Article
Chemistry, Multidisciplinary
Zhenyu Sun, Hui Zhou, Cuixiang Wang, Shiv Kumar, Daiyu Geng, Shaosheng Yue, Xin Han, Yuya Haraguchi, Kenya Shimada, Peng Cheng, Lan Chen, Youguo Shi, Kehui Wu, Sheng Meng, Baojie Feng
Summary: The presence of a breathing kagome lattice in Nb3Cl8 leads to a band gap, but the topological flat bands (TFBs) are preserved. Through experimental observation and computational analysis, we confirm the existence of TFBs and a moderate band gap in Nb3Cl8. Mechanical exfoliation successfully yields stable monolayer Nb3Cl8 under ambient conditions. Additionally, calculations reveal a magnetic ground state in monolayer Nb3Cl8, offering opportunities to study the interplay between geometry, topology, and magnetism.
Article
Multidisciplinary Sciences
Jiangang Yang, Xinwei Yi, Zhen Zhao, Yuyang Xie, Taimin Miao, Hailan Luo, Hao Chen, Bo Liang, Wenpei Zhu, Yuhan Ye, Jing-Yang You, Bo Gu, Shenjin Zhang, Fengfeng Zhang, Feng Yang, Zhimin Wang, Qinjun Peng, Hanqing Mao, Guodong Liu, Zuyan Xu, Hui Chen, Haitao Yang, Gang Su, Hongjun Gao, Lin Zhao, X. J. Zhou
Summary: In this study, the electronic structure of the newly discovered kagome superconductor CsTi3Bi5 is investigated using laser-based angle-resolved photoemission spectroscopy combined with density functional theory calculations. A flat band derived from the destructive interference of Bloch wave functions within the kagome lattice is observed. Type-II and type-III Dirac nodal lines are identified, as well as Z(2) nontrivial topological surface states induced by band inversion mediated by strong spin-orbit coupling.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Man Li, Qi Wang, Guangwei Wang, Zhihong Yuan, Wenhua Song, Rui Lou, Zhengtai Liu, Yaobo Huang, Zhonghao Liu, Hechang Lei, Zhiping Yin, Shancai Wang
Summary: The observation of a Dirac cone, flat band, and saddle point near the Fermi energy in ferromagnetic Kagome material YMn6Sn6 presents potential opportunities for manipulating topological properties and multi-orbital magnetism.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Xiaoran Shi, Weiwei Gao, Hongsheng Liu, Zhen-Guo Fu, Gang Zhang, Yong-Wei Zhang, Tao Liu, Jijun Zhao, Junfeng Gao
Summary: In this study, a 2D sumanene lattice is proposed, which differs distinctively from the conventional Kagome lattice. Theoretical methods are used to suggest two possible routines for stable 2D sumanene monolayers, and an alpha-sumanene monolayer is successfully synthesized and demonstrated to have potential applications in optics. The monolayers also exhibit moderate band gaps and ultrahigh carrier mobilities.
Article
Physics, Applied
Liqiang Zhuo, Huiru He, Ruimin Huang, Zhi Li, Weibin Qiu, Fengjiang Zhuang, Shaojian Su, Zhili Lin, Beiju Huang, Qiang Kan
Summary: In this study, graphene plasmonic crystals (GPCs) with a Kagome lattice were proposed and the properties of the flat band (FB) in the plasmonic system were investigated. By modulating the arrangement of the chemical potentials, a FB was obtained and its authenticity was confirmed through comparison with numerical calculations using a tight-binding modeled Hamiltonian. The proposed Kagome-type GPCs could have significant implications for the study of novel effects in strong interaction systems in the field of plasmonics.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Optics
Haissam Hanafi, Philip Menz, Allan McWilliam, Jorg Imbrock, Cornelia Denz
Summary: This study reports the first experimental realization of oscillating compact localized states arising from multiple flat bands. The experiment observed oscillatory intensity beating during propagation in a 2D photonic decorated Lieb lattice. The results open up new possibilities for understanding the evolution dynamics of light localization in periodic waveguide structures.
Article
Chemistry, Multidisciplinary
Qiangsheng Lu, Congcong Le, Xiaoqian Zhang, Jacob Cook, Xiaoqing He, Mohammad Zarenia, Mitchel Vaninger, Paul F. Miceli, David J. Singh, Chang Liu, Hailang Qin, Tai-Chang Chiang, Ching-Kai Chiu, Giovanni Vignale, Guang Bian
Summary: This study proposes a new method to achieve flat band physics in monolayer graphene by substrate modulation. Experimental results on the graphene/SiC heterostructure demonstrate that substrate modulation leads to Dirac fermion cloning and the proximity of the two Dirac cones in monolayer graphene. Theoretical modeling confirms the cloning mechanism and predicts the emergence of moire flat bands at certain magic lattice constants of the substrate. This study suggests that epitaxial single monolayer graphene on suitable substrates is a promising platform for exploring exotic many-body quantum phases arising from interactions between Dirac electrons.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Qingsong Yu, Zhenzhi Liu, Dawei Guo, Shun Liang, Yanpeng Zhang, Zhaoyang Zhang
Summary: In this study, we demonstrate both experimentally and theoretically the transition of band structure from flatband to type-III Dirac cones in an electromagnetically induced Kagome photonic lattice. By manipulating the intensity of an additional one-dimensional periodic coupling field, the dispersion-less energy band can evolve into type-III Dirac cones with linear dispersion.
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
Physics, Multidisciplinary
Chao Chen, Lu Qi, Kai-Xin Hu, Ji Cao, Wen-Xue Cui, Shou Zhang, Hong-Fu Wang
Summary: The origin of the doubly degenerated completely flat bands and the corresponding compact localized states in a square kagome lattice containing square and triangle plaquettes is investigated. The introduction of external magnetic flux enriches the modulation parameters, leading to many interesting results. The system exhibits tunable completely flat bands with an additional tunable parameter when the magnetic flux penetrates through each square plaquette. Furthermore, when the external magnetic flux penetrates through each triangle plaquette, the system displays a topological nearly flat band, which is useful in realizing fractional quantum Hall physics. The average density of states is calculated to confirm the completely flat bands generated by highly localized eigenstates. Additionally, the implementation of the square kagome lattice system using current photonic waveguide network technology is demonstrated, providing a way to generate tunable completely flat bands and topological nearly flat bands under multi-parameter variable conditions.
ANNALEN DER PHYSIK
(2023)
Article
Chemistry, Physical
Samuel A. Ivko, Katherine Tustain, Tristan Dolling, Aly Abdeldaim, Otto H. J. Mustonen, Pascal Manuel, Chennan Wang, Hubertus Luetkens, Lucy Clark
Summary: Kagome networks in copper-containing metal-organic frameworks (MOFs) have been studied to explore novel quantum and topological states of matter. In this research, a family of MOFs with copper ions and organic linkers was investigated. The magnetic ground state of this family was found to consist of S = 1 ferromagnetic kagome layers coupled antiferromagnetically via the organic linker.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yiwei Li, Shihao Zhang, Fanqiang Chen, Liyang Wei, Zonglin Zhang, Hanbo Xiao, Han Gao, Moyu Chen, Shijun Liang, Ding Pei, Lixuan Xu, Kenji Watanabe, Takashi Taniguchi, Lexian Yang, Feng Miao, Jianpeng Liu, Bin Cheng, Meixiao Wang, Yulin Chen, Zhongkai Liu
Summary: Magic-angle twisted trilayer graphene (MATTG) has shown rich and unique properties, including superconductivity and distinct band structure. Experimental measurements reveal the coexistence of different bands in MATTG, which is crucial for further understanding its unconventional superconductivity.
ADVANCED MATERIALS
(2022)
Article
Physics, Multidisciplinary
Jing Wu, Yue-E Xie, Ming-Xing Chen, Jia-Ren Yuan, Xiao-Hong Yan, Sheng-Bai Zhang, Yuan-Ping Chen
Summary: Studies have shown that the same bilayer twisting approach can be used to isolate the kagome flat bands, with the connected flat bands becoming unstable and potentially leading to spontaneous Wigner crystallization. This may have interesting interplays with other flat-band phenomena such as novel superconductivity and anomalous quantum Hall effect.
Article
Materials Science, Multidisciplinary
Lei Hao
Summary: We demonstrate that narrow zigzag dice lattice ribbons with minimal widths are a unique collection of systems to study physics related to one-dimensional Dirac cones and flat bands. The low-energy band structures of these ribbons exhibit all three combinations of Dirac cones and flat bands. In a perpendicular magnetic field, two of the minimal ribbons show fully pinched spectrum and lead to compact Aharonov-Bohm cages for initially localized wave packets.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Tomonari Mizoguchi, Yoshihito Kuno, Yasuhiro Hatsugai
Summary: The study reveals characteristic band structures of fermions on a square kagome lattice, including flat bands and two spin-1 Dirac cones. Additionally, in the presence of an external field, the profile of the Chern numbers around the modified spin-1 Dirac cones coincides with the conventional one.
Article
Chemistry, Multidisciplinary
Dengfeng Li, Jia He, Guangqian Ding, QiQi Tang, Yan Ying, Junjie He, Chengyong Zhong, Yi Liu, Chunbao Feng, Qilong Sun, Hangbo Zhou, Ping Zhou, Gang Zhang
ADVANCED FUNCTIONAL MATERIALS
(2018)
Review
Physics, Multidisciplinary
Dengfeng Li, Ying Chen, Jia He, Qiqi Tang, Chengyong Zhong, Guangqian Ding
Article
Chemistry, Physical
Junping Hu, Weikang Wu, Chengyong Zhong, Ning Liu, Chuying Ouyang, Hui Ying Yang, Shengyuan A. Yang
Article
Chemistry, Physical
Jia He, Dengfeng Li, Yan Ying, Chunbao Feng, Junjie He, Chengyong Zhong, Hangbo Zhou, Ping Zhou, Gang Zhang
NPJ COMPUTATIONAL MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
Yan Gao, Weikang Wu, Peng-Jie Guo, Chengyong Zhong, Shengyuan A. Yang, Kai Liu, Zhong-Yi Lu
PHYSICAL REVIEW MATERIALS
(2019)
Article
Chemistry, Physical
Chengyong Zhong, Wenxia Zhang, Guangqian Ding, Junjie He
Article
Chemistry, Physical
Yan Gao, Chengyong Zhong, Shengyuan A. Yang, Kai Liu, Zhong-Yi Lu
Summary: In this study, a series of three-dimensional graphene networks with versatile electronic properties, including semiconductor and topological nodal-ring carbon phases, were designed through first-principles calculations. These newly discovered carbon phases show high potential for applications in optoelectronics, photovoltaics, and quantum topological materials, among others.
NPJ COMPUTATIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Xiaowei Jiang, Beida Jiang, Yi Liu, Jinlian Lu, Chengyong Zhong
Summary: In this study, 408 new halogen-containing oxide double perovskites were systematically screened and 14 stable perovskites were confirmed, with 11 of them being previously unreported. Ba2AgIO6 and Sr2AgIO6 were identified as the most preferable candidates for photovoltaic applications.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Chengyong Zhong, Xuelian Li, Chunbao Feng, Peng Yu
Summary: Based on first-principles calculations, a completely flat borophene monolayer known as chi(2/9) with ideal Dirac nodal line states around the Fermi level has been discovered for the first time. A tight-binding model utilizing the Slater-Koster approach demonstrates that the unique electronic feature of chi(2/9) primarily originates from the interactions of the first-nearest neighbors' p(z) orbitals of boron. Symmetry analysis reveals that the Dirac nodal line in chi(2/9) is guaranteed by the out-of-plane mirror or C-2 rotational symmetry and negligible p(z) orbital coupling. Chemical bonding analysis uncovers the rare electronic properties of this material, which can be attributed to the multicentered pi bonds.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Chengyong Zhong, Chunbao Feng
Summary: The researchers proposed a stable borophene oxide, a topological nodal-ring semimetal protected by in-plane mirror symmetry, through theoretical calculations. Their discovery of this new ideal 2D topological nodal-ring semimetal provides a fresh perspective in the search for 2D materials.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Junjie He, Guangqian Ding, Chengyong Zhong, Shuo Li, Dengfeng Li, Gang Zhang
JOURNAL OF MATERIALS CHEMISTRY C
(2019)
Article
Chemistry, Multidisciplinary
Chengyong Zhong, Weikang Wu, Junjie He, Guangqian Ding, Yi Liu, Dengfeng Li, Shengyuan A. Yang, Gang Zhang
Article
Chemistry, Multidisciplinary
Junjie He, Guangqian Ding, Chengyong Zhong, Shuo Li, Dengfeng Li, Gang Zhang
Article
Materials Science, Multidisciplinary
Weikang Wu, Ying Liu, Si Li, Chengyong Zhong, Zhi-Ming Yu, Xian-Lei Sheng, Y. X. Zhao, Shengyuan A. Yang
Article
Materials Science, Multidisciplinary
Yuanping Chen, Shenglong Xu, Yuee Xie, Chengyong Zhong, Congjun Wu, S. B. Zhang
Article
Chemistry, Physical
Jie Sheng, Jingshan He, Dun Ma, Yuanbo Wang, Wu Shao, Tian Ding, Ronghao Cen, Jingwen He, Zhihao Deng, Wenjun Wu
Summary: This study presents an innovative approach to improve the photovoltaic conversion characteristics and stability of perovskite solar cells through carbon electrode interface modification. By in-situ polymerization and carbonization on the surface of nano-graphite, a dendritic structure carbon electrode is formed, reducing the work function and aligning the energy levels with perovskite. This leads to improved charge and hole collection efficiency, resulting in increased photovoltaic conversion efficiency. Furthermore, the modified carbon electrode-based perovskite solar cells exhibit exceptional stability, maintaining high efficiency even without encapsulation.
Article
Chemistry, Physical
Guodong Shi, Jian Song, Xiaoxiao Tian, Tongtong Liu, Zhanjun Wu
Summary: This study demonstrates the improvement of mechanical properties and reduction of coefficient of thermal expansion (CTE) in graphene oxide (GO)/epoxy (EP) nanocomposites by enhancing the interface between GO and EP through functionalization and incorporating rigid-flexible interphases. The results reveal that the SiO2-PEA-GO hybrid exhibits better strengthening and toughening effects, as well as lower CTE, compared to the PEA-GO hybrid due to the presence of rigid-flexible interfaces with higher bonding strength and better energy dissipation mechanisms. Additionally, the nanocomposites with longer polyetheramine (PEA) molecules in the rigid-flexible interphases demonstrate higher strength and toughness, while maintaining a lower CTE. This work provides a promising strategy for constructing adjustable flexible-rigid interfacial structures and offers potential in developing GO/EP nanocomposites with high mechanical properties and low CTE.
Article
Chemistry, Physical
Rafal Janus, Sebastian Jarczewski, Jacek Jagiello, Piotr Natkanski, Mariusz Wadrzyk, Marek Lewandowski, Marek Michalik, Piotr Kustrowski
Summary: In this study, a facile procedure for the synthesis of CMK-1 and CMK-2 carbon replicas was developed. The method utilizes basic laboratory equipment and a renewable carbon source, and operates under mild conditions. The resulting carbon mesostructures exhibit exquisite replication fidelity and structural homogeneity, making them suitable for applications in various fields.
Article
Chemistry, Physical
Anqi Wang, Connor J. MacRobbie, Alex Baranovsky, Jean-Pierre Hickey, John Z. Wen
Summary: In this study, a novel polymer-free nanothermite aerogel with a wide range of nanoparticle loading was fabricated via a new additive manufacturing process. The SEM images showed a unique porous structure formed by extra thin rGO sheets, wrapping individual nanothermite clusters. The DSC-TGA results and high-speed combustion videos confirmed the enhanced energetic performance of the printed specimen.
Article
Chemistry, Physical
Wanze Wu, Misheng Zhao, Shiwei Miao, Xiaoyan Li, Yongzhong Wu, Xiao Gong, Hangxiang Wang
Summary: Superhydrophobic solar-driven interfacial evaporator is an energy-efficient technology for seawater desalination, which is easily fabricated using robust photothermal superhydrophobic coating and substrate. The created bifunctional coating on the melamine sponge substrate shows stable and highly efficient photothermal and superhydrophobic performance for seawater desalination. This superhydrophobic solar-driven interfacial evaporator is expected to have wide applications in seawater desalination.
Article
Chemistry, Physical
Zichen Xiang, Zhi Song, Tiansheng Wang, Menghang Feng, Yijing Zhao, Qitu Zhang, Yi Hou, Lixi Wang
Summary: This study presents a co-electrospinning synthesis strategy to fabricate lightweight and porous Co@C composite nanofibres with wideband microwave attenuation capacity. The addition of MOF-derived Co additives enhances the low-frequency absorption performance.
Article
Chemistry, Physical
J. Snow, C. Olson, E. Torres, K. Shirley, E. Cazalas
Summary: This study investigates the use of a perovskite-based graphene field effect transistor (P-GFET) device for X-ray detection. The sensitivity and responsivity of the device were found to be influenced by factors such as X-ray tube voltage, current, and source-drain voltage. Simulation experiments were conducted to determine the dose rate and energy incident on the device during irradiation.
Article
Chemistry, Physical
Zuzana Jankovska, Lenka Matejova, Jonas Tokarsky, Pavlina Peikertova, Milan Dopita, Karolina Gorzolkova, Dominika Habermannova, Michal Vastyl, Jakub Belik
Summary: This study provides new insights into microwave-assisted pyrolysis of scrap tyres, demonstrating that it can produce microporous carbon black with potential application in xylene adsorption. Compared to conventional pyrolysis, microwave pyrolysis requires less time and energy while maintaining similar adsorption capacity.
Article
Chemistry, Physical
Max Bommert, Bruno Schuler, Carlo A. Pignedoli, Roland Widmer, Oliver Groning
Summary: A detailed understanding of the interaction between molecules and two-dimensional materials is crucial for incorporating functional molecular films into next-generation 2D material-organic hybrid devices. This study compares the energy level alignment of different-sized fullerenes on a Moire superstructure and finds that C-84 fullerenes can be either neutral or negatively charged depending on slight variations of the electrostatic potential. This discovery suggests a new path to achieve ambipolar charge transfer without overcoming the electronic gap of fullerenes.
Article
Chemistry, Physical
Yuanjing Cheng, Xianxian Sun, Ye Yuan, Shuang Yang, Yuanhao Ning, Dan Wang, Weilong Yin, Yibin Li
Summary: The dual-structure aerogel (GS) consisting of flexible silica fibers and graphene honeycomb structures exhibits excellent resilience, flexibility, and reliability. It also shows remarkable wave absorbing performance, making it an ideal candidate for microwave absorption applications such as flexible electronics and aerospace.
Article
Chemistry, Physical
Shuyu Fan, Yinong Chen, Shu Xiao, Kejun Shi, Xinyu Meng, Songsheng Lin, Fenghua Su, Yifan Su, Paul K. Chu
Summary: Graphene coatings are promising solid lubrication materials due to their mechanical properties. This study presents a new method for in situ deposition of high-quality graphene coatings on hard substrates using NiCo solid solution and competitive reaction strategies. The graphene coating deposited on substrates with deep NiCo solid solution demonstrates superior low-friction and durability.
Article
Chemistry, Physical
Mengdi Wang, Sanyin Qu, Yanling Chen, Qin Yao, Lidong Chen
Summary: The improved thermoelectric properties of conducting polymers are achieved by selectively capturing single-walled carbon nanotubes (SWNTs) in a conducting polymer film, leading to increased carrier mobility and reduced thermal conductivity. The resulting composite film exhibits significantly higher electrical conductivity and lower thermal conductivity compared to films with a mixture of SWNTs. This work provides a convenient and efficient method to enhance the thermoelectric properties of conducting polymers.
Review
Chemistry, Physical
Heng Wei, Weihua Li, Kareem Bachagha
Summary: This article reviews the research progress of carbon nanotube-based microwave absorbing materials (MAMs) in recent years, covering the fundamental theory, design strategies, synthesis methods, and future development directions.
Article
Chemistry, Physical
Chenguang Shi, Junlong Huang, Zongheng Cen, Tan Yi, Shaohong Liu, Ruowen Fu
Summary: This study developed a high-performance Li metal host material, which achieved dendrite-free Li deposition with a low nucleation overpotential and high Coulombic efficiencies through the combination of Ti3C2-g-PV4P sheets and Ag nanoparticles. The full cells assembled with the Li@host anode and LiFePO4 cathode exhibited high discharge capacity and excellent cycling stability, demonstrating a perspective design for future energy storage devices.
Article
Chemistry, Physical
Tomotaro Mae, Kentaro Kaneko, Hiroki Sakurai, Suguru Noda
Summary: A new partial prelithiation method for SiO/C-CNT electrodes was developed, which showed reduced irreversible capacity and achieved high energy densities with good reversibility. The method allows for precise control of the degree of prelithiation and is applicable to various chemistries.