, Wang, Hongyuan, additional, Zhang, Xubo, additional, Zhang, Yitao, additional, and Zhao and Xiaodong Ding, Ying, additional

Published
2019
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40. Individual contribution of electrons and holes to photocarrier-induced bandgap renormalization in intrinsic bulk GaAs.

Author

Chen, Yicun, Lu, Haiming, and Lai, Tianshu

Subjects
*AUDITING standards, *SOLID-state plasmas, *ELECTRONS, *QUANTUM wells, *SPINTRONICS, *DYNAMIC models, *INDIUM gallium arsenide
Abstract

With the advent of semiconductor spintronics, spin-polarized electron–hole plasmas could occur in semiconductors, leading to spin-dependent many-body effects. To understand these many-body effects, spin-dependent bandgap renormalization (BGR) often needs to be calculated quantitatively, which requires to know the fractional contribution of electrons (k) to the total BGR induced by the electron–hole plasma. However, the measurement of the k value is challenging because BGR is usually submerged or partially offset by the strong band-filling effect. Facing this challenge, we develop a new experimental technique which could measure spin-dependent many-body effects without the influence from the band-filling effect. The presented technique is employed in intrinsic bulk GaAs, with a dynamic model developed to extract the k value from the measured data. It is found that the k value in bulk GaAs increases with increasing concentration of the photoinjected electron–hole plasma but is consistently much less than the reported value in GaAs quantum wells. These results reveal obviously different many-body interactions in bulk GaAs and its quantum wells. [ABSTRACT FROM AUTHOR]

Published
2020
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41. Robust half-metallicity in nonmetal atoms intercalated two-dimensional GaN bilayer.

Author

Pan, Bai, Lin, Like, Huang, Yineng, Wu, Linglu, Bao, Sitong, Lu, Haiming, and Xia, Yidong

Subjects
PHASE transitions, GALLIUM nitride, NONMETALS, DENSITY functional theory, ATOMS, BILAYER lipid membranes
Abstract

Transition metal-free half-metallicity recently has been the subject of intense research activity due to its potential in spintronics application. By employing density functional theory calculations, we revealed that F-intercalated GaN bilayers exhibit robust p orbital-based half-metallicity against the intercalant concentration and biaxial strain of −10% to 10%. The stable half-metallicity results from a spontaneous phase transition through Stoner instability and can be attributed to unusually high density of states near the Fermi level due to the quasi-flat bands. These findings provide a strategy to design transition-metal free half-metallic materials for futuristic spintronic applications. [ABSTRACT FROM AUTHOR]

Published
2023
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45. Additional file 1 of Toddalolactone protects against osteoarthritis by ameliorating chondrocyte inflammation and suppressing osteoclastogenesis

Author

Xu, Yiming, Xue, Song, Zhang, Tian, Jin, Xinmeng, Wang, Cong, Lu, Haiming, Zhong, Yiming, Chen, Hongjie, Zhu, Libo, Ma, Jinzhong, and Sang, Weilin

Abstract

Additional file 1: Fig. S1. The quantification of apoptotic cells and the density of the western blot bands in Fig. 1. Fig. S2. TOD inhibited the expression of inflammatory and catabolic mediators in IL-1�� induced chondrocytes. Fig. S3. TOD suppressed Ctr expression during osteoclastogenesis in vitro.

Published
2022
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