Review
Materials Science, Multidisciplinary
Hong Huang, Toshikaze Kariyado, Xiao Hu
Summary: Topological protection is proposed as a promising method to address the decoherence issue in quantum systems. A scheme is introduced to induce topological excitations in Josephson junction arrays (JJA) by tuning Josephson critical currents on a honeycomb lattice. The system forms hexagonal clusters with different Josephson critical currents, resulting in topologically nontrivial states and topological Josephson plasmon modes at the interface between topological and trivial domains.
OPTICAL MATERIALS EXPRESS
(2021)
Article
Chemistry, Physical
Yaling Zhang, Jingjing Zhang, Wenjia Yang, Huisheng Zhang, Jianfeng Jia
Summary: In this study, we investigate the interplay between spin-orbit coupling and magnetism using first-principles calculations. We find that some honeycomb systems can exhibit topologically trivial states despite having large band gaps. Through theoretical analysis, we identify two types of topologically trivial states and propose methods to achieve topologically nontrivial states by manipulating material properties.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Yipeng An, Jie Li, Kun Wang, Guangtao Wang, Shijing Gong, Chunlan Ma, Tianxing Wang, Zhaoyong Jiao, Xiao Dong, Guoliang Xu, Ruqian Wu, Wuming Liu
Summary: This study investigates the superconductivities and topological properties of MgB2-type diborides using first-principles calculations with different exchange-correlation functionals. It is found that functionals with vdW correction can accurately predict critical temperature and reveal the impact of transition metal elements on superconducting behavior, as well as potential topological surface states.
Article
Thermodynamics
Annika Ott, Svend-Age Biehs
Summary: This study investigates the near-field thermal radiation of topologically protected edge modes in a honeycomb lattice of plasmonic InSb nanoparticles. The results show that the heat transport in the topologically non-trivial phase is dominated by the heat flux channel provided by the edge modes, rather than the bulk modes. This heat flux channel allows for enhanced heat transport along the edges of the honeycomb lattice.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Materials Science, Multidisciplinary
Bahman Sheikhi, Mehdi Kargarian, Abdollah Langari
Summary: This study investigates the interplay of magnons and phonons in honeycomb and kagome lattices, showing that their coupling significantly redistributes the Berry curvature among bands and leads to significant changes in the thermal Hall conductivity of topological magnons.
Article
Physics, Condensed Matter
Kangkang Li
Summary: The study explores the properties of topological magnons in the HK lattice, revealing rich topological phases and transitions with interesting behaviors in the finite thermal Hall conductivity induced by the DM interaction.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Multidisciplinary Sciences
Sebastian Weidemann, Mark Kremer, Stefano Longhi, Alexander Szameit
Summary: Phase transitions in non-Hermitian quasicrystals can be mutually interlinked, and the intertwinement of symmetry breaking, topology, and mobility phase transitions is observed in this study using photonic quantum walks.
Article
Materials Science, Ceramics
A. Vega-Garcia, P. Marino-Castellanos, E. Fernandez-Santiesteban, J. Velazquez-Infante, F. Guerrero, R. Pena-Garcia
Summary: This study investigated the structural, magnetic, and electrical properties of polymer matrix nanocomposites formed by SrFe12O19 hexaferrite and polylactic acid. The results showed the coexistence of both phases, modulation of magnetic properties based on the hexaferrite phase concentrations and magnetic interactions, and wide variability of electrical properties with changes in the phase content.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Yusuke Imai, Terufumi Yamaguchi, Ai Yamakage, Hiroshi Kohno
Summary: This study focuses on the spin-torque and electrical transport properties of Dirac electrons on the surface of magnetic topological insulators. The effects of hexagonal warping on the linear dispersion of surface Dirac electrons are investigated. Different physical properties such as electrical conductivity are found to be greatly influenced by the presence of hexagonal warping. Additionally, current-induced torques with magnetization gradient are studied, revealing the existence of various forms of torques and their behaviors under different conditions.
Article
Materials Science, Multidisciplinary
Soumyajyoti Haldar, Sebastian Meyer, Andre Kubetzka, Stefan Heinze
Summary: Based on density functional theory, significant chiral-chiral interactions are found in hexagonal Mn monolayers, leading to superposition states of spin spirals. Simulations suggest that the distorted 3Q state could be the magnetic ground state of a Mn monolayer on Re(0001).
Article
Optics
Hong Huang, Zhi-yao Ning, Toshikaze Kariyado, Tomohiro Amemiya, Xiao Hu
Summary: We analyze a new type of photonic crystal fiber with distinct topology for the core and cladding by adjusting the position of air holes in each hexagonal unit cell. The p-d band inversion results in topological interface modes within the band gap, which can propagate with a nonzero momentum perpendicular to the fiber's cross section. The helical topological interface modes exhibit pseudospin-momentum locking inherited from the corresponding two-dimensional photonic crystal. Analytical studies of the wave functions for the topological interface modes successfully match the numerical results, providing a novel approach for information transfer using photonic crystal fiber.
Article
Materials Science, Multidisciplinary
BingChen Xia, Xingyuan Huang, Lijun Chang, Ruotong Zhang, Zhikang Liao, Zhihua Cai
Summary: This study proposes a systematic method to optimize the arrangement pattern for 3D honeycomb and 3D re-entrant honeycomb structures in lattice design for energy absorption. A new sample multiplication method is introduced to gather sufficient training data and reduce time consumption by 93.75%. Simulations and experiments demonstrate that the proposed arrangement pattern significantly increases the energy absorption capacity by 43% in equivalent lateral deformation. Furthermore, the combination of different lattice structures and specific local arrangement patterns can alter their mechanical behavior and improve overall performance. This optimization unleashes the design potential of lattice structures and provides reference for future engineering applications.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Physics, Multidisciplinary
Albert F. Adiyatullin, Lavi K. Upreti, Corentin Lechevalier, Clement Evain, Francois Copie, Pierre Suret, Stephane Randoux, Pierre Delplace, Alberto Amo
Summary: By implementing a synthetic photonic lattice in a two-coupled ring system, we have successfully designed an anomalous Floquet metal that exhibits two different topological properties in its gapless bulk. Firstly, this synthetic lattice features bands characterized by a winding number, which emerges from the breakup of inversion symmetry and is directly linked to the appearance of Bloch suboscillations in its bulk. Secondly, the Floquet nature of the lattice leads to well-known anomalous insulating phases with topological edge states. The combination of broken inversion symmetry and periodic time modulation studied here enriches the range of topological phases available in lattices subject to Floquet driving, and suggests the potential emergence of novel phases when periodic modulation is combined with the breakup of spatial symmetries.
PHYSICAL REVIEW LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Xiao-Fang Xu, Jing-Yu Huang, Hao Zhang, Ya-Qi Liu, Nan Zhai
Summary: In this study, a two-dimensional triple-site honeycomb lattice photonic crystal structure is proposed, which can achieve topological phase transitions by changing the position, size, and rotation angle of the dielectric rods. The law of topological phase transition is analyzed by calculating the band structure under different parameters, and a frequency-selective beam splitter is designed based on adjustable topological edge states. Compared with previous studies, this flexible topological system shows more abundant physical phenomena and enriches the implementation of topological photonics in practical applications.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Mechanics
Kanghui Song, Dawei Li, Changdong Zhang, Tingting Liu, Yunlong Tang, Yi Min Xie, Wenhe Liao
Summary: Inspired by natural hierarchical structures, this study proposes a new hierarchical honeycomb design methodology to overcome the shortcomings of conventional honeycomb structures. Through investigating the filling types, principles, and design basis of triangular, square, and circular holes at the microstructure level, a hierarchical honeycomb structure with superior mechanical properties is obtained. Simulation and experiment results show that the hierarchical honeycomb metastructures exhibit significantly improved overall mechanical properties compared with the conventional honeycomb structures, with the hierarchical honeycomb metastructures with circular holes having the best performance improvement.
COMPOSITE STRUCTURES
(2023)