Altermagnetism has recently emerged as a third fundamental branch of magnetism, combining the vanishing net magnetization of antiferromagnets with the high-momentum-dependent spin splitting of ferromagnets. This study provides a comprehensive real- and momentum-space analysis of topological phases in two-dimensional d-wave altermagnets. By employing a tight-binding Hamiltonian, we characterize the topological phase transition occurring at a critical intra-sublattice hopping strength ($t_a^C$). We examine the emergence of Dirac nodal points and the resulting Berry curvature singularities, supported by a visual analysis of pseudospin texture winding. Crucially, we analize spin splitting, effective altermagnetic strength, and investigate the transport implications of these phases, uncovering giant conductivity anisotropy and spin-dependent ``steering'' effects driven by group velocity distribution across the Fermi surface. Beyond bulk properties, we analyze the edge state topology in ribbon geometries through the lens of information-theoretic markers like fidelity-susceptibility and inverse participation ratio, offering a robust alternative to traditional Chern number calculations, without relying on translational symmetry. Our results demonstrate that the hybridization of edge states in ultra-narrow nanoribbons opens a controllable energy gap, a feature we exploit to propose a novel topological altermagnetic field-effect transistor design where ballistic and spatially spin-polarized transport can be electrostatically gated. This work establishes a theoretical and information-theoretic framework for ``edgetronics'' in altermagnetic materials, paving the way for next-generation, high-speed spintronic and ``spin-splitter'' logic devices and architectures.
Tailoring Corner States and Exceptional Points in Altermagnets
University of Science and Technology Beijing（北京科技大学）；Beijing Normal University（北京师范大学）；China University of Petroleum-Beijing（中国石油大学（北京））；Hebei Normal University（河北师范大学）
Model Hamiltonian for Altermagnetic Topological Insulators
Universidad del Norte（北大学）；Departamento de Física y Geociencias, Universidad del Norte（北大学物理与地球科学系）；Departamento de Matemáticas y Estadística, Universidad del Norte（北大学数学与统计系）
Optical conductivity signature of Van Hove singularity in altermagnetic topological systems
Jiangsu University of Science and Technology（江苏科技大学）；Hubei University（湖北大学）；Southern University of Science and Technology (SUSTech)（南方科技大学）；Nanyang Technological University（南洋理工大学）
Topological Superconductors in Doubly-Coupled Nanowires with Altermagnetism
International Centre for Quantum Design of Functional Materials and Department of Physics, University of Science and Technology of China（中国科学技术大学量子功能材料设计与物理系）；Hefei National Laboratory, University of Science and Technology of China（中国科学技术大学合肥国家实验室）；Wilczek Quantum Center, Shanghai Institute for Advanced Studies, University of Science and Technology of China（中国科学技术大学上海高等研究院斐兹克量子中心）
Second-order topological insulator induced by compensated altermagnetism without bulk spin splitting
College of Physics, Hebei Normal University（河北师范大学物理学院）；International Center for Quantum Materials, School of Physics, Peking University（北京大学物理学院量子材料科学与工程中心）；Hefei National Laboratory（合肥国家实验室）
Dirac edge states as signature of two-dimensional altermagnetic topological crystalline phase
Universitá degli Studi di Milano（米兰大学）；Institute of Physics, Polish Academy of Sciences（波兰科学院物理研究所）；International Research Centre Magtop, Institute of Physics, Polish Academy of Sciences（波兰科学院物理研究所磁顶国际研究中心）；SPIN-CNR, UOS Salerno（萨莱诺统一办公室自旋-意大利国家研究委员会）；Consiglio Nazionale delle Ricerche (CNR-SPIN)（意大利国家研究委员会（CNR-SPIN））
D-Wave Phonon Angular Momentum Texture in Altermagnets by Magnon-Phonon Hybridization
Institute of Physics, Martin Luther University Halle-Wittenberg and Halle-Berlin-Regensburg Cluster of Excellence “Center for Chiral Electronics”（马丁·路德哈雷-维滕贝格大学物理研究所）；Institute of Physics, Otto von Guericke University Magdeburg（奥托·冯·格里克马格德堡大学物理研究所）；Institute of Solid State Theory, University of Münster（明斯特大学固体理论研究所）；Institute of Physics, Johannes Gutenberg University Mainz（约翰内斯·古腾堡美因茨大学物理研究所）
Phase-Controlled Majorana Zero Modes in Altermagnetic Topological-Insulator Josephson Junctions
Huazhong University of Science and Technology（华中科技大学）；Tsung-Dao Lee Institute（李政道研究所）；School of Physics and Astronomy, Shanghai Jiao Tong University（上海交通大学物理与天文学院）；High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences（中国科学院合肥物质科学研究院高磁场实验室）；College of Physics and Optoelectronic Engineering, Department of Physics, Jinan University（暨南大学物理与光电工程学院）；Hefei National Laboratory（合肥国家实验室）；Shanghai Research Center for Quantum Sciences（上海量子科学研究中心）
Light-Induced Topological Phase Transitions and Anomalous Thermal Transport in d-Wave Altermagnets
Quaid i Azam University（奎德·阿扎姆大学）；Khazar University（哈扎尔大学）；Zhejiang Normal University（浙江师范大学）；Institute for Research in Fundamental Sciences (IPM)（基础科学研究所）
Altermagnets Enable Gate-Switchable Helical and Chiral Topological Transport with Spin-Valley-Momentum-Locked Dual Protection
Eastern Institute of Technology（东方理工大学）；University of Science and Technology of China（中国科学技术大学）；Suzhou University of Science and Technology（苏州科技大学）；University at Buffalo, State University of New York（纽约州立大学布法罗分校）
Boltzmann-constrained extraction of spin splitting and momentum relaxation in d-wave altermagnets
College of Physics, Nanjing University of Aeronautics and Astronautics（南京航空航天大学物理学院）；Key Laboratory of Aerospace Information Materials and Physics (NUAA), MIIT（工业和信息化部航空航天信息材料与物理重点实验室）；School of Engineering, Newcastle University（纽卡斯尔大学工程学院）
Circular phonon dichroism in $d$-wave altermagnets
Anhui Key Laboratory of Low-Energy Quantum Materials and Devices, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences（中国科学院合肥物质科学研究院强磁场科学中心低能量子材料与器件安徽省重点实验室）；Department of Physics, University of Science and Technology of China（中国科学技术大学物理学院）；School of Physics and Optoelectronics Engineering, Anhui University（安徽大学物理与光电工程学院）
Dirac points and Weyl phase in a honeycomb altermagnet
Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices, State Key Laboratory of Optoelectronic Materials and Technologies, Center for Neutron Science and Technology, School of Physics, Sun Yat-Sen University（中山大学物理学院）
