{"title":"Topological Physics: From Fundamentals to Applications","authors":"Gang Zhang, Xiaotian Wang, Huan Wang","doi":"10.1002/apxr.202400196","DOIUrl":"https://doi.org/10.1002/apxr.202400196","url":null,"abstract":"<p>With recent breakthroughs from fundamentals to applications in topological physics, it should provide a snapshot of the state-of-the-art, both experimental and theoretical, for both experienced and young researchers interested in this subject area. The Special Issue on “Topological Physics: From Fundamentals to Applications” edited by Xiaotian Wang, and Gang Zhang, provides an overview of progress beyond the state of the art for a diverse range of ongoing scientific and technological efforts toward to the forecasting and engineering of the properties of topological physics, opening up exciting opportunities for the prediction, design, fabrication, functionalization, and integration of new and emerging research on topological materials.</p><p>The topological singularity of the scalar field of a microwave supercavity system, excited adjacent to the avoided mode crossing, was observed. Zahra Manzoor et al. [apxr.202200052] experimentally demonstrated that optimizing the high-index dielectric resonator (HIR) dimensions along with a multipolar composition of the strongly coupled excitation source enabled a more compact supercavity system with a higher quality factor.</p><p>Topological magnonics has received a great deal of attention in the past decade owing to its fundamental significance and potential applications. This review provided a comprehensive overview of recent research progress on topological phases of magnons, including Chern insulators, high-order topological insulators, Z2 topological insulators, and topological semimetals of magnons. Additionally, candidate materials and artificial structures suitable for hosting topological magnons were summarized by Fengjun Zhuo et al. [apxr.202300054].</p><p>In the van der Waals heterostructures Gr/CrI<sub>3</sub>, the spin-polarized density of graphene exhibited a non-monotonic change with electric field due to the unstable charge distribution. Jun-Tong Ren et al. [apxr.202300026] reported that when the interface distance was compressed, the enhanced interaction between graphene and CrI<sub>3</sub> stabilized the charge distribution, and the quantum anomalous Hall gap was tuned from 6 to 22 meV.</p><p>Shandite with Ni<sub>3</sub>Pb<sub>2</sub>S<sub>2</sub> chemical formula and <span></span><math></math> symmetry contains the kagome sublattice formed by transition metal atoms. Surajit Basak et al. [apxr.202300025] theoretically investigated the dynamical properties of <i>T</i><sub>3</sub>Pb<sub>2</sub><i>Ch</i><sub>2</sub> (<i>T</i> = Pd,Pt, and <i>Ch</i> = S,Se) with a shandite structure. The studied compounds realized the phonon Dirac nodal points and lines, phonon surface states, while Pt<sub>3</sub>Pb<sub>2</sub>S<sub>2</sub> was unstable and exhibited the structural phase transition from <span></span><math></math> to <span></span><math></math>.</p><p>Topological spintronics was presented without spin-orbit interaction by Muhammad Nadeem et al. [apxr.202300028], where topological switching of ","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202400196","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143595663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthesis and Characterization of Fe-Phthalocyanine-Based Metal–Organic Framework","authors":"Hiroto Oi, Momoka Isobe, Riko Kishikawa, Fumiya Abe, Norihiro Morishita, Shunsuke Takagi, Shota Nakayama, Kaname Kanai","doi":"10.1002/apxr.202400155","DOIUrl":"https://doi.org/10.1002/apxr.202400155","url":null,"abstract":"<p>This paper reports the successful synthesis of Fe-phthalocyanine-based metal-organic framework (FePc-MOF) by simple thermal polymerization. FePc-MOF is a promising candidate for Lieb lattice, which is a type of Dirac materials with two independent sites in a square unit cell, and it is theoretically predicted to have a unique electronic structure featuring both a Dirac band and a flat band near the Fermi level. The prepared samples exhibit the structure of FePc-MOF, as confirmed by X-ray diffraction, Fourier transform infrared spectroscopy, and transmission electron microscopy. The FePc-MOF pellet demonstrates electrical conductivity approximately a thousand times higher than that of its precursor, octacyano-Fe-phthalocyanine. This significant increase in electrical conductivity compared to the precursor indicates that FePc-MOF has a 2D π-electron system with a FePc-based framework and is consistent with the prediction that FePc-MOF is a semiconductor with a narrow energy gap due to its Lieb lattice-like structure. The synthesis method developed in this study is expected to advance fundamental research on Lieb lattices as new electronic and magnetic functional materials.</p>","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202400155","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Altermagnetism in NiSi and Antiferromagnetic Candidate Materials with Non-Collinear Spins","authors":"Deepak K. Singh, Sang-Wook Cheong, Jiasen Guo","doi":"10.1002/apxr.202400170","DOIUrl":"https://doi.org/10.1002/apxr.202400170","url":null,"abstract":"<p>Recently, a new class of magnetic phenomenon, called altermagnetism, is proposed where the underlying spin configuration resembles antiferromagnetic structure, but the system violates <b>PT</b> (PT: Parity times Time reversal) symmetry due to the alternation of crystalline symmetry across magnetic ions. Although the original idea is proposed for the collinear spin structure, a recent report by Cheong et al. has suggested that antiferromagnetic materials with non-collinear spin structure and local alternation of crystalline arrangement can also manifest altermagnetism. Besides breaking the <b>PT</b> symmetry, altermagnetic compounds are also expected to exhibit anomalous Hall effects of odd orders. Here, possible candidates are discussed in this regard. One example is nickel monosilicide, which is recently shown to exhibit high temperature antiferromagnetism with non-collinear spin structure. It fulfills both criteria of breaking the <b>PT</b> symmetry and manifesting nonlinear anomalous Hall effect. In addition to NiSi, other potential antiferromagnetic materials are also discussed with non-collinear spin configuration for the exploration of altermagnetic states.</p>","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202400170","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tao Ding, Christos Tserkezis, Christos Mystilidis, Guy A. E. Vandenbosch, Xuezhi Zheng
{"title":"Quantum Mechanics in Plasmonic Nanocavities: from Theory to Applications","authors":"Tao Ding, Christos Tserkezis, Christos Mystilidis, Guy A. E. Vandenbosch, Xuezhi Zheng","doi":"10.1002/apxr.202400144","DOIUrl":"https://doi.org/10.1002/apxr.202400144","url":null,"abstract":"<p>Quantum mechanical effects in plasmonic nanocavities have attracted strong interest in the last two decades, related to both their experimental realization and implementation in technological applications, and to the challenges that need to be overcome in their theoretical modeling. This review summarizes the basic theories of quantum plasmonics, its modeling strategies, and the material systems that support it. Particularly it is focused on recent progress in quantum plasmonics based on the nanoparticle-on-mirror (NPoM) structure, i.e., plasmonic nanoparticles separated from an underlying metallic substrate via an ultrathin spacer, which provides an elegant route toward cost-effective fabrication of a large number of similar plasmonic cavities. A dramatic shift of research trends is seen from basic modeling to applications in nano-optics, polaritonics, chemistry, and biosensing, gradually making the transition from fundamental, curiosity-driven research to applied science.</p>","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202400144","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Mechanically Strong Active-Site-Enriched Polymer Composite Solid Electrolytes toward Superior Room-Temperature Performance in Lithium Batteries","authors":"Jiaxiao Qi, Yongjing Wang, Haixiong Tang, Jiayu Zhao, Yu Hong, Qiong Li, Ming Jiang, Lijie Dong","doi":"10.1002/apxr.202400166","DOIUrl":"https://doi.org/10.1002/apxr.202400166","url":null,"abstract":"<p>Solid-state electrolytes (SSEs) are promising for lithium batteries with higher safety, cycling stability, and energy density. Among the various SSEs, solid polymer electrolytes (SPEs) are a highly preferred choice due to their high thermal stability, thin design, and good formability. However, polymer electrolytes have low ionic conductivity, for example, polyethylene oxide (PEO), one of the most dominant polyelectrolyte materials, has a low ionic conductivity at room temperature due to its high crystallinity. Theoretically, increasing the ionic active sites by decreasing its crystallinity is an effective strategy, but this may lead to its inability to form films or poor mechanical strength. In this work, the crystallinity of PEO is reduced by introducing succinonitrile (SN), and solution blow-spun polyacrylonitrile (PAN) fiber film is employed as the skeleton of the SPE to provide good mechanical strength. PEO-LiTFSI-SN/PAN SPEs have a tensile strength of at least 4.5 MPa. To provide more Li<sup>+</sup> active sites, PEO-LiTFSI-SN/MXene@PAN composite SPEs are fabricated by doping the PAN fibers with MXene rich in functional groups. The specific capacity of the LFP|PEO-LiTFSI-SN/MXene@PAN|Li button cell reaches 134.8 mAh g<sup>−1</sup> in the first cycle, and the capacity retention rate of 100 cycles is 75.8% at 0.5 C at room temperature.</p>","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202400166","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yi Peng, Xiang Li, Luchuan Shi, Guoqiang Zhao, Jun Zhang, Jianfa Zhao, Xiancheng Wang, Bo Gu, Zheng Deng, Yasutomo J. Uemura, Changqing Jin
{"title":"A Near Room Temperature Curie Temperature in a New Type of Diluted Magnetic Semiconductor (Ba,K)(Zn,Mn)2As2 (Adv. Phys. Res. 1/2025)","authors":"Yi Peng, Xiang Li, Luchuan Shi, Guoqiang Zhao, Jun Zhang, Jianfa Zhao, Xiancheng Wang, Bo Gu, Zheng Deng, Yasutomo J. Uemura, Changqing Jin","doi":"10.1002/apxr.202570001","DOIUrl":"https://doi.org/10.1002/apxr.202570001","url":null,"abstract":"<p><b>Room-temperature ferromagnetism in diluted magnetic semiconductors</b></p><p>Diluted magnetic semiconductors (DMS), which combine the advantages of carrier processes in semiconductors and spin storage in ferromagnets, have significant impacts on generating brand new information technologies. However, achieving room-temperature ferromagnetism in a controllable mode for DMS is a major challenge. In article number 2400124, Bo Gu, Zheng Deng, Changqing Jin and co-workers report experimental enhancement of <i>T<sub>C</sub></i> to a record 260 K for the new-generation DMS material (Ba,K)(Zn,Mn)<sub>2</sub>As<sub>2</sub> (or “BZA”) through high-pressure synthesis that effectively optimizes spin and charge doping.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202570001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143113675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Modulational Instability and Dynamical Growth Blockade in the Nonlinear Hatano–Nelson Model","authors":"Stefano Longhi","doi":"10.1002/apxr.202400154","DOIUrl":"https://doi.org/10.1002/apxr.202400154","url":null,"abstract":"<p>The Hatano–Nelson model is a cornerstone of non-Hermitian physics, describing asymmetric hopping dynamics on a 1D lattice, which gives rise to fascinating phenomena such as directional transport, non-Hermitian topology, and the non-Hermitian skin effect. It has been widely studied in both classical and quantum systems, with applications in condensed matter physics, photonics, and cold atomic gases. Recently, nonlinear extensions of the Hatano–Nelson model have opened a new avenue for exploring the interplay between nonlinearity and non-Hermitian effects. Particularly, in lattices with open boundary conditions, nonlinear skin modes and solitons, localized at the edge or within the bulk of the lattice, have been predicted. In this work, the nonlinear extension of the Hatano–Nelson model with periodic boundary conditions is examined and a novel dynamical phenomenon arising from the modulational instability of nonlinear plane waves: growth blockade is revealed. This phenomenon is characterized by the abrupt halt of norm growth, as observed in the linear Hatano–Nelson model, and can be interpreted as a stopping of convective motion arising from self-induced disorder in the lattice.</p>","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202400154","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Juhyung Park, Jeong Han Song, Jae Gyu Jang, Jeonghun Kwak
{"title":"High Conductivity in PEDOT:PSS Thin-Films by Secondary Doping with Superacid Vapor: Mechanisms and Application to Thermoelectrics","authors":"Juhyung Park, Jeong Han Song, Jae Gyu Jang, Jeonghun Kwak","doi":"10.1002/apxr.202400151","DOIUrl":"https://doi.org/10.1002/apxr.202400151","url":null,"abstract":"<p>Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), a conductive polymer, have attracted attention as promising materials for future electronic applications, owing to its tunable doping level for high electrical conductivity (<i>σ</i>) through simple post-treatments. A novel post-treatment method for conventionally doped PEDOT:PSS thin-films (immersed in methanol) is presented to further enhance <i>σ</i> via doping with the superacid, trifluoromethanesulfonic acid (TFSA). The origin of the improved <i>σ</i> in PEDOT:PSS thin-films treated with this dual approach is investigated. The study reveals that the superacid vapor treatment uniquely enhances the lamellar stacking of PEDOT chains and induces vertical phase separation between PEDOT and PSS, leading to improved carrier mobility by a factor of three. This behavior differs from conventional post-treatments, making the combined methanol immersion and TFSA vapor treatment an effective strategy for achieving a high <i>σ</i> of ≈2053 S cm<sup>−1</sup>, making these films ideal candidates for various polymer-based electronics. Furthermore, the findings demonstrate that the thermoelectric power factor of PEDOT:PSS subjected to secondary doping with superacid vapor exhibits a threefold enhancement (104.2 µW m<sup>−1</sup> K<sup>−2</sup>) compared to samples treated solely with methanol (29.7 µW m<sup>−1</sup> K<sup>−2</sup>). This post-treatment method and the resulting insights will advance the understanding of doping mechanisms and charge transport in conductive polymers.</p>","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202400151","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143920015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Stimuli-Configuring Anisotropic Soft Architectures towards Dynamic Manipulable Photonics","authors":"Xiaoqian Wang, Zhi-Gang Zheng","doi":"10.1002/apxr.202400145","DOIUrl":"https://doi.org/10.1002/apxr.202400145","url":null,"abstract":"<p>This review provides a comprehensive examination of stimuli-configuring anisotropic soft architectures, specifically, stimuli-responsive liquid crystal (LC) artificial micro- and nano-structures, highlighting their unique properties, recent advancements, and diverse applications toward dynamic manipulable photonics. It begins by introducing the fundamentals of LCs, including their classification, key properties, and theoretical modeling approaches. The paper delves into various stimuli—electric fields, light, temperature, and mechanical forces—that trigger changes in LC behavior, with a particular emphasis on photo-responsive systems. In-depth discussions cover electrically driven LC structures, exploring their applications in display technologies and beyond, for example, virtual/augmented reality, holography, and geometric phase optical elements such as lenses, beam shaping and beam steering devices. Light-driven LC structures are analyzed for their remote-control capabilities and roles in switchable optical elements and particle manipulation. The review also examines thermo-responsive and mechanically responsive LC systems, showcasing advanced structures that integrate multiple stimuli for enhanced functionality. Throughout the article, cutting-edge research and innovative applications are highlighted, demonstrating the significant potential of stimuli-responsive LC structures in fields such as optics, photonics, sensing, and information processing. This synthesis of current advancements emphasizes the versatility and adaptability of LCs in responding to various external inputs, paving the way for future technological innovations.</p>","PeriodicalId":100035,"journal":{"name":"Advanced Physics Research","volume":"4 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apxr.202400145","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143920014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}