The Experts below are selected from a list of 252723 Experts worldwide ranked by ideXlab platform
Chen Fang - One of the best experts on this subject based on the ideXlab platform.
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catalogue of topological Electronic Materials
Nature, 2019Co-Authors: Tiantian Zhang, Yi Jiang, Zhida Song, He Huang, Zhong Fang, Hongming Weng, Chen FangAbstract:Topological Electronic Materials such as bismuth selenide, tantalum arsenide and sodium bismuthide show unconventional linear response in the bulk, as well as anomalous gapless states at their boundaries. They are of both fundamental and applied interest, with the potential for use in high-performance Electronics and quantum computing. But their detection has so far been hindered by the difficulty of calculating topological invariant properties (or topological nodes), which requires both experience with Materials and expertise with advanced theoretical tools. Here we introduce an effective, efficient and fully automated algorithm that diagnoses the nontrivial band topology in a large fraction of nonmagnetic Materials. Our algorithm is based on recently developed exhaustive mappings between the symmetry representations of occupied bands and topological invariants. We sweep through a total of 39,519 Materials available in a crystal database, and find that as many as 8,056 of them are topologically nontrivial. All results are available and searchable in a database with an interactive user interface.
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catalogue of topological Electronic Materials
arXiv: Materials Science, 2018Co-Authors: Tiantian Zhang, Yi Jiang, Zhida Song, He Huang, Zhong Fang, Hongming Weng, Chen FangAbstract:Topological Electronic Materials are new quantum states of matter hosting novel linear responses in the bulk and anomalous gapless states at the boundary, and are for scientific and applied reasons under intensive research in physics and in Materials sciences. The detection for such Materials has so far been hindered by the level of complication involved in the calculation of the so-called topological invariants, and is hence considered a specialized task that requires both experience with Materials and expertise with advanced theoretical tools. Here we introduce an effective, efficient and fully automated algorithm in obtaining the topological invariants for all non-magnetic Materials that are known to human, based on recently developed principles that allow for exhaustive mappings between the symmetry representation of occupied bands and the topological invariants. Our algorithm requires as input only the occupied-band information (energy and wavefunction) at a handful (up to eight) of high-symmetry points in the Brillouin zone, which is readily calculable with any first-principles software. In return, it is capable of providing a detailed topological classification of all non-magnetic Materials. Equipped with this method we have scanned through a total of 39519 Materials available in structural databases, and found that as many as 8056 of them are actually topological (8889 if spin-orbital coupling is neglected). These are further catalogued into classes of 5005 topological semimetals,1814 topological insulators and 1237 topological crystalline insulators, most of which are new to human knowledge. All the results are available and searchable at this http URL .
Tiantian Zhang - One of the best experts on this subject based on the ideXlab platform.
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catalogue of topological Electronic Materials
Nature, 2019Co-Authors: Tiantian Zhang, Yi Jiang, Zhida Song, He Huang, Zhong Fang, Hongming Weng, Chen FangAbstract:Topological Electronic Materials such as bismuth selenide, tantalum arsenide and sodium bismuthide show unconventional linear response in the bulk, as well as anomalous gapless states at their boundaries. They are of both fundamental and applied interest, with the potential for use in high-performance Electronics and quantum computing. But their detection has so far been hindered by the difficulty of calculating topological invariant properties (or topological nodes), which requires both experience with Materials and expertise with advanced theoretical tools. Here we introduce an effective, efficient and fully automated algorithm that diagnoses the nontrivial band topology in a large fraction of nonmagnetic Materials. Our algorithm is based on recently developed exhaustive mappings between the symmetry representations of occupied bands and topological invariants. We sweep through a total of 39,519 Materials available in a crystal database, and find that as many as 8,056 of them are topologically nontrivial. All results are available and searchable in a database with an interactive user interface.
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catalogue of topological Electronic Materials
arXiv: Materials Science, 2018Co-Authors: Tiantian Zhang, Yi Jiang, Zhida Song, He Huang, Zhong Fang, Hongming Weng, Chen FangAbstract:Topological Electronic Materials are new quantum states of matter hosting novel linear responses in the bulk and anomalous gapless states at the boundary, and are for scientific and applied reasons under intensive research in physics and in Materials sciences. The detection for such Materials has so far been hindered by the level of complication involved in the calculation of the so-called topological invariants, and is hence considered a specialized task that requires both experience with Materials and expertise with advanced theoretical tools. Here we introduce an effective, efficient and fully automated algorithm in obtaining the topological invariants for all non-magnetic Materials that are known to human, based on recently developed principles that allow for exhaustive mappings between the symmetry representation of occupied bands and the topological invariants. Our algorithm requires as input only the occupied-band information (energy and wavefunction) at a handful (up to eight) of high-symmetry points in the Brillouin zone, which is readily calculable with any first-principles software. In return, it is capable of providing a detailed topological classification of all non-magnetic Materials. Equipped with this method we have scanned through a total of 39519 Materials available in structural databases, and found that as many as 8056 of them are actually topological (8889 if spin-orbital coupling is neglected). These are further catalogued into classes of 5005 topological semimetals,1814 topological insulators and 1237 topological crystalline insulators, most of which are new to human knowledge. All the results are available and searchable at this http URL .
George G Malliaras - One of the best experts on this subject based on the ideXlab platform.
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hydrofluoroethers as orthogonal solvents for the chemical processing of organic Electronic Materials
Advanced Materials, 2008Co-Authors: Alex Zakhidov, Hon Hang Fong, John A Defranco, Margarita Chatzichristidi, Priscilla G Taylor, Christopher K Ober, George G MalliarasAbstract:A study was conducted to demonstrate a new approach for chemicalprocessing of organic Electronic Materials. It was demonstrated that the approach is based on the use of fluorous solvents, segregated hydrofluoroethers (HFE). The study also demonstrated that that processing organic Electronics, using HFEs under extreme conditions, such as boiling temperatures, does not cause any dissolution, cracking, delamination,or other unfavorable physical or chemical change. The study also demonstrated that the use of fluorous solvents enables simple photolithographic patterning of organic Electronic Materials. It was shown that fluorous solvents are perfluorinated on very highly fluorinated liquids, which are immiscible with organic solvents and water.
Bin Liu - One of the best experts on this subject based on the ideXlab platform.
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Nanoparticles of Organic Electronic Materials for Biomedical Applications
ACS nano, 2020Co-Authors: Eshu Middha, Bin LiuAbstract:Organic Electronic Materials play important roles in modern Electronic devices such as light-emitting diodes, solar cells, and transistors. Upon interaction with light, these optically active mater...
Akio Hiraki - One of the best experts on this subject based on the ideXlab platform.
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Preparation of fine powders for Electronic Materials by freeze-drying
Applied Surface Science, 1993Co-Authors: T. Tachiwaki, M. Suzuki, H. Okajima, S. Koizumi, Tsuyohito Ito, Akio HirakiAbstract:Abstract Fine powders for Electronic Materials have successfully been prepared using a freeze-drying method. Freeze-drying is a suitable method of synthesizing superconducting powders and ferrites of high homogeneity and reactivity, because the freeze-dried powders are fine and porous. The fine powders for the Y-Ba-Cu-O superconductor, barium ferrite, lithium ferrite and γ-ferrite were prepared using freeze-drying of the suspensions obtained from liquid-phase reactions. These powders were confirmed to be useful for Electronic Materials by characterizations, such as elementary analyses, pore distribution, EPMA images, SEM pictures, differential thermal analyses. Furthermore, the Y-Ba-Cu-O superconductor and ferrites were manufactured from these powders, and showed good electric and magnetic properties. Judging from these results, the freeze-drying method is expected to be useful in the manufacture of powders for Electronic Materials.