Article
Materials Science, Multidisciplinary
X. Gu, C. Chen, W. S. Wei, L. L. Gao, J. Y. Liu, X. Du, D. Pei, J. S. Zhou, R. Z. Xu, Z. X. Yin, W. X. Zhao, Y. D. Li, C. Jozwiak, A. Bostwick, E. Rotenberg, D. Backes, L. S. I. Veiga, S. Dhesi, T. Hesjedal, G. van der Laan, H. F. Du, W. J. Jiang, Y. P. Qi, G. Li, W. J. Shi, Z. K. Liu, Y. L. Chen, L. X. Yang
Summary: The researchers systematically investigated the electronic structure of XMn6Sn6 family compounds using high-resolution angle-resolved photoemission spectroscopy and ab initio calculation. They observed that the flat band arising from the magnetic kagome lattice of Mn atoms is located in the same energy region across all compounds, regardless of their different magnetic ground states and 4 f electronic configurations.
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
Physics, Multidisciplinary
Jun Zhang, Ye-Ping Jiang, Xu-Cun Ma, Qi-Kun Xue
Summary: In this study, we visualize the trapping of topological surface states in circular n-p junctions on the top surface of the seven-quintuple-layer three dimensional topological insulator Sb2Te3 epitaxial films. The trapped resonances show field-induced splittings between degenerate time-reversal-symmetric states, which can be attributed to Berry-phase switch. The successful trapping and observation of Berry-phase switch provide a rich platform for developing TI-based quantum devices.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Maia G. Vergniory, Benjamin J. Wieder, Luis Elcoro, Stuart S. P. Parkin, Claudia Felser, B. Andrei Bernevig, Nicolas Regnault
Summary: Topological quantum chemistry and symmetry-based indicators have been used to search for materials with topological properties. This study implemented a publicly accessible catalog of stable and fragile topology in all bands at and away from the Fermi energy (E-F) in the Inorganic Crystal Structure Database. The calculations revealed the symmetry-indicated band topology of known nonmagnetic materials and led to the discovery of repeat-topological and supertopological materials.
Review
Multidisciplinary Sciences
B. Andrei Bernevig, Claudia Felser, Haim Beidenkopf
Summary: Magnetic topological materials have unique properties influenced by the topology of their electronic wave functions and magnetic spin configuration. In this review, we summarize the theoretical and experimental progress in this field and provide an outlook for future research.
Article
Materials Science, Multidisciplinary
Manato Fujimoto, Mikito Koshino
Summary: This study investigates the edge states of twisted bilayer graphene and their topological origin, revealing a special relationship with the moire pattern and the sliding Chern number. The emergence of these moire edge states is linked with topological charge pumping caused by relative interlayer sliding, demonstrating a bulk-edge correspondence inherent in moire bilayer systems.
Article
Materials Science, Multidisciplinary
Santosh Kumar Radha, Walter R. L. Lambrecht
Summary: Annihilating a pair of Dirac fermions leads to a topological transition from the critical semimetallic phase to an obstructed atomic limit insulator phase, instead of a trivial insulator phase. This transition is attributed to branch cuts in the phase of wave functions, resulting in nontrivial Zak phase along certain directions.
Article
Materials Science, Multidisciplinary
Rebecca Engelke, Hyobin Yoo, Stephen Carr, Kevin Xu, Paul Cazeaux, Richard Allen, Andres Mier Valdivia, Mitchell Luskin, Efthimios Kaxiras, Minhyong Kim, Jung Hoon Han, Philip Kim
Summary: In this study, practical and analytical tools are developed to understand the nano-scale moire superlattice structure, which can be applied to other lattice distortions and lattice types. It is found that at large enough moire lengths, all moire systems relax into commensurated 2D domains separated by networks of dislocation lines. These dislocation line networks can be considered as vortexlike topological defects.
Article
Materials Science, Multidisciplinary
Yuwei Zhao, Linghai Zhang, Jianglu Xiang, Xinyu Chen, Chao Zhu, Junfeng Li, Huifang Ma, Xuefen Song, Lin Wang, Chenyang Zha
Summary: Ultrathin niobium diboride (NbB2) nanosheets with topological electronic states are designed to achieve high-activity catalysts, promoting sulfur reduction reaction. The catalyst exhibits stable capacity with 1500 cycles, surpassing most electrode catalysts, making it ideal for lithium-sulfur batteries. These functional Weyl and/or Dirac materials have broad applications in fields such as the hydrogen evolution reaction, nitrogen reduction reaction, and energy conversion.
MATERIALS TODAY PHYSICS
(2023)
Review
Chemistry, Multidisciplinary
Wei Jiang, Xiaojuan Ni, Feng Liu
Summary: Metal-organic and covalent-organic frameworks have unique structural properties such as high porosity and large surface-to-volume ratio, which have led to extensive research for fundamental interests and promising applications. Recent experimental breakthroughs in synthesizing 2D conjugated MOFs/COFs with high conductivity and robust magnetism have sparked renewed interest in their electronic properties. The diversity and high tunability of MOFs/COFs have provided a platform to explore novel quantum physics and chemistry, leading to the discovery of exotic quantum states.
ACCOUNTS OF CHEMICAL RESEARCH
(2021)
Article
Physics, Multidisciplinary
M. Mogi, Y. Okamura, M. Kawamura, R. Yoshimi, K. Yasuda, A. Tsukazaki, K. S. Takahashi, T. Morimoto, N. Nagaosa, M. Kawasaki, Y. Takahashi, Y. Tokura
Summary: In this study, the half-integer quantization of Hall conductance was observed in a synthetic heterostructure called a semi-magnetic topological insulator. The results provide evidence of the condensed matter realization of the parity anomaly and offer a new way to study the physics enabled by a single Dirac fermion.
Correction
Physics, Multidisciplinary
Harris Pirie, Yu Liu, Anjan Soumyanarayanan, Pengcheng Chen, Yang He, M. M. Yee, P. F. S. Rosa, J. D. Thompson, Dae-Jeong Kim, Z. Fisk, Xiangfeng Wang, Johnpierre Paglione, Dirk K. Morr, M. H. Hamidian, Jennifer E. Hoffman
Summary: An amendment to the paper has been published and can be accessed through a link at the top.
Article
Multidisciplinary Sciences
Amit Vashist, R. K. Gopal, Yogesh Singh
Summary: The study reveals unexpected Chiral anomaly-like features in the entire TI state range of Bi1-xSbx alloy, indicating the existence of a field induced WSM state in a broader x range, not just limited to the topological transition near x = 0.03.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Physical
Yan-Fang Zhang, Jinbo Pan, Huta Banjade, Jie Yu, Hsin Lin, Arun Bansil, Shixuan Du, Qimin Yan
Summary: The novel 2D Dirac materials in the MX family exhibit graphene-like band structures with linearly-dispersing Dirac-cone states, high Fermi velocities, and sizable topological band gaps. The electronic and topological properties are highly tunable and could induce topological superconductivity. The MX family shows promise for electronics and spintronics applications.
Article
Materials Science, Multidisciplinary
Xinying Li, Ning Mao, Runhan Li, Ying Dai, Baibiao Huang, Chengwang Niu
Summary: In this study, a topological switch between normal insulator and AFM TI in two-dimensional NaMnBi quintuple layers is theoretically demonstrated. Using first-principles calculations, the researchers investigated the structure, stability, magnetism, and electronic properties, showing that the band gap and topology can be effectively tuned. The results not only expand the understanding of magnetic topological states but also propose potential applications in topological AFM spintronics.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Computer Science, Information Systems
Shengliang Deng, Xiuxian Guan, Zekai Sun, Shixiong Zhao, Tianxiang Shen, Xusheng Chen, Tianyang Duan, Yuexuan Wang, Jia Pan, Yanjun Wu, Libo Zhang, Heming Cui
Summary: In coordinated robotic learning, multiple robots share the same wireless channel for communication. Existing wireless network systems cannot coordinate the latency-sensitive (LS) network flows and bandwidth-hungry (BH) flows effectively. We propose the coordinated preemption method to meet the requirements of both LS and BH flows, achieving better performance in terms of latency violation and learning reward compared to existing systems.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Chemistry, Physical
Dhani Nafday, Christine Richter, Olivier Heckmann, Weimin Wang, Jean-Michel Mariot, Uros Djukic, Ivana Vobornik, Patrick Lefevre, Amina Taleb-Ibrahimi, Julien Rault, Laurent Nicolai, Chin Shen Ong, Patrik Thunstrom, Karol Hricovini, Jan Minar, Igor Di Marco
Summary: In this study, angle-resolved photoemission spectroscopy and density functional theory are used to investigate the electronic structure of self-assembled Bi nanolines on the InAs(100) surface. The results suggest the presence of a flat band associated with the Bi nanolines, indicating a strongly polarized conductivity that makes them suitable for nanowire applications in nanotechnology. The coexistence with an accumulation layer indicates further functionalization potential.
APPLIED SURFACE SCIENCE
(2023)
Article
Computer Science, Artificial Intelligence
Libo Zhang, Junyuan Gao, Zhen Xiao, Heng Fan
Summary: Multi-animal tracking is crucial for animal motion and behavior analysis, but currently lacks dedicated benchmarks. AnimalTrack is introduced as the first benchmark for multi-animal tracking, consisting of 58 sequences. Evaluation of 14 representative trackers shows that most of them perform poorly on multi-animal tracking.
INTERNATIONAL JOURNAL OF COMPUTER VISION
(2023)
Article
Chemistry, Physical
Danil W. Boukhvalov, Gianluca D'Olimpio, Federico Mazzola, Chia-Nung Kuo, Sougata Mardanya, Jun Fujii, Grazia Giuseppina Politano, Chin Shan Lue, Amit Agarwal, Ivana Vobornik, Piero Torelli, Antonio Politano
Summary: In recent years, the correlation between topological electronic states in quantum materials and their catalytic activity has attracted attention. However, the physicochemical mechanisms governing catalysis with quantum materials are not fully understood. This study investigates the reactivity and stability of AuSn4, a topological nodal-line semimetal, and reveals that surface oxidation enhances its catalytic activity for the hydrogen evolution reaction. The peculiar atomic structure of oxidized AuSn4 enables the migration of hydrogen atoms through a Sn-O layer with minimal energy barrier, making it a promising catalyst.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Federico Mazzola, Yanxue Zhang, Natalia Olszowska, Marcin Rosmus, Gianluca D'Olimpio, Marian Cosmin Istrate, Grazia Giuseppina Politano, Ivana Vobornik, Raman Sankar, Corneliu Ghica, Junfeng Gao, Antonio Politano
Summary: Nonmagnetic chiral crystals are a new type of materials that possess Kramers-Weyl Fermions due to the combination of structural chirality, spin-orbit coupling, and time-reversal symmetry. These materials exhibit unique Fermi surfaces with spin-orbit coupling-induced Chern gaps, leading to exotic transport and optical properties. This study investigates the electronic structure and transport properties of CdAs2, a recently discovered chiral material, using angle-resolved photoelectron spectroscopy and density functional theory. The results suggest that CdAs2 is a promising candidate for novel topological properties and provide valuable insights for the development of spintronic and optical devices based on chiral charges and nontrivial Chern numbers.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Review
Behavioral Sciences
Zhenjiang Li, Libo Zhang, Yuxuan Zeng, Qing Zhao, Li Hu
Summary: This study conducted a systematic review and meta-analysis to characterize the temporal, frequential, and spatial characteristics of pain-induced gamma-band oscillations (GBOs) and summarize their functional significance. The study found that GBO heterogeneity was mainly related to pain types, with higher frequency GBOs (-66 Hz) elicited by phasic pain and lower frequency GBOs (-55 Hz) associated with tonic and chronic pains. Positive correlations between GBO magnitudes and pain intensity were observed in healthy participants. Additionally, the characteristics and functions of GBOs appeared to be phylogenetically conserved across humans and rodents.
NEUROSCIENCE AND BIOBEHAVIORAL REVIEWS
(2023)
Article
Chemistry, Analytical
Pan Xiao, Shi Zhang, Libo Zhang, Jialiang Yang, Chaofan Shi, Li Han, Weiwei Tang, Bairen Zhu
Summary: In this paper, a van der Waals heterostructure photodetector based on Ta2NiSe5/WSe2 is presented, utilizing the inherent characteristics of heterostructures. The detector exhibits excellent broad-spectrum detection ability from the visible to the infrared bands at room temperature, achieving an extremely high on/off ratio without the need for an external bias voltage. Additionally, it shows a fast response and low dark currents compared to a pure material detector.
Article
Chemistry, Analytical
Mengjie Jiang, Kaixuan Zhang, Xuyang Lv, Lin Wang, Libo Zhang, Li Han, Huaizhong Xing
Summary: Graphene, a promising material in photodetection applications, is limited by its high dark current for sensitive detection of low-energy photons at room temperature. Our research proposes a new approach by designing lattice antennas with an asymmetric structure combined with high-quality monolayers of graphene, enabling sensitive detection of low-energy photons. The results show that the graphene terahertz detector-based microstructure antenna has a high responsivity, fast response time, and low noise equivalent power, providing a new strategy for the development of room-temperature terahertz photodetectors based on graphene arrays.
Article
Chemistry, Analytical
Yingdong Wei, Chenyu Yao, Li Han, Libo Zhang, Zhiqingzi Chen, Lin Wang, Wei Lu, Xiaoshuang Chen
Summary: Studying the nonlinear photoresponse of different materials in the terahertz field, especially in developing THz detectors with preferred nonlinear plasma-wave mechanisms, is of great importance for advancing performance imaging or communication systems. Shrinking THz detectors raise concerns about the hot-electron effect on device performance and the elusive physical process of THz conversion. A drift-diffusion/hydrodynamic model was implemented to understand the dynamics of carriers and reveal the competitive behavior between nonlinear rectification and hot electron-induced photothermoelectric effect. The optimized source doping concentrations were found to reduce the hot-electron effect on the devices.
Editorial Material
Multidisciplinary Sciences
Libo Zhang, Heng Fan
Article
Materials Science, Multidisciplinary
Turgut Yilmaz, Xuance Jiang, Deyu Lu, Polina M. Sheverdyaeva, Andrey V. Matetskiy, Paolo Moras, Federico Mazzola, Ivana Vobornik, Jun Fujii, Kenneth Evans-Lutterodt, Elio Vescovo
Summary: Transition metal dichalcogenides host interesting electronic order states intertwined with non-trivial band topology. Photoemission experiments on 1T-VSe2 reveal a Dirac nodal arc emerging from band inversion, supporting spin-momentum locked topological surface states. The combination of these properties with a non-trivial band topology opens the possibility of additional exotic states.
COMMUNICATIONS MATERIALS
(2023)
Article
Immunology
Zhoulong Yu, Wenjun Chen, Libo Zhang, Yun Chen, Wenxi Chen, Shiqiu Meng, Lin Lu, Ying Han, Jie Shi
Summary: This study investigates the role of gut microbiota in the incubation of methamphetamine (METH) craving and addiction. The results show that dysbiosis of gut microbiota, damage to the intestinal barrier, and activation of microglia in the brain are involved in the incubation of METH craving. Depleting the gut microbiota prevents the incubation of METH craving and reduces the population of Klebsiella oxytoca bacteria. Manipulating gut-derived bacterial lipopolysaccharide (LPS) levels and microglial morphology can also decrease METH craving after withdrawal.
BRAIN BEHAVIOR AND IMMUNITY
(2023)
Article
Thermodynamics
Linan Dun, Xinyu Yu, Han Wang, Pengmusen Lin, Ziyao Xiong, Xuqiang Guo, Libo Zhang
Summary: This study systematically investigated the oxidative cracking of diformyltricyclodecanes (DFTD) to produce C6-C8 alkenes and alkenes. Experimental results showed that higher temperature, oxygen pressure, and the use of tetrahydrofuran (THF) as solvent were conducive to the generation of cracking products. The kinetics of this reaction were also explored, revealing that higher temperature favored the formation of DFTD cracking products. The findings of this work demonstrated the potential to transform by-products of petroleum and coal into fuels, expanding the application of DFTD and having a significant positive impact on the petroleum and coal chemical industry.
INTERNATIONAL JOURNAL OF LOW-CARBON TECHNOLOGIES
(2023)
Article
Materials Science, Multidisciplinary
Atasi Chakraborty, Jun Fujii, Chia-Nung Kuo, Chin Shan Lue, Antonio Politano, Ivana Vobornik, Amit Agarwal
Summary: We present CoTe2 as a type-II Dirac semimetal hosting Lorentz-symmetry violating Dirac fermions near the Fermi energy. Combining ab initio calculations and experimental results, we find a pair of type-II Dirac fermions in CoTe2 above the Fermi energy. In addition, CoTe2 exhibits several topological band inversions and spin-polarized surface states, including out-of-plane spin polarization. This work establishes CoTe2 as a potential candidate for studying Dirac fermiology and applications in spintronic devices, infrared plasmonics, and ultrafast optoelectronics.
Article
Materials Science, Multidisciplinary
Zhuo Dong, Wenzhi Yu, Libo Zhang, Liu Yang, Luyi Huang, Yan Zhang, Zeqian Ren, Haoran Mu, Cheng Chen, Junrong Zhang, Jie Li, Lin Wang, Kai Zhang
Summary: A facile approach was developed to obtain wafer-scale PtTe2 arrays with high conductivity and good electrical consistency. PtTe2 photodetectors achieved a broadband response, fast response speed, high sensitivity, and high-resolution transmission THz-imaging capability, driven by the Dirac fermions.
