Sudarshan Vijay, Martijn Marsman, Georg Kresse, Martin Schlipf
{"title":"VASP plugins: linking the Vienna<i>ab-initio</i>Simulation Package with Python.","authors":"Sudarshan Vijay, Martijn Marsman, Georg Kresse, Martin Schlipf","doi":"10.1088/1361-648X/aeaf99","DOIUrl":"https://doi.org/10.1088/1361-648X/aeaf99","url":null,"abstract":"<p><p>Implementing novel features and experimental algorithms into widely adopted density functional theory (DFT) codes is frequently hindered by complex legacy architectures and the use of compiled languages such as Fortran. These production codes, while optimized for high-performance computing clusters, present significant hurdles for software development and rapid prototyping, often requiring deep expertise in the code's internal structure to modify. To address this challenge, we present a Python plugin infrastructure for the Vienna<i>ab-initio</i>Simulation Package (VASP) that combines computational efficiency with the flexibility of high-level scripting. Our architecture uses a C++ intermediate layer andto expose VASP data asarrays via shared memory buffers, ensuring high performance without data duplication. We implement two categories of plugins: those that modify quantities at the end of each converged self-consistent field (SCF) cycle, such as,and, and those that operate during the SCF cycle, such as. We demonstrate the utility of our implementation through three applications, structure relaxation using thelibrary, implementing an implicit solvent model, and adding thedispersion corrections. For a representative post-SCF plugin (), this coupling introduces a callback overhead of well underper ionic step relative to a natively linked implementation. This infrastructure effectively bridges the gap between high-performance electronic structure routines and the widespread scientific Python ecosystem.</p>","PeriodicalId":520686,"journal":{"name":"Journal of physics. Condensed matter : an Institute of Physics journal","volume":"38 41","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149229789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lucas H S Cabral, Carlos Maciel O Bastos, Alexandre C Dias, Luiz A Ribeiro Júnior, Rafael Besse
{"title":"Band gap modulation via interlayer twist angle in semiconductor hydrogenated borophene.","authors":"Lucas H S Cabral, Carlos Maciel O Bastos, Alexandre C Dias, Luiz A Ribeiro Júnior, Rafael Besse","doi":"10.1088/1361-648X/aeb0f9","DOIUrl":"10.1088/1361-648X/aeb0f9","url":null,"abstract":"<p><p>Borophene is a compelling 2D material known for its considerable structural diversity, and its lack of a band gap can be overcome by synthesis of hydrogenated borophene, also known as borophane. However, with the realization of semiconductor borophane polymorphs, understanding the mechanisms controlling their band gaps is fundamental, particularly in vertically stacked architectures, where the role of interlayer coupling must be fully elucidated. Here, we investigate the electronic properties of semiconductor borophane bilayers in different stacking arrangements using density functional theory calculations. Our results show weak interlayer binding, with minor effects on bond lengths, low exfoliation energies, and little charge redistribution. In contrast, interlayer coupling of electron states plays an important role in band gaps, mainly by modifying the conduction bands, an effect strongly influenced by the stacking configuration. The linear optical response also depends on the interlayer twist angle and is strongly affected by excitonic effects in this material. These findings establish a fundamental framework for band gap engineering in borophene-based architectures, paving the way for their integration into next-generation nanoelectronic and optoelectronic devices.</p>","PeriodicalId":520686,"journal":{"name":"Journal of physics. Condensed matter : an Institute of Physics journal","volume":"38 42","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149225753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ashutosh S Wadge, Pardeep K Tanwar, Giuseppe Cuono, Carmine Autieri
{"title":"Contemporary insights into electronic structure and microscopic transport in nodal-line semimetals.","authors":"Ashutosh S Wadge, Pardeep K Tanwar, Giuseppe Cuono, Carmine Autieri","doi":"10.1088/1361-648X/ae9662","DOIUrl":"10.1088/1361-648X/ae9662","url":null,"abstract":"<p><p>Topological semimetals have emerged as an important class of quantum materials with novel electronic responses and unconventional transport phenomena. Among them, nodal-line semimetals (NLSMs) are distinguished by band crossings that extend along one-dimensional lines in momentum space rather than occurring at discrete points, forming closed loops, chains, or extended lines. The stability of these nodal structures is governed by crystalline symmetries such as mirror, spin-rotation, and nonsymmorphic operations, which give rise to characteristic topological invariants and surface states, including drumhead-like bands. In this review, we present a comprehensive overview of the theoretical framework and experimental realization of NLSMs, with particular emphasis on symmetry protection and the consequences of symmetry breaking. We discuss the classification of nodal-line structures, their evolution into other topological phases, and their signatures in electronic structure measurements and transport phenomena. Special attention is given to insights obtained from angle-resolved photoemission spectroscopy and related probes. By bringing together symmetry analysis, band topology, and experimental observations, this review aims to clarify the relationship between topology, magnetism, and measurable electronic responses in NLSMs. These considerations highlight their potential as a versatile platform for next-generation topological electronic functionalities and emergent quantum phenomena beyond conventional paradigms.</p>","PeriodicalId":520686,"journal":{"name":"Journal of physics. Condensed matter : an Institute of Physics journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148687591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"2DNL dynamical response of the magnetoelectrically driven dimerized XXZ-chain.","authors":"Wolfram Brenig","doi":"10.1088/1361-648X/aeb697","DOIUrl":"https://doi.org/10.1088/1361-648X/aeb697","url":null,"abstract":"<p><p>A study of the dynamical two-dimensional (2D) nonlinear response of the dimerized spin-1/2 chain to external electric fields is presented. The coupling of the spin system to light is set to arise from the inverse Dzyaloshinskii-Moriya interaction. In the XY-limit, we provide analytical expressions for the second-order nonlinear dynamical response function. Apart from multi spinon continua, this response displays a strong antidiagonal, i.e. galvanoelectric, feature in the 2D frequency plane. This allows to read off scattering rates of the fractional spinon excitations. For the XXZ-case, we focus on the interaction-driven renormalization of the light-matter coupling by considering vertex corrections which are induced by the zz-exchange. We show this renormalization to modify the spinon joint density of states significantly, potentially allowing for the formation of in-gap bound states. As a result, the vertex corrected light-matter coupling can induce a dramatic spectral weight transfer to lower energies for the dynamical response function within the 2D frequency plane.</p>","PeriodicalId":520686,"journal":{"name":"Journal of physics. Condensed matter : an Institute of Physics journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149229804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Liang Zhao, Wenjie Huo, Zhe Zhang, Zonglin Gu, Yusong Tu
{"title":"Structures, properties, and applications of two-dimensional C<sub>3</sub>N and derivatives.","authors":"Liang Zhao, Wenjie Huo, Zhe Zhang, Zonglin Gu, Yusong Tu","doi":"10.1088/1361-648X/aeab1c","DOIUrl":"10.1088/1361-648X/aeab1c","url":null,"abstract":"<p><p>The newly synthesized two-dimensional (2D) carbon nitride with the stoichiometric formula, C<sub>3</sub>N, has attracted extensive attention due to its unusual properties, including high stiffness, remarkable thermal stability and conductivity, enhanced interfacial chemical activity, and promising applications in energy storage and catalysis. Despite its graphene-like honeycomb lattice, C<sub>3</sub>N exhibits an intrinsic heterogeneous surface morphology where each phenyl ring is encircled by six nitrogen atoms, presenting a disrupted<i>π</i>-bond network, charge polarization, and a non-uniform potential surface. In this review, we summarize recent experimental progress and theoretical insights into the electronic, mechanical, thermal, and adsorption properties of 2D C<sub>3</sub>N and its derivatives, ranging from chemically functionalized C<sub>3</sub>N, doped C<sub>3</sub>N, C<sub>3</sub>N bilayers, and quantum dots to van der Waals heterostructures. We further discuss their potential applications in photocatalysis, electrocatalysis, battery electrodes, gas sensors, and biological systems.</p>","PeriodicalId":520686,"journal":{"name":"Journal of physics. Condensed matter : an Institute of Physics journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149027423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Novel phases and superconductivity in indium sulfides under pressure.","authors":"Bangshuai Zhu, Dexi Shao, Cuiying Pei, Qi Wang, Juefei Wu, Yanpeng Qi","doi":"10.1088/1361-648X/aeae00","DOIUrl":"10.1088/1361-648X/aeae00","url":null,"abstract":"<p><p>Recent studies of sulfides have highlighted their potential for exploring unique superconductors under pressure. Here we combine crystal structure predictions with<i>ab initio</i>calculations on the crystal structures, electronic structures and superconducting properties of the In-S system within 80 GPa. We predicted six unique In-S sulfides within five stoichiometries. Among them, In<sub>2</sub>S-<i>C</i>2/<i>m,</i>InS-<i>Fm</i>-3<i>m</i>and InS-<i>Pmmn</i>are thermodynamically stable within certain pressure ranges, whereas In<sub>3</sub>S-<i>P</i>4/<i>nmm</i>, InS<sub>5</sub>-<i>P</i>2<sub>1</sub>/<i>m</i>and InS<sub>6</sub>-<i>P</i>-6 are meta-stable. With the increase of S content, we can observe varied contributions to electronic structures from In and S atoms, and the S-rich phases correspond to better superconductivity in our predicted In-S sulfides. In particular, the S-rich sulfides of InS<sub>5</sub>-<i>P</i>2<sub>1</sub>/<i>m</i>and InS<sub>6</sub>-<i>P</i>-6 stand out with the estimated<i>T</i><sub>c</sub>of about 11 K at 40 GPa and 13 K at 20 GPa, respectively. By analyzing the correlation between bond strength and<i>T</i><sub>c</sub>values of other six binary sulfide systems, we summarized preliminary strategies for designing superconducting sulfides. Our work is helpful for further understanding the phase diagram of In-S system under high pressure, and could provide theoretical support for studying unique superconducting sulfides in experiments.</p>","PeriodicalId":520686,"journal":{"name":"Journal of physics. Condensed matter : an Institute of Physics journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149083782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The challenging path toward high-temperature quantum anomalous hall effect in MnBi<sub>2</sub>Te<sub>4</sub>.","authors":"Liangcai Xu, Yuetan Li, Zichen Lian, Jinsong Zhang","doi":"10.1088/1361-648X/aeb217","DOIUrl":"10.1088/1361-648X/aeb217","url":null,"abstract":"<p><p>Since its experimental discovery as an intrinsic antiferromagnetic topological insulator in 2019, the MnBi<sub>2</sub>Te<sub>4</sub>family of materials has greatly propelled the development of condensed matter physics over the past several years. This family naturally integrates long-range magnetic order with topological band structure within a two-dimensional van der Waals layered material, providing an unprecedentedly clean platform for exploring quantum phenomena such as axion insulators, the quantum anomalous Hall effect, and the topological magnetoelectric effect. However, the transition from fundamental research to practical applications, particularly the realization of high-temperature quantum effects, is confronted with severe challenges in intrinsic defects, magnetic ground-state tuning, and electronic structure engineering. This article aims to review the current development status of the MnBi<sub>2</sub>Te<sub>4</sub>family, focusing on its core quantum phenomena, recent revolutionary breakthroughs in sample preparation techniques, and diverse tuning methods. On this basis, we outline possible pathways toward high-temperature quantum effects through innovations in material synthesis, interface engineering, and multi-strategy tuning and heterostructure engineering.</p>","PeriodicalId":520686,"journal":{"name":"Journal of physics. Condensed matter : an Institute of Physics journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149140284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shereif Y Mujahed, Tsuyoshi Miyazaki, David R Bowler
{"title":"Stress calculation in linear scaling DFT: convergence and dynamics.","authors":"Shereif Y Mujahed, Tsuyoshi Miyazaki, David R Bowler","doi":"10.1088/1361-648X/aeae97","DOIUrl":"10.1088/1361-648X/aeae97","url":null,"abstract":"<p><p>We present the approach needed to calculate stress within density functional theory (DFT) using a localized orbital basis, both for exact diagonalisation and linear scaling approaches, and demonstrate our implementation within the large scale DFT code. For the linear scaling approach, we test the rate of convergence of stress with density matrix range, and compare it to the convergence of energy and forces for different materials with a range of band gaps. We show that excellent convergence is found for modest cutoffs (below 0.1 GPa error for range of 20 a), and show that large-scale isothermal-isobaric molecular dynamics is stable and accurate, showing negligible drift over picoseconds of dynamics.</p>","PeriodicalId":520686,"journal":{"name":"Journal of physics. Condensed matter : an Institute of Physics journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149122725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Spin-dependent electron transfer through a ring-wire coupled junction: role of in-plane electric field.","authors":"Prabhab Patra, Santanu K Maiti","doi":"10.1088/1361-648X/aeb0fa","DOIUrl":"10.1088/1361-648X/aeb0fa","url":null,"abstract":"<p><p>We study spin-dependent transport in a hybrid magnetic system, where a non-magnetic (NM) wire is coupled to a side-attached antiferromagnetic mesoscopic ring, placed between two non-magnetic electrodes subject to an in-plane electric field oriented perpendicular to the NM wire. The system is described within a tight-binding framework, and transport properties are computed using the non-equilibrium Green's function formalism. We consider two junction configurations distinguished by the ring-wire coupling: a single-coupled junction and a double-coupled junction. In the single-coupled configuration, the coupling geometry alone breaks the spin symmetry, yielding a finite spin polarization (SP) even without any external field. The in-plane electric field further enhances the symmetry breaking in both configurations, serving as an efficient tuning parameter that drives the SP nearlyin the low-bias region. In the double-coupled configuration, spin symmetry is preserved in the absence of the external field, and the electric field acts as a sole source of symmetry breaking, producing a large SP. Finite temperature effects and different system sizes are examined, confirming the robustness of the observed features. To validate the findings over a wide parameter space, we considered different sets of parameters and found that the key signatures remain unchanged. Our results demonstrate that such hybrid structures are promising candidates for realizing an externally controllable spintronic device in low-dimensional systems.</p>","PeriodicalId":520686,"journal":{"name":"Journal of physics. Condensed matter : an Institute of Physics journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149122781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Advances in altermagnet-based devices.","authors":"ZhuangEn Fu, Weixiang Ye","doi":"10.1088/1361-648X/aeaaba","DOIUrl":"https://doi.org/10.1088/1361-648X/aeaaba","url":null,"abstract":"<p><p>Altermagnetism has emerged as a third fundamental magnetic phase, uniquely combining the zero net magnetization and ultrafast dynamics of antiferromagnets with spin splitting typically reserved for ferromagnets(FMs). This review provides a systematic overview of the burgeoning field of altermagnets(AMs) and AM-based devices. We first present the symmetry principles that enable non-relativistic spin splitting. Then we examine representative material candidates-ranging from bulk systems to emergent van der Waals layers and metal-organic frameworks, and evaluate their applications in functional devices. Special focus is given to tunneling junctions, anomalous Hall effect sensors, and terahertz (THz) devices. Finally, we discuss methods for electrical and mechanical control of altermagnetic states and the effects between altermagnetism and superconductivity, offering a perspective on the challenges and opportunities for this new paradigm of energy-efficient spintronics.</p>","PeriodicalId":520686,"journal":{"name":"Journal of physics. Condensed matter : an Institute of Physics journal","volume":"38 41","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149225724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}