@@ -2424,3 +2424,89 @@ @Article{Zhang_PhysRevLett_2018_v120_p143001
24242424 doi = { 10.1103/PhysRevLett.120.143001} ,
24252425}
24262426
2427+ @article {He_PhysRevB_2022_v105_p064104 ,
2428+ title = { Structural phase transitions in $\mathrm{SrTi}{\mathrm{O}}_{3}$ from deep potential molecular dynamics} ,
2429+ author = { He, Ri and Wu, Hongyu and Zhang, Linfeng and Wang, Xiaoxu and Fu, Fangjia and Liu, Shi and Zhong, Zhicheng} ,
2430+ journal = { Phys. Rev. B} ,
2431+ volume = { 105} ,
2432+ issue = { 6} ,
2433+ pages = { 064104} ,
2434+ numpages = { 10} ,
2435+ year = { 2022} ,
2436+ month = { Feb} ,
2437+ publisher = { American Physical Society} ,
2438+ doi = { 10.1103/PhysRevB.105.064104} ,
2439+ }
2440+
2441+ @Article {Yang_Chemphyschem_2022_v23_pe202100841 ,
2442+ author = { Weijie Yang and Jiajia Li and Xuelu Chen and Yajun Feng and Chongchong
2443+ Wu and Ian D Gates and Zhengyang Gao and Xunlei Ding and Jianxi Yao
2444+ and Hao Li} ,
2445+ title = { {Exploring the Effects of Ionic Defects on the Stability of CsPbI
2446+ <sub>3</sub> with a Deep Learning Potential}} ,
2447+ journal = { Chemphyschem} ,
2448+ year = 2022 ,
2449+ volume = 23 ,
2450+ issue = 7 ,
2451+ pages = { e202100841} ,
2452+ annote = { Inorganic metal halide perovskites, such as CsPbI3 , have recently
2453+ drawn extensive attention due to their excellent optical properties
2454+ and high photoelectric efficiencies. However, the structural
2455+ instability originating from inherent ionic defects leads to a sharp
2456+ drop in the photoelectric efficiency, which significantly limits their
2457+ applications in solar cells. The instability induced by ionic defects
2458+ remains unresolved due to its complicated reaction process. Herein, to
2459+ explore the effects of ionic defects on stability, we develop a deep
2460+ learning potential for a CsPbI3 ternary system based upon density
2461+ functional theory (DFT) calculated data for large-scale molecular
2462+ dynamics (MD) simulations. By exploring 2.4 million configurations, of
2463+ which 7,730 structures are used for the training set, the deep
2464+ learning potential shows an accuracy approaching DFT-level.
2465+ Furthermore, MD simulations with a 5,000-atom system and a one
2466+ nanosecond timeframe are performed to explore the effects of bulk and
2467+ surface defects on the stability of CsPbI3 . This deep learning
2468+ potential based MD simulation provides solid evidence together with
2469+ the derived radial distribution functions, simulated diffraction of
2470+ X-rays, instability temperature, molecular trajectory, and
2471+ coordination number for revealing the instability mechanism of CsPbI3
2472+ . Among bulk defects, Cs defects have the most significant influence
2473+ on the stability of CsPbI3 with a defect tolerance concentration of
2474+ 0.32{\,}%, followed by Pb and I defects. With regards to surface
2475+ defects, Cs defects have the largest impact on the stability of CsPbI3
2476+ when the defect concentration is less than 15{\,}%, whereas Pb defects
2477+ act play a dominant role for defect concentrations exceeding 20{\,}%.
2478+ Most importantly, this machine-learning-based MD simulation strategy
2479+ provides a new avenue to explore the ionic defect effects on the
2480+ stability of perovskite-like materials, laying a theoretical
2481+ foundation for the design of stable perovskite materials.} ,
2482+ doi = { 10.1002/cphc.202100841} ,
2483+ }
2484+
2485+ @Article {Zhang_NatCommun_2022_v13_p822 ,
2486+ author = { Chunyi Zhang and Shuwen Yue and Athanassios Z Panagiotopoulos and
2487+ Michael L Klein and Xifan Wu} ,
2488+ title = { {Dissolving salt is not equivalent to applying a pressure on water}} ,
2489+ journal = { Nat. Commun.} ,
2490+ year = 2022 ,
2491+ volume = 13 ,
2492+ issue = 1 ,
2493+ pages = 822 ,
2494+ annote = { Salt water is ubiquitous, playing crucial roles in geological and
2495+ physiological processes. Despite centuries of investigations, whether
2496+ or not water's structure is drastically changed by dissolved ions is
2497+ still debated. Based on density functional theory, we employ machine
2498+ learning based molecular dynamics to model sodium chloride, potassium
2499+ chloride, and sodium bromide solutions at different concentrations.
2500+ The resulting reciprocal-space structure factors agree quantitatively
2501+ with neutron diffraction data. Here we provide clear evidence that the
2502+ ions in salt water do not distort the structure of water in the same
2503+ way as neat water responds to elevated pressure. Rather, the computed
2504+ structural changes are restricted to the ionic first solvation shells
2505+ intruding into the hydrogen bond network, beyond which the oxygen
2506+ radial-distribution function does not undergo major change relative to
2507+ neat water. Our findings suggest that the widely cited pressure-like
2508+ effect on the solvent in Hofmeister series ionic solutions should be
2509+ carefully revisited.} ,
2510+ PMCID = { PMC8831556} ,
2511+ doi = { 10.1038/s41467-022-28538-8} ,
2512+ }
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