Article
Physics, Applied
Yong Ge, Binjie Shi, Ding Jia, Hong-xiang Sun, Haoran Xue, Shou-qi Yuan, Baile Zhang
Summary: Research has shown that valley acoustic topological insulators (ATIs) with antisymmetric and symmetric distribution nature of valley edge states can be used to design tunable and robust acoustic logic gates (ALGs). By adjusting the phases of input sound sources, logical functions can be switched without changing the structure, making it ideal for various applications.
APPLIED PHYSICS LETTERS
(2023)
Article
Multidisciplinary Sciences
Liping Ye, Chunyin Qiu, Meng Xiao, Tianzi Li, Juan Du, Manzhu Ke, Zhengyou Liu
Summary: Dislocations in solid-state materials have a significant impact on wave propagation due to their topological properties. However, the experimental evidence supporting this observation has been lacking. In this study, the researchers used a 3D acoustic weak topological insulator with controllable dislocations to provide direct experimental evidence for the existence of one-dimensional topological dislocation modes.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
Rui Chen, Tianyu Liu, C. M. Wang, Hai-Zhou Lu, X. C. Xie
Summary: The paper discusses the Fermi-arc mechanism of the 3D quantum Hall effect in Weyl semimetals and proposes a method to achieve one-sided hinge states in Cd3As2-like Dirac semimetals using a tilted magnetic field. Additionally, a new experimental approach to detect these one-sided hinge states is suggested.
PHYSICAL REVIEW LETTERS
(2021)
Review
Nanoscience & Nanotechnology
Haoran Xue, Yihao Yang, Baile Zhang
Summary: Topological acoustics is an emerging field that explores the design and construction of artificial structures to manipulate sound waves using topological protection. Recent research has focused on exploring new topological concepts in physical systems. These developments demonstrate the importance of topological acoustic systems in advancing topological physics.
NATURE REVIEWS MATERIALS
(2022)
Article
Physics, Condensed Matter
Yibao Dong, Yuanbo Wang, Changlin Ding, Shilong Zhai, Xiaopeng Zhao
Summary: A tunable acoustic topological insulator (ATI) with valley-projected edge states is proposed and engineered using a metamaterial structure, demonstrating robust edge sound transport and flexible manipulation of sound propagation paths. Theoretical analysis, numerical simulation, and experimental measurement confirm the existence of edge states, enriching the design of ATIs with tunability and offering potential applications in flexible manipulation of sound propagation.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Optics
Yulin Zhao, Feng Liang, Jianfei Han, Xiangru Wang, Deshuang Zhao, Bing-Zhong Wang
Summary: This paper proposes a new all-dielectric photonic crystal structure with tunable topological edge and corner states through the use of liquid crystals. The structure demonstrates a wider energy gap and robust topological protection, making it suitable for tunable optical waveguides, reconfigurable topological microcavities, and other intelligent topological optical/terahertz devices.
Article
Physics, Applied
Chen Liu, Zhiwang Zhang, Danwei Liao, Zichong Yue, Chengrong Ma, Ying Cheng, Xiaojun Liu
Summary: Over the recent decade, topological insulators have become a focus of research in the field of acoustics due to their unique properties for manipulating wave propagation. However, most studies currently are reported in a complex context, and it is still a challenge to achieve efficient acoustic rainbow trapping in a straightforward setup.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Xuanyi Li, Xifan Xu, Hui Zhou, Huaxian Jia, En Wang, Huixia Fu, Jia-Tao Sun, Sheng Meng
Summary: The emergence of long-range ferromagnetic quantum anomalous Hall (QAH) insulators has opened up new possibilities for combining topology and magnetism in low dimensions. By using atom-thin Chern insulator monolayer MnBr3, the topologically nontrivial electronic states can be systematically tuned by magnetic orders and external fields in stacked Chern insulator bilayers. The bilayers show high-Chern-number QAH states with quantized Hall plateaus and specific magneto-optical Kerr angles in ferromagnetic cases, and Berry curvature singularity induced by electrostatic fields or lasers in antiferromagnetic cases, leading to a novel layer Hall effect depending on the chirality of irradiated circularly polarized light. These findings suggest a universal routine to modulate d-orbital-dominated topological Dirac fermions.
Article
Engineering, Mechanical
Yafeng Chen, Fei Meng, Xiaodong Huang
Summary: This paper introduces a topology optimization approach for designing novel structures of acoustic topological insulators (TIs) and demonstrates the typical functionalities of acoustic TIs, verifying the effectiveness of the proposed method.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Physics, Applied
Shi-Qiao Wu, Zhi-Kang Lin, Bin Jiang, Xiaoxi Zhou, Zhi Hong Hang, Bo Hou, Jian-Hua Jiang
Summary: We experimentally observed a class of bilayer higher-order topological states in twisted moire superlattices (TMSs). The ultrastrong interlayer couplings lead to a large acoustic band gap with unique higher-order band topology and layer-hybridized corner states, which were confirmed by acoustic pump-probe measurements. This study opens up new avenues for exploring higher-order topological phenomena in TMSs.
PHYSICAL REVIEW APPLIED
(2022)
Article
Materials Science, Multidisciplinary
Runhan Li, Ning Mao, Linke Cai, Yingxi Bai, Baibiao Huang, Ying Dai, Chengwang Niu
Summary: In this study, the authors propose that ferroelectric switching can be used to control the topological phase transition between Z2 topological insulators and higher-order topological insulators. They identify a potential material candidate for this transition and highlight the significance of this research for the fields of topological physics and materials.
Article
Chemistry, Multidisciplinary
Yande Que, Yang-Hao Chan, Junxiang Jia, Anirban Das, Zhengjue Tong, Yu-Tzu Chang, Zhenhao Cui, Amit Kumar, Gagandeep Singh, Shantanu Mukherjee, Hsin Lin, Bent Weber
Summary: Atomic monolayers of tungsten ditelluride (WTe2) exhibit a 2D topological excitonic insulator state, and the 2D bulk energy gap can be tuned by gate voltage, providing a novel way to control non-trivial 2D superconductivity with excitonic pairing.
ADVANCED MATERIALS
(2023)
Article
Physics, Multidisciplinary
Shaowen Chen, Minhao He, Ya-Hui Zhang, Valerie Hsieh, Zaiyao Fei, K. Watanabe, T. Taniguchi, David H. Cobden, Xiaodong Xu, Cory R. Dean, Matthew Yankowitz
Summary: Twisted monolayer-bilayer graphene (tMBG) systems exhibit various correlated metallic and insulating states, as well as topological magnetic states. The phase diagram of tMBG can be switched under different perpendicular electric fields, providing a tunable platform for investigating correlated and topological states.
Article
Physics, Applied
Hongqing Dai, Linbo Liu, Baizhan Xia, Dejie Yu
Summary: Acoustic tweezers with excellent biological compatibility have been developed based on topologically protected phononic modes, enabling noncontact label-free microparticle manipulations at an on-chip level.
PHYSICAL REVIEW APPLIED
(2021)
Article
Physics, Applied
Zhen-Dong Duan, Zi-Jian Zhou, Shu Zhu, Wen-Qing Diao, Zheng Liu, Li Fan, Shu-Yi Zhang, Li-Ping Cheng, Xiao-Dong Xu
Summary: In this study, a hydrogen sensor based on an acoustic topological material is created, which detects hydrogen by measuring the shift of the topological interface state. The sensor exhibits an extremely wide operating temperature range and a stable sensitivity.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Coatings & Films
Amir Darabi, Fardad Azarmi
JOURNAL OF THERMAL SPRAY TECHNOLOGY
(2020)
Article
Engineering, Mechanical
Lezheng Fang, Amir Darabi, Alireza Mojahed, Alexander F. Vakakis, Michael J. Leamy
NONLINEAR DYNAMICS
(2020)
Article
Materials Science, Multidisciplinary
Amir Darabi, Fardad Azarmi
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2020)
Article
Multidisciplinary Sciences
Amir Darabi, Manuel Collet, Michael J. Leamy
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2020)
Article
Multidisciplinary Sciences
Amir Darabi, Xiang Ni, Michael Leamy, Andrea Alu
Article
Physics, Applied
Lezheng Fang, Alireza Mojahed, Amir Darabi, Alexander F. Vakakis, Michael J. Leamy
Summary: This paper investigates an elastically linked, nonlinear, in-plane rotator system and experimentally studies its nonreciprocal impulse response. The nonlinearity of the system comes from the angled elastic linkage in rotational motion. Experimental results show that the system can achieve a broadband nonreciprocity when the pretension of the elastic links vanish.
PHYSICAL REVIEW APPLIED
(2021)
Article
Physics, Applied
Amir Darabi, Emily Kliewer, Michael J. Leamy
Summary: By utilizing acoustic waves and drawing inspiration from the quantum Hall effects, mechanical topological insulators have effectively addressed signal transmission challenges in mechanical systems and demonstrated the first mechanical TI-based multiplexer/demultiplexer.
APPLIED PHYSICS LETTERS
(2021)
Article
Acoustics
Emily Kliewer, Amir Darabi, Michael J. Leamy
Summary: A study proposes and fabricates an acoustic topological insulator to guide sound along reconfigurable pathways, observing the quantum valley Hall effect in a hexagonal honeycomb lattice structure. Computational predictions and experimental validation demonstrate the propagation of a topologically protected wave.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2021)
Article
Endocrinology & Metabolism
Caleb J. Rux, Ghazal Vahidi, Amir Darabi, Lewis M. Cox, Chelsea M. Heveran
Summary: Osteocyte perilacunar remodeling affects bone tissue modulus, contributing to bone quality. Differences in perilacunar modulus resulting from osteocyte remodeling activity may impact a substantial amount of bone tissue quality.
Article
Nanoscience & Nanotechnology
Alina M. Martinez, Lewis M. Cox, Amir Darabi, Nicholas J. Bongiardina, Christopher N. Bowman
Summary: Reported here is the design of thioester containing microparticles for the formation of cohesive films through thiol-thioester exchange. The feasibility of particle-based films was demonstrated through characterization and testing of their structural integrity. Additionally, the study showcased the welding of microparticles to a nondynamic network, indicating potential applications in generating materials with differing mechanical properties.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Acoustics
Amin Mehrvarz, Mohammad Javad Khodaei, Amir Darabi, Ahmad Zareei, Nader Jalili
Summary: This article presents the first experimental demonstration of a broadband mechanical beam waveguide that can exhibit wave nonreciprocity. By utilizing spatiotemporal stiffness modulation with piezoelectric patches in a closed-loop controller, the system achieves stability, reconfigurability, and precision over a wide range of frequencies, which distinguishes it from conventional shunted piezoelectrics or nonlinearity based methods. The reconfigurable nonreciprocal system has potential applications in areas such as phononic logic, wave diodes, energy trapping, and localization.
JOURNAL OF VIBRATION AND CONTROL
(2022)
Article
Nanoscience & Nanotechnology
Amir Darabi, Rong Long, Joel C. Weber, Lewis M. Cox
Summary: This article investigates the impact of suture geometry and load direction on the performance of suture joints. Results show that a greater interdigitation of sutures improves composite performance when loading is applied perpendicular to the joints but has deleterious effects when loading is applied parallel to the joints. The study highlights the interplay between suture geometry and crack growth stability after damage initiation occurs under perpendicular loading. These findings could inform the design of engineering composites and bio-inspired structures in the future.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Polymer Science
Ghazal Vahidi, Dilpreet S. Bajwa, Jamileh Shojaeiarani, Nicole Stark, Amir Darabi
Summary: In summary, this passage discusses current research on improving the fire retardancy of polymer materials, emphasizing the importance of nanosized fire retardants and the development of eco-friendly alternatives. It also delves into flame retardation mechanisms and traditional fire characterization techniques.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Proceedings Paper
Engineering, Mechanical
Lezheng Fang, Amir Darabi, Alexander F. Vakakis, Michael J. Leamy
PROCEEDINGS OF THE ASME INTERNATIONAL DESIGN ENGINEERING TECHNICAL CONFERENCES AND COMPUTERS AND INFORMATION IN ENGINEERING CONFERENCE, 2019, VOL 8
(2020)
Article
Materials Science, Multidisciplinary
Amir Darabi, Lezheng Fang, Alireza Mojahed, Matthew D. Fronk, Alexander F. Vakakis, Michael J. Leamy