Review
Chemistry, Multidisciplinary
Iolanda Di Bernardo, Jack Hellerstedt, Chang Liu, Golrokh Akhgar, Weikang Wu, Shengyuan A. Yang, Dimitrie Culcer, Sung-Kwan Mo, Shaffique Adam, Mark T. Edmonds, Michael S. Fuhrer
Summary: Trisodium bismuthide (Na3Bi) is the first experimentally verified topological Dirac semimetal, showcasing unique physical properties and potential for topological electronic devices. Significant progress has been made in synthesizing large-area thin films via molecular beam epitaxy and studying transport phenomena and topological phase transitions in different doping regimes for Na3Bi.
ADVANCED MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Furu Zhang, Yang Gao, Wei Zhang
Summary: Our systematic studies on the topological aspects of plasmons of Weyl semimetals in the presence of a magnetic field have revealed two types of three-dimensional topological plasmons and proposed the existence of surface/edge plasmons that can be controlled by external fields. Additionally, the anomalous Hall conductivity leads to abundant anisotropic plasmon dispersions.
Article
Chemistry, Multidisciplinary
Dhruv C. Desai, Jinsoo Park, Jin-Jian Zhou, Marco Bernardi
Summary: Bulk Dirac semimetals (DSMs), such as Na3Bi, exhibit unconventional transport properties and phase transitions, but the electronic interactions governing nonequilibrium phenomena in DSMs are not fully understood. Here, we use first-principles calculations to show that electron-phonon (e-ph) interactions in Na3Bi are predominantly two-dimensional. We reveal a 2D optical phonon with strong e-ph interactions associated with in-plane vibrations of Na atoms, which governs e-ph scattering and charge transport in Na3Bi and induces a dynamical phase transition to a Weyl semimetal.
Article
Chemistry, Physical
Wenbin Wu, Zeping Shi, Yuhan Du, Yuxiang Wang, Fang Qin, Xianghao Meng, Binglin Liu, Yuanji Ma, Zhongbo Yan, Mykhaylo Ozerov, Cheng Zhang, Hai-Zhou Lu, Junhao Chu, Xiang Yuan
Summary: The manuscript reports experimental observations of a Lifshitz transition in a topological insulator HfTe5 under a strong magnetic field, leading to the formation of one-dimensional Weyl modes in a three-dimensional material. By tracking the Landau level transitions, the study demonstrates that band inversion drives the crossing of zeroth Landau bands and the formation of a one-dimensional Weyl mode. This transition occurs at 21 T and moves the Weyl mode close to the Fermi level.
Article
Chemistry, Physical
Yaolin Wang, Tielei Song, Yuquan Cheng, Yu Yang, Meichao Liu, Xin Cui, Zhifeng Liu
Summary: This article introduces a new two-dimensional carbon allotrope Tubene assembled by carbon nanotubes and demonstrates its topological properties and multiple quantum states through electronic property analysis. These findings not only enrich the family of carbon allotropes but also provide an assembly strategy for designing new two-dimensional topological materials with desired quantum states.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Multidisciplinary Sciences
Erjian Cheng, Wei Xia, Xianbiao Shi, Hongwei Fang, Chengwei Wang, Chuanying Xi, Shaowen Xu, Darren C. Peets, Linshu Wang, Hao Su, Li Pi, Wei Ren, Xia Wang, Na Yu, Yulin Chen, Weiwei Zhao, Zhongkai Liu, Yanfeng Guo, Shiyan Li
Summary: The study on magnetic topological semimetals found that magnetism-induced topological transition in EuAs3 from a topological nodal-line semimetal to a topological massive Dirac metal. The topological nature in different states was verified by electrical transport measurements and angle-resolved photoemission spectroscopy. Additionally, an extremely large magnetoresistance and a temperature-induced Lifshitz transition were observed, indicating a rich platform for exploring exotic physics.
NATURE COMMUNICATIONS
(2021)
Review
Physics, Multidisciplinary
B. Q. Lv, T. Qian, H. Ding
Summary: Topological semimetals are characterized by bulk band crossings, which have led to increased research activities in the field due to precise theoretical predictions, well-controlled material synthesis, and advanced characterization techniques. The distinct features of these materials include dimensionality, degeneracy, slope and order of band dispersion, topological invariants, and crystallographic symmetries that stabilize band crossings. Additionally, the unique properties of various topological semimetal phases, such as nontrivial surface states and transport responses, have been reviewed.
REVIEWS OF MODERN PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Megha Goyal, M. M. Sinha
Summary: A vibrant research field in condensed matter is the study of topological materials, including topological insulators, Dirac semimetals, and Weyl semimetals. Na3Bi, a predicted Dirac semimetal, has been studied to validate the presence of Dirac cone and to check its stability in different phases for practical applications. It has been found that Na3Bi undergoes a structural phase transition from hexagonal to cubic phase under pressure and satisfies stability criteria for both phases. The material also shows good thermoelectric response at high temperatures, making it a potential candidate for quantum electronic and thermoelectric devices.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Chemistry, Physical
Jia-Yi Lin, Zhong-Jia Chen, Zhipeng Cao, Jiarui Zeng, Xiao-Bao Yang, Yao Yao, Yu-Jun Zhao
Summary: Magnetic topological materials, such as the MnBi2Te4/(Bi2Te3)n family, have attracted attention due to their strong coupling of novel topological properties and magnetic configurations. In this study, we predict that Mn(Bi, Sb)4Se7, the close relatives of MnBi2Te4/(Bi2Te3)n family, exhibit topological properties in both antiferromagnetic and ferromagnetic configurations. The behavior of surface states in these materials depends on the magnetization directions and surface orientations, providing new opportunities for the study of magnetic topological physics.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Jia-Yi Lin, Zhong-Jia Chen, Zhipeng Cao, Jiarui Zeng, Xiao-Bao Yang, Yao Yao, Yu-Jun Zhao
Summary: Magnetic topological materials are attracting attention for their novel topological properties and magnetic configurations. MnBi2Te4/(Bi2Te3)n family, in particular, highlights the research of multiple magnetic topological materials. Based on first-principles calculations, we predict that Mn(Bi, Sb)4Se7, which are close relatives of the MnBi2Te4/(Bi2Te3)n family, have nontrivial topological properties in both antiferromagnetic and ferromagnetic configurations. Our work provides more opportunities for studying magnetic topological physics.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Optics
H. K. Avetissian, V. N. Avetisyan, B. R. Avchyan, G. F. Mkrtchian
Summary: This paper investigates the nonlinear interaction between a Weyl semimetal and a strong driving electromagnetic wave field, analyzing the high-order harmonic generation spectra in the Weyl semimetal with broken time-reversal symmetry. The results show that the spectra in the Weyl semimetal are completely different compared to the two-dimensional graphene case.
Article
Materials Science, Multidisciplinary
Sudip Malick, A. B. Sarkar, Antu Laha, M. Anas, V. K. Malik, Amit Agarwal, Z. Hossain, J. Nayak
Summary: This study investigates the electronic and topological properties of single-crystal SrAl2Si2 through magnetotransport experiments and first-principle calculations. The research reveals several remarkable features at low temperatures, such as large nonsaturating magnetoresistance, Shubnikov-de Haas oscillations, and cusplike magnetoconductivity.
Article
Materials Science, Multidisciplinary
O. J. Franca, Stefan Yoshi Buhmann
Summary: We study how transition radiation is modified by the presence of a generic magnetoelectric medium, with a special focus on topological insulators. We find that the electric field is a superposition of spherical waves and lateral waves, both having a purely topological origin. The main contribution to the radiation in a region far from the interface comes from the spherical waves.
Article
Chemistry, Multidisciplinary
Qian Xia, Na Li, Wei-Xiao Ji, Chang-Wen Zhang, Meng Ding, Miao-Juan Ren, Sheng-Shi Li
Summary: In this paper, a 2D AlSb monolayer is proposed as an excellent candidate for two-dimensional nodal-loop semimetals (NLSM) through systematic first-principles calculations. The AlSb monolayer exhibits fascinating multiple nodal-loop states due to the crossing of conduction and valence bands, which are protected by its glide mirror symmetry. The transport properties of the AlSb monolayer under in-plane uniaxial strains are also investigated, and it is found that both compressive and tensile strains improve its transporting properties.
Article
Materials Science, Multidisciplinary
Xianbiao Shi, Qingbo Liu, Peng He, Yunhuan Yuan, Xiangpeng Kong, Kang Li, Weiwei Zhao
Summary: Based on first-principles calculations, it is predicted that LaPtSi and LaPtGe are Dirac superconducting semimetal candidates with nontrivial topological features. Spin-orbit coupling induces energy level splitting and band reordering, resulting in highly exotic bulk Dirac points and a topological insulator state.
Review
Materials Science, Biomaterials
Zahid Hussain, Dalya Jamal Ahmed, Ranim Mohammed Alkabra, Hnin Ei Thu, Shahzeb Khan, Mohammad Sohail, Rai Muhammad Sarfraz, Nor Amlizan Ramli
Summary: Wound healing is a complex process that can be promoted by using hyaluronic acid. Hyaluronic acid-based nanomedicines have shown significant efficacy in the treatment of different types of skin injuries.
INTERNATIONAL JOURNAL OF POLYMERIC MATERIALS AND POLYMERIC BIOMATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Ro-Ya Liu, Angus Huang, Raman Sankar, Joseph Andrew Hlevyack, Chih-Chuan Su, Shih-Chang Weng, Meng-Kai Lin, Peng Chen, Cheng-Maw Cheng, Jonathan D. Denlinger, Sung-Kwan Mo, Alexei V. Fedorov, Chia-Seng Chang, Horng-Tay Jeng, Tien-Ming Chuang, Tai-Chang Chiang
Summary: This study presents spectroscopic signatures of a predicted topological hourglass semimetal phase in Nb3SiTe6 through angle-resolved photoemission. The results show the existence of linear band crossings and nodal loops, originating from nontrivial Berry phase and predicted glide quantum spin Hall effect. The observation of saddle-like Fermi surface and in situ alkali-metal doping also reveal other band crossings and correlated parabolic bands with accidental nodal loop states.
Article
Chemistry, Multidisciplinary
Qi Liu, Xianyang Lu, Yuxiang Liu, Zhihao Li, Pengfei Yan, Wang Chen, Qinghao Meng, Yongheng Zhang, ChiYung Yam, Liang He, Yu Yan, Yi Zhang, Jing Wu, Thomas Frauenheim, Rong Zhang, Yongbing Xu
Summary: By introducing different contents of Bi adatoms to the surface of monolayer graphene, the carrier concentration and their dynamics have been effectively modulated as probed directly by the time- and angle-resolved photoemission spectroscopy technique. The Bi adatoms are found to assist acoustic phonon scattering events mediated by supercollisions as the disorder effectively relaxes the momentum conservation constraint. A reduced carrier multiplication has been observed, which is related to the shrinking Fermi sea for scattering, as confirmed by time-dependent density functional theory simulation. This work gives insight into hot carrier dynamics in graphene, which is crucial for promoting the application of photoelectric devices.
Article
Multidisciplinary Sciences
Wenjiao Min, Xueli Sun, Nie Tang, Yaoyin Zhang, Fang Luo, Min Zhu, Wei Xia, Bo Zhou
Summary: This study aimed to explore a new treatment model for type 2 diabetes mellitus (DM) based on rhythm regulation under the framework of psychosomatic medicine. By using psychotropics as rhythm regulators, 178 patients with DM were divided into three groups and treated for 16 weeks. After the treatment, blood glucose and glycosylated hemoglobin levels in all three groups decreased, and the incidence of abnormal hypothalamic-pituitary-adrenal axis and somatic symptom scores significantly decreased in the psychotropic treatment group and combined treatment group. These findings suggest that blood glucose control plus rhythm regulation can be considered as optimized treatment goals for DM, and psychotropics have potential value for clinical application as biorhythm regulators.
SCIENTIFIC REPORTS
(2023)
Article
Materials Science, Multidisciplinary
Yuanyuan Ge, Xiaodong Zhang, Sheqiang Han, Bo Zhou, Hui Zhang
Summary: The cooperative Jahn-Teller effect (CJTE) is important in the study of sodium ion batteries with layered transition metal oxides 1T-MO2 (M = Mn, Fe, and Ni) as electrodes. The diffusion process of Na+ ion in these electrode materials has been described using the potential energy surface (PES) approach, revealing a successive distorting-and-hopping process. In pure electrodes, the diffusion barrier of Na+ ion is smaller in FeO2 compared to MnO2 and NiO2. The diffusion mechanism of Na+ in substitutionally doped systems has also been investigated, showing that the cooperative Jahn-Teller effect can be modulated by the substitution of transition metal ions, which impacts the batteries' cycling stability or rate performance.
COMPUTATIONAL MATERIALS SCIENCE
(2023)
Article
Agriculture, Multidisciplinary
Ziqiang Yuan, Bo Zhou, Xiuna Wu, Li Wang, Guiling Li, Jingwen Liu, Qianjin Kang, Daren Wu, Jian Li
Summary: This study isolated and purified a novel antifungal compound, Baelezcin A, from the endophytic bacterium Bacillus velezensis SJ100083. Baelezcin A effectively suppressed gray mold on cherries by inducing reactive oxygen species accumulation in spores and leakage of mycelium cytoplasmal contents, resulting in reduced spore germination. Moreover, it was proven to be biologically safe within a certain range.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2023)
Article
Biochemistry & Molecular Biology
Jian-Yu Wang, Qiu-Yue Li, Li Ren, Cheng Guo, Jian-Ping Qu, Zheng Gao, Hui-Fang Wang, Qian Zhang, Bo Zhou
Summary: Octanoic acid is a nematicide that affects the energy metabolism, lifespan, and signaling of Meloidogyne incognita. It primarily targets the cuticle, lysosomes, and extracellular regions of the nematodes. Nematodes can tolerate low concentrations of octanoic acid by up-regulating defense enzymes and alternative metabolic pathways.
PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY
(2023)
Article
Multidisciplinary Sciences
Xiangtao Jiang, Zhenyu Wu, Siyu Han, Hui Yan, Bo Zhou, Jianjun Li
Summary: The health of trees in forests is crucial for the ecological environment, and the timely detection of Standing Dead Trees (SDTs) plays a significant role in forest management. However, it is challenging to find SDTs using conventional methods like field inventories due to the vast spatial scope of forests. This paper proposes a multi-scale attention mechanism detection method that utilizes deep learning and Unmanned Aerial Vehicle (UAV) technology to identify SDTs in UAV RGB images with high accuracy, effectively improving the efficiency of SDT exploration and assisting in future exploration of other forest species.
Article
Multidisciplinary Sciences
Yekai Song, Chunjing Jia, Hongyu Xiong, Binbin Wang, Zhicheng Jiang, Kui Huang, Jinwoong Hwang, Zhuojun Li, Choongyu Hwang, Zhongkai Liu, Dawei Shen, Jonathan A. Sobota, Patrick Kirchmann, Jiamin Xue, Thomas P. Devereaux, Sung-Kwan Mo, Zhi-Xun Shen, Shujie Tang
Summary: The authors report electronic properties of monolayer ZrTe2 from ARPES and STM measurements that are consistent with the preformed exciton gas phase, a precursor for the excitonic insulator.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Baoshu Wu, Jinlian Lu, Bo Zhou, Zhenjiang Song
Summary: The use of UAVs in agriculture has led to increased productivity, food security, and reduced environmental degradation and population pressure. However, consumer sentiment towards UAVs remains uncertain. This study found that food safety, production safety, and ecological safety had positive impacts on perceived benefits but not on perceived barriers. These factors strongly influenced the adoption of UAV-based plant protection products. Lay beliefs had a positive moderating effect on perceived benefits and barriers. This paper concludes that consumers are developing new consumer ethics that integrate concepts of food safety, safe production, and regional environmental protection with their acceptance of new technology, and policies should be optimized to promote sustainable development based on these findings.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Qinghao Meng, Fan Yu, Gan Liu, Junyu Zong, Qichao Tian, Kaili Wang, Xiaodong Qiu, Can Wang, Xiaoxiang Xi, Yi Zhang
Summary: In this article, high-quality beta-In2Se3 thin films were successfully grown on bilayer graphene substrates using molecular beam epitaxy (MBE). The four-monolayer beta-In2Se3 was found to have a (9 x 1) reconstructed superlattice, while the monolayer beta-In2Se3/BLG heterostructure showed a folding Dirac cone due to interfacial interaction and moire superlattice. After potassium doping, the band gap of In2Se3 film decreased and the valence band maximum shifted in momentum. These experimental results provide a new platform for studying 2D ferroelectric heterostructures and devices.
Article
Multidisciplinary Sciences
Junyu Zong, Zhao-Yang Dong, Junwei Huang, Kaili Wang, Qi-Wei Wang, Qinghao Meng, Qichao Tian, Xiaodong Qiu, Yuyang Mu, Li Wang, Wei Ren, Xuedong Xie, Wang Chen, Yongheng Zhang, Can Wang, Fang-Sen Li, Shao-Chun Li, Jian-Xin Li, Hongtao Yuan, Yi Zhang
Summary: In this study, the van Hove singularity (VHS) in the epitaxial monolayer (ML) 1T-VSe2 film was successfully manipulated by the giant magnified dielectric constant er of SrTiO3(111) substrate with cooling, leading to a two-dimensional (2D) itinerant ferromagnetic state below 3.3 K. The manipulation of VHS was ascribed to the physical origin of the itinerant ferromagnetic state in ML 1T-VSe2, as supported by angle-resolved photoemission spectroscopy (ARPES) and theoretical analysis. These findings demonstrate the potential of controlling the ferromagnetic state in 2D systems through VHS engineering, expanding the application possibilities of 2D magnets for next-generation information technology.
Article
Agronomy
Heng Wang, Jian Hou, Bo Zhou, Xiaoyang Han
Summary: Drought reduces soil NH4+-N concentration and increases NO3--N concentration in tea yields. Drought duration and frequency of dry-wet watering inhibit the activity of AOA, but increase the activity of AOB. Water supply mode affects the relative abundance of AOA and AOB, but not their community structure at the genus level. Ammonia oxidation is primarily driven by AOA and AOB in weakly acidic and neutral soil. This study provides insights into soil nitrogen transformation and ammonia-oxidizing microorganisms under different water supply modes.
Article
Computer Science, Information Systems
Guangliang Pan, Qihui Wu, Guoru Ding, Wei Wang, Jie Li, Bo Zhou
Summary: In this letter, we propose an Autoformer with a series channel-spatial attention module (CSAM) (Autoformer-CSA) for long-term spectrum prediction. The CSAM creatively replaces 2D convolution with 1D convolution in image attention, significantly improving the learning ability of the Autoformer. Experimental results demonstrate that the Autoformer-CSA outperforms state-of-the-art benchmarks.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Ji-Eun Lee, Kyoo Kim, Van Quang Nguyen, Jinwoong Hwang, Jonathan D. Denlinger, Byung Il Min, Sunglae Cho, Hyejin Ryu, Choongyu Hwang, Sung-Kwan Mo
Summary: The thermoelectric performance of SnSe is strongly influenced by the low-energy electron band structure, which provides a high density of states in a narrow energy range due to the multi-valley valence band maximum (VBM). The binding energy of the VBM in SnSe is found to be tuned by the population of Sn vacancies, which is determined by the cooling rate during sample growth, as revealed by angle-resolved photoemission spectroscopy measurements and first-principles calculations. The shift in VBM closely correlates with the thermoelectric power factor, while the effective mass remains largely unchanged with variations in Sn vacancy population. These findings demonstrate that the low-energy electron band structure plays a crucial role in the high thermoelectric performance of hole-doped SnSe, offering a promising route to engineering intrinsic defect-induced thermoelectric performance through sample growth conditions without requiring additional ex-situ processes.
