Article
Materials Science, Multidisciplinary
Demeng Feng, Raymond A. Wambold, Yuzhe Xiao, Chenghao Wan, Zhaoning Yu, Victor W. Brar, Mikhail A. Kats
Summary: The researchers proposed a method to enhance the optical pressure on a metal film suspended in free space by structuring it with a periodic array of nanoscale slots. However, their result contradicts the law of momentum conservation. Recalculations of the optical forces show that there was no enhancement, but instead matched the standard radiation-pressure relation.
Article
Chemistry, Multidisciplinary
M. Yagmurcukardes, Y. Sozen, M. Baskurt, F. M. Peeters, H. Sahin
Summary: The electronic, optical, and piezoelectric properties of van der Waals heterobilayers formed by b-GeO and Janus MoSO structures were investigated using first-principles calculations. Different interface formations resulted in different band alignments, optical absorption spectra, and Raman spectra. The alignment of individual dipoles at interfaces led to tunable piezoelectric coefficients, indicating potential applications in electronic devices.
Article
Chemistry, Multidisciplinary
Dmitry Averyanov, Ivan S. Sokolov, Alexander N. Taldenkov, Oleg E. Parfenov, Andrey M. Tokmachev, Vyacheslav G. Storchak
Summary: 2D magnetic materials are at the forefront of magnetism research, exhibiting unconventional phases and properties controlled by external stimuli. This study reports 2D magnetic phases of Eu on the Ge(110) surface, with different surface densities of Eu atoms. The phases exhibit in-plane magnetic ordering at low temperatures, with a strong dependence of the effective magnetic transition temperature on weak magnetic fields. The study suggests that a variety of substrates can host submonolayer 2D magnetic phases.
Letter
Environmental Sciences
Montserrat Filella
Summary: This letter evaluates and corrects errors in the article "A review of public and environmental consequences of organic germanium" by Zheng et al. published in this journal in 2020, aiming to clarify the definition of organic germanium and prevent the propagation of errors in scientific literature.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Physics, Condensed Matter
Yingying Wang, Kui Wang, Yanmei Ma, Mi Zhou, Hongbo Wang, Guangtao Liu
Summary: This study systematically investigated the pressure dependence of electrical transport and the structural evolution of GeTe, revealing different structural phase transitions and superconductivity transitions at different pressures. The results provide experimental support for understanding the fundamental properties of phase-change materials.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Materials Science, Multidisciplinary
J. Dong, J. Shen, Y. H. Sun, H. B. Ke, B. A. Sun, W. H. Wang, H. Y. Bai
Summary: The study found that the torsion fracture of metallic glasses may deviate from the circumferential shear plane, and the fracture angle is closely related to the composition and size, showing an intrinsic relationship between fracture mechanism and fracture toughness in MGs.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Je In Lee, Wook Ha Ryu, Kook Noh Yoon, Eun Soo Park
Summary: By systematically designing Mg-based bulk metallic glass matrix composites containing primary alpha-Mg phases, the developed materials exhibit significantly higher compressive fracture strength and specific strength compared to commercial Mg alloys. The presence of dispersed primary alpha-Mg phases in the composite materials inhibits rapid shear band propagation and promotes the formation of multiple shear bands, leading to enhanced plasticity and work hardening. These results suggest a promising strategy for fabricating Mg-based BMGMCs with high specific strength and enhanced plasticity for lightweight structural applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Sharon S. Philip, Junjie Yang, Despina Louca, P. F. S. Rosa, J. D. Thompson, K. L. Page
Summary: The properties of 4.15 K superconductor RbBi2 were investigated using magnetic field, pressure, and neutron diffraction. It was found that the resistivity and magnetic susceptibility of slow-cooled and quenched samples exhibit differences, with structural symmetry in slow-cooled samples and periodic distortions in quenched samples.
Article
Physics, Multidisciplinary
Zhengguo Wang, Weiliang Yao, Yudi Wang, Ziming Xin, Tingting Han, Lei Chen, Yi Ou, Cong Cai, Yuan Li, Yan Zhang
Summary: In this study, two distinct metal-insulator transitions were discovered in 1T-TaS2 using angle-resolved photoemission spectroscopy and in-situ rubidium deposition. The results successfully differentiate the metallic, band-insulating, and Mott-insulating phases of 1T-TaS2, revealing a delicate balance among electron-itineracy, interlayer-coupling, and Coulomb repulsion.
Article
Physics, Condensed Matter
Hulei Yu, Yue Chen
Summary: By investigating the behavior of materials in the yttrium-chlorine binary system under pressure, a novel yttrium chloride Y3Cl2 stable at around 10 GPa and new compounds and a YCl phase formed above 20 GPa were discovered. These materials exhibit properties of electrides and metals.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Chemistry, Physical
BingYu Li, WenHua Yang, HaiLiang Chen, LiZhen Zhao, LingYan Chen, KaiPing Yang, WenCai Lu
Summary: The structures, stabilities, and superconducting properties of LiSeHn (n=4-10) hydrides under high pressure were investigated using the genetic algorithm (GA) and DFT calculation method. Three stable stoichiometries and four metastable stoichiometries were identified. Metal phase behavior was observed for C2 LiSeH4, Pmm2 LiSeH6, and C2 LiSeH10 above 150 GPa. Superconducting properties were predicted for C2 LiSeH4 and Pmm2 LiSeH6 with Tc values of 77 K at 200 GPa and 111 K at 250 GPa, respectively.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Lukas Wind, Masiar Sistani, Raphael Boeckle, Juergen Smoliner, Lada Vukusic, Johannes Aberl, Moritz Brehm, Peter Schweizer, Xavier Maeder, Johann Michler, Frank Fournel, Jean-Michel Hartmann, Walter M. Weber
Summary: This study reports on the systematic structural and electronic properties of Al-Si1-xGex heterostructures obtained through thermally induced exchange. The resulting junctions exhibit high structural quality with no intermetallic phases, and ultra-thin interfacial Si layers contribute to the morphologic stability. The findings provide a versatile platform with Si1-xGex composition-dependent properties, which can open up new device implementations for emerging nanoelectronic, optoelectronic, and quantum devices.
Article
Physics, Applied
N. N. Wang, P. F. Shan, K. Y. Chen, J. P. Sun, P. T. Yang, X. L. Ma, B. S. Wang, X. H. Yu, S. Zhang, G. F. Chen, J-G Cheng, X. L. Dong, X. H. Chen, Z. X. Zhao
Summary: Among metal hydrides, Th4H15 is the first reported superconductor with a relatively high T-c of 8 K at ambient pressure. A low-T-c superconducting modification of Th4H15 was synthesized via hydrogenating Th metal at 5 GPa and 800 degrees C, showing a bulk superconducting transition at T-c 6 K. Various characteristic superconducting parameters were extracted for this compound and unusual lattice dynamics were observed from the specific heat analysis.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
V Guder, S. Sengul, M. Celtek, U. Domekeli
Summary: Pressure was found to have an effect on the local microstructure in amorphous Pd80Si20 alloy, with an increase in pressure leading to a higher glass transition temperature. The complexity of the local structure was attributed to the Pd atoms in face centered cubic (fcc) and icosahedral-like order, while the short-range order around Si atoms was characterized by a tri-capped trigonal prism. The topological structure and local environment of the system consisting of icosahedral-, hexagonal-, and fcc-like structural units underwent significant changes under pressure, with the short-range order developing due to the increase of icosahedral and defected icosahedral polyhedra, and Pd atoms playing a role in the formation of the amorphous state.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
J. Hou, K. Y. Chen, J. P. Sun, Z. Zhao, Y. H. Zhang, P. F. Shan, N. N. Wang, H. Zhang, K. Zhu, Y. Uwatoko, H. Chen, H. T. Yang, X. L. Dong, H. -J. Gao, J. -G. Cheng
Summary: Recent studies on CsV3Sb5 show that there is a complex interaction between unconventional charge density waves and superconductivity. Substituting Ti for V in CsV3-xTixSb5 can disturb the charge density waves and produce different superconducting phases. High pressure studies on Ti-doped CsV3-xTixSb5 samples reveal the competition and coexistence of charge density waves and superconductivity. These results provide more insight into the competing electronic orders in Ti-doped kagome superconductors.
Review
Physics, Condensed Matter
Boeri Lilia, Richard Hennig, Peter Hirschfeld, Gianni Profeta, Antonio Sanna, Eva Zurek, Warren E. Pickett, Maximilian Amsler, Ranga Dias, Mikhail Eremets, Christoph Heil, Russell J. Hemley, Hanyu Liu, Yanming Ma, Carlo Pierleoni, Aleksey N. Kolmogorov, Nikita Rybin, Dmitry Novoselov, Vladimir Anisimov, Artem R. Oganov, Chris J. Pickard, Tiange Bi, Ryotaro Arita, Ion Errea, Camilla Pellegrini, Ryan Requist, E. K. U. Gross, Elena Roxana Margine, Stephen R. Xie, Yundi Quan, Ajinkya Hire, Laura Fanfarillo, G. R. Stewart, J. J. Hamlin, Valentin Stanev, Renato S. Gonnelli, Erik Piatti, Davide Romanin, Dario Daghero, Roser Valenti
Summary: Designing materials with advanced functionalities, particularly ambient temperature superconductors, is a major focus of contemporary solid-state physics and chemistry. This article collects contributions from experts in the field to provide an overview of the current research status and roadmap for future theoretical and experimental challenges. Achieving ambient temperature superconductivity would not only open up exciting possibilities for fundamental research, but also have significant technological implications in areas such as energy conservation and climate change.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Review
Physics, Multidisciplinary
Pengyue Gao, Bo Gao, Shaohua Lu, Hanyu Liu, Jian Lv, Yanchao Wang, Yanming Ma
Summary: This paper introduces the classification of 2D systems and their potential in various applications, and focuses on the recent research progress in accelerating the design of 2D systems using the CALYPSO methodology.
FRONTIERS OF PHYSICS
(2022)
Article
Multidisciplinary Sciences
Jurong Zhang, Hanyu Liu, Yanming Ma, Changfeng Chen
Summary: A new quaternary compound FeO2H2He has been identified, stabilized at high-pressure and high-temperature conditions, providing new theoretical evidence for the existence of exotic H-He mixtures inside Earth and other astronomical bodies.
NATIONAL SCIENCE REVIEW
(2022)
Article
Chemistry, Physical
Xuecheng Shao, Jian Lv, Peng Liu, Sen Shao, Pengyue Gao, Hanyu Liu, Yanchao Wang, Yanming Ma
Summary: This study proposes a symmetry-orientated divide-and-conquer scheme to simplify the problem of crystal structure prediction, and successfully predicts candidate structures of complex systems.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Review
Chemistry, Multidisciplinary
Meiling Xu, Yinwei Li, Yanming Ma
Summary: Pressure can induce the formation of new high-pressure phases and compounds with unconventional stoichiometries, leading to exotic physical and chemical properties. Recent studies have demonstrated the potential for developing new materials with specific desired properties under high pressure. Theory-oriented approaches have been successful in discovering compounds such as high-temperature superhydride superconductors, offering insights into the future direction of material design under high pressure.
Article
Public, Environmental & Occupational Health
Yan Ma, Qi Li
Summary: From the perspective of comprehensive modernization, the Sinicization and modernization of Marxism are inseparable from its popularization, which can make it more practical and vital. The development of the internet provides both opportunities and challenges for the popularization of Marxist philosophy, and in the context of contemporary China, promoting network knowledge, developing network culture, and improving relevant laws are important ways to achieve this popularization.
JOURNAL OF ENVIRONMENTAL AND PUBLIC HEALTH
(2022)
Article
Multidisciplinary Sciences
Jingkai Bi, Yuki Nakamoto, Peiyu Zhang, Katsuya Shimizu, Bo Zou, Hanyu Liu, Mi Zhou, Guangtao Liu, Hongbo Wang, Yanming Ma
Summary: The substitutional alloy (La,Ce)H-9 demonstrates a significant increase in the critical temperature Tc of superconducting superhydrides, reaching up to 148 K at pressures below 1 megabar. This finding highlights the potential of alloying as an effective tool to enhance Tc in superhydrides.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Hang Zhai, Rui Xu, Jianhong Dai, Xiaoli Ma, Xiaohui Yu, Quan Li, Yanming Ma
Summary: This study demonstrates the design and synthesis of novel nitrogen-rich compounds through the reaction between p electron elements and nitrogen at modest pressures. The research identifies multiple thermodynamically stable stoichiometries in the Ga-N system, which exhibit surprisingly versatile polymeric nitrogen framework topologies.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Physics, Applied
Baoyin Xu, Haozhe Du, Bin Yang, Zhanhui Ding, Xiancheng Wang, Yanchao Wang, Ziheng Li, Yongfeng Li, Bin Yao, Hong-An Ma, Yucheng Lan
Summary: The exploration of novel ultrawide bandgap (UWBG) semiconductors is an important research focus, with B-C-N compounds attracting attention due to their unique electronic structure and semiconductor properties. However, the lack of high-quality crystals has limited their potential as UWBG devices. In this study, B-C-N compounds were synthesized from graphite and hexagonal boron nitride, resulting in layered materials with intercalated graphene layers. The measured optical bandgaps and electronic properties of these compounds can be regulated by the carbon content.
APPLIED PHYSICS LETTERS
(2023)
Article
Multidisciplinary Sciences
Kui Wang, Chang Liu, Guangtao Liu, Xiaohui Yu, Mi Zhou, Hongbo Wang, Changfeng Chen, Yanming Ma
Summary: The article presents experimental evidence for a three-dimensional anomalous metallic state (AMS) in compressed titanium metal, which exhibits unique transport properties. This discovery provides an important platform for further understanding of AMS and its transport behaviors.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Multidisciplinary Sciences
Xiaoyang Wang, Zhenyu Wang, Pengyue Gao, Chengqian Zhang, Jian Lv, Han Wang, Haifeng Liu, Yanchao Wang, Yanming Ma
Summary: This study reported an extensive exploration of the energy landscape of lithium (Li) using an advanced crystal structure search method and a machine learning approach. Four complex Li crystal structures containing up to 192 atoms in the unit cell were predicted, and they were found to be energetically competitive with known Li structures. These findings offer a viable solution to the yet unidentified crystalline phases of Li and demonstrate the predictive power of the global structure search method in conjunction with accurate machine learning potentials for discovering complex crystal structures.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Xin-Ling He, Peiyu Zhang, Yuan Ma, Hefei Li, Xin Zhong, Yanchao Wang, Hanyu Liu, Yanming Ma
Summary: Researchers predict a ternary hydride, YSrH22, by introducing an additional metal element into the binary hydride. The H electron density of states at the Fermi level in YSrH22 is significantly enhanced compared to the parent hydride, which could lead to higher superconductivity.
Article
Materials Science, Multidisciplinary
Xinran Liu, Hong Jian Zhao, Laurent Bellaiche, Yanming Ma
Summary: This article demonstrates the occurrence of sizable Zeeman spin splittings with persistent spin textures in antiferromagnetic semiconductors. By symmetry analysis, the magnetic point groups that can exhibit this effect are identified, providing theoretical guidelines for screening suitable antiferromagnetic materials. First-principles calculations confirm CaTcO3 as an antiferromagnetic semiconductor showcasing sizable Zeeman spin splittings that may be controllable by a magnetic field and accompanied by persistent spin textures.
Article
Materials Science, Multidisciplinary
Guangyang Dai, Yating Jia, Bo Gao, Yi Peng, Jianfa Zhao, Yanming Ma, Changfeng Chen, Jinlong Zhu, Quan Li, Runze Yu, Changqing Jin
Summary: Recently, the hourglass-shaped dispersion of topological insulators (TIs) KHgX (X = As, Sb, Bi) has aroused great interest. These materials, unlike previously tested TIs protected by time-reversal or mirror crystal symmetries, were proposed as the first class of materials whose band topology depends on nonsymmorphic symmetries. As a result, KHgX exhibits many exotic properties, such as hourglass-shaped electronic channels and three-dimensional doubled quantum spin Hall effects. However, there have been minimal high-pressure experimental studies on these nonsymmorphic TIs. In this study, we conducted high-pressure electrical measurements up to 55 GPa, as well as high-pressure X-ray diffraction measurements and high-pressure structure prediction on KHgAs. We observed a pressure-induced semiconductor-metal transition between approximately 16 and 20 GPa, followed by the emergence of superconductivity with a transition temperature (Tc) of around 3.5 K at approximately 21 GPa. The Tc was further enhanced to a maximum of around 6.6 K at 31.8 GPa and then gradually decreased until 55 GPa. Additionally, we observed three high-pressure phases within the range of 55 GPa and determined their crystal structures. Our findings provide insights into the high-pressure phase diagram of KHgAs and unveil the pressure-induced superconductivity in nonsymmorphic TIs, which can facilitate further research on superconductivity and topologically nontrivial features protected by nonsymmorphic symmetries.
NPG ASIA MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Linlin Liu, Yu Xie, John S. Tse, Yanming Ma
Summary: Based on first-principles calculations, it is found that two-dimensional alkali metal indium phosphorus trichalcogenides possess excellent stability and great potential for solar energy conversion, especially in excitonic solar cells with high photovoltaic performance.
MATERIALS ADVANCES
(2023)
