npj Quantum Materials最新文献

Room-temperature topological spin textures via cobalt substitution in a kagome antiferromagnet kagome反铁磁体中钴取代的室温拓扑自旋织构

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-10-08 DOI: 10.1038/s41535-026-00947-8

Shaohua Fan,Zinan Zhao,Baochun Wu,Zhongchong Lin,Yuxuan Peng,Xiaobai Ma,Jianxiang Gao,Yuanhua Xia,Hao Li,Zhiming Xu,Shilei Ding,Wenyun Yang,Yingying Peng,Zhaochu Luo,Honglin Du,Xingye Lu,Jinbo Yang

引用次数: 0

Non-magnetic ground state in A2WCl6, A = Cs, Rb, K: Face-centered cubic system with spin-orbit-entangled J = 2 states A2WCl6的非磁性基态，A = Cs, Rb， K：面心立方自旋轨道纠缠J = 2态

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-10-03 DOI: 10.1038/s41535-026-00945-w

Tomohiro Takayama, Kenji Ishii, Sebastian Bette, Jürgen Nuss, Yosuke Matsumoto, Katrin Fürsich, Matteo Minola, Dita Puspita Sari, Isao Watanabe, Aleksandra Krajewska, Robert Dinnebier, Bernhard Keimer, Hidenori Takagi

{"title":"Non-magnetic ground state in A2WCl6, A = Cs, Rb, K: Face-centered cubic system with spin-orbit-entangled J = 2 states","authors":"Tomohiro Takayama, Kenji Ishii, Sebastian Bette, Jürgen Nuss, Yosuke Matsumoto, Katrin Fürsich, Matteo Minola, Dita Puspita Sari, Isao Watanabe, Aleksandra Krajewska, Robert Dinnebier, Bernhard Keimer, Hidenori Takagi","doi":"10.1038/s41535-026-00945-w","DOIUrl":"https://doi.org/10.1038/s41535-026-00945-w","url":null,"abstract":"Heavy transition metal compounds with strong spin-orbit coupling have appeared as a platform for d-electron multipolar physics. We report the electronic, magnetic, and structural properties of antifluorite-type tungsten chloride A2WCl6 (A = Cs, Rb, and K), comprising a face-centered cubic lattice of W4+ ions. The 5d2 configuration of W4+ ions yields a spin-orbit-entangled J = 2 state, which splits into a T2g triplet and a non-Kramers Eg doublet under a cubic crystal field. The spin-orbit manifolds have been discussed to give rise to multipolar ordering such as charge quadrupolar or magnetic octupolar ordering. We found that K2WCl6 undergoes a cubic-to-tetragonal structural transition which reconstructs the low-energy J = 2 manifold, leading to a non-magnetic singlet ground state. By contrast, Rb2WCl6 and Cs2WCl6 show no signs of phase transition and remain non-magnetic down to the lowest temperature measured. At low temperatures, signatures of weak structural anomalies were revealed, which may point to the presence of local distortions of the WCl6 octahedra. We argue that the subtle structural distortion arises from the local quadrupolar component, but the presence of chemical disorder likely prevents the formation of long-range multipolar ordering.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"10 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149087853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Layer-decoupled electronic reconstruction and a robust charge density wave in GdTe3 GdTe3中层去耦电子重构和鲁棒电荷密度波

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-09-28 DOI: 10.1038/s41535-026-00946-9

Xin Zheng, Yunbo Wu, Tongrui Li, Yuliang Li, Hui Tian, Zhengming Shang, Zongyi Wang, Yutong Bi, Haoyang Zhou, Lidong Zhang, Guobin Zhang, Yi Liu, Zhanfeng Liu, Shengtao Cui, Zhe Sun

{"title":"Layer-decoupled electronic reconstruction and a robust charge density wave in GdTe3","authors":"Xin Zheng, Yunbo Wu, Tongrui Li, Yuliang Li, Hui Tian, Zhengming Shang, Zongyi Wang, Yutong Bi, Haoyang Zhou, Lidong Zhang, Guobin Zhang, Yi Liu, Zhanfeng Liu, Shengtao Cui, Zhe Sun","doi":"10.1038/s41535-026-00946-9","DOIUrl":"https://doi.org/10.1038/s41535-026-00946-9","url":null,"abstract":"Two-dimensional van der Waals materials host a variety of intertwined quantum phases, whose deterministic control remains a central challenge. The rare-earth tritellurides (RTe3), a model system for charge density wave (CDW) physics, offer a unique platform to study the response of a collective electronic order to external perturbations. Here, using angle-resolved photoemission spectroscopy (ARPES) and first-principles calculations, we investigate the electronic structure of GdTe3 under in-situ potassium deposition. We find that the doped electrons trigger a highly selective, layer-decoupled electronic reconstruction. Bands primarily derived from the Gd-Te slabs accommodate the additional charge, exhibiting large downward energy shifts, while electronic states localized on the Te square-net layers, which host the CDW, remain remarkably inert. This electronic separation is accompanied by a marked reduction in the interlayer hybridization, which indicates a weakening of electronic communication between the layers. This mechanism provides a direct explanation for the observed, anomalous robustness of the CDW, which persists with its characteristic energy gap largely unperturbed despite the significant increase in the global Fermi level. Our findings demonstrate an “internal shielding” mechanism, where one atomic layer accommodates external charge perturbations to protect collective order in an adjacent layer, providing a new approach for selective control in layered materials.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"58 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149087855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation of topological X-gates via braiding of Majorana zero modes in an interacting quantum-dot system 相互作用量子点系统中马约拉纳零模式编织的拓扑x门模拟

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-09-21 DOI: 10.1038/s41535-026-00944-x

Bradraj Pandey, Cole Peeters, Satoshi Okamoto, Pontus Laurell, Stephan Rachel, Elbio Dagotto

{"title":"Simulation of topological X-gates via braiding of Majorana zero modes in an interacting quantum-dot system","authors":"Bradraj Pandey, Cole Peeters, Satoshi Okamoto, Pontus Laurell, Stephan Rachel, Elbio Dagotto","doi":"10.1038/s41535-026-00944-x","DOIUrl":"https://doi.org/10.1038/s41535-026-00944-x","url":null,"abstract":"Recent advances in quantum dot platforms have opened a new platform for realizing Majorana zero modes (MZMs) and simulating topological quantum computation. Here we propose an experimentally feasible setup for implementing topological (sqrt{X})- and X-quantum gates in an interacting Y-shaped quantum-dot array. The proposed architecture enables both braiding and charge readout through simple fusion operations controlled by gate-tunable potentials. Using many-body time-dependent exact diagonalization, we analyze MZM braiding and fusion dynamics in the presence of nearest-neighbor Coulomb interactions, hopping-pairing mismatch, onsite charge fluctuations, and pairing disorder. We compute diabatic errors, braiding fidelity, and the time- and space-resolved electron and hole components of the local density of states to monitor the braiding process. Our results show that even weak interactions or pairing disorder induce oscillations in the braiding fidelity, thereby setting an upper bound on the braiding speed. Furthermore, we demonstrate that comparing fusion outcomes before and after double braiding provides a direct and experimentally accessible signature of the non-Abelian nature of MZMs in quantum-dot systems.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"19 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149010559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microscopic theory revealing Ising criticality with distinct sublattice orders in extended Kitaev chains 揭示扩展Kitaev链中不同亚格序的Ising临界的微观理论

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-09-15 DOI: 10.1038/s41535-026-00943-y

Mandev Bhullar, Philip Richard, Hae-Young Kee

引用次数: 0

Controlling magnetic interactions in α-RuCl3 by strain 通过应变控制α-RuCl3中的磁相互作用

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-09-12 DOI: 10.1038/s41535-026-00939-8

A. Koitzsch, T. Klaproth, O. Janson, A. A. Popov, M. Knupfer, B. Büchner

引用次数: 0

Kugel-Khomskii materials Kugel-Khomskii材料

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-09-09 DOI: 10.1038/s41535-026-00942-z

Erik Koch, Eva Pavarini

{"title":"Kugel-Khomskii materials","authors":"Erik Koch, Eva Pavarini","doi":"10.1038/s41535-026-00942-z","DOIUrl":"https://doi.org/10.1038/s41535-026-00942-z","url":null,"abstract":"The Kugel-Khomskii super-exchange mechanism for orbital ordering is a pillar of orbital physics. Besides orbital phase transitions, it can give rise to a plethora of emergent phenomena, from exotic magnetic states, orbital-liquid phases, hidden order and much more. Yet, to identify real systems in which orbital-ordering arises purely from the Kugel-Khomskii mechanism has been a challenge. The first obstacle was that ions with orbital degrees of freedom are also of the Jahn-Teller kind. This poses a chicken-and-egg problem: electronic ordering can give rise to distortions and distortions can give rise to orbital ordering. This problem was eventually solved, showing that the two effects can be indeed disentangled. From this the next obstacle emerged: lattice distortions are very efficient in freezing orbital fluctuations, hampering the effects of orbital super-exchange. Thus, in most systems, orbital ordering occurs well above <italic>T</italic><sub>KK</sub>, the critical temperature at which super-exchange can drive it. Representative Kugel-Khomskii systems were recently identified, however. The understanding gained provides guidelines for finding Kugel-Khomskii materials. It also indicates that experimental signatures of the Kugel-Khomskii mechanism should be mostly searched via the primary effect, electronic and magnetic properties, rather than the secondary effect, lattice distortions.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"65 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149003658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Confined conduction channels near a metal-insulator transition 金属绝缘体过渡附近的受限传导通道

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-09-08 DOI: 10.1038/s41535-026-00928-x

T. R. Devidas,Dror Yahav,Jonathan T. Reichanadter,Matan Sterenberg,Shannon C. Haley,Joel E. Moore,Jeffrey B. Neaton,James G. Analytis,Beena Kalisky,Eran Maniv

{"title":"Confined conduction channels near a metal-insulator transition","authors":"T. R. Devidas,Dror Yahav,Jonathan T. Reichanadter,Matan Sterenberg,Shannon C. Haley,Joel E. Moore,Jeffrey B. Neaton,James G. Analytis,Beena Kalisky,Eran Maniv","doi":"10.1038/s41535-026-00928-x","DOIUrl":"https://doi.org/10.1038/s41535-026-00928-x","url":null,"abstract":"Abstract Materials that transition between metal and insulator, the two main states that distinguish all solids, are fascinating because they underlie many mysteries at the frontier of solid-state physics. In 1T-TaS 2 , the metal-insulator transition is linked to a metastable hidden state arising within a chiral charge density wave (CDW) whose basic nature remains an open question. In this work, we show that pulses of current through this material create current-carrying filamentary channels that distinguish the ‘metallic’ hidden state and the ‘insulating’ CDW states. These channels have remained undetected in previous measurements and yet are directly linked to the properties of the hidden state. We leverage the metastability of these conduction channels to demonstrate electrical control of their creation, erasure and location. Our findings show that physical elements such as boundaries and interfaces play a key role in the properties of the hidden state characterizing the metal-insulator transition. We propose new possibilities for in-situ electrical design of reconfigurable conductive networks, highlighting the broader device potential of these metastable states.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"69 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148923437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surface phonon Hall viscosity induced phonon chirality and nonreciprocity in magnetic topological insulator films 磁性拓扑绝缘体薄膜中表面声子霍尔粘度诱导声子手性和非互易性

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-09-05 DOI: 10.1038/s41535-026-00940-1

Abhinava Chatterjee,Chao-Xing Liu

引用次数: 0

RIXS observation of bond-directional excitations in the Kitaev material Na2IrO3 Kitaev材料Na2IrO3中键定向激发的RIXS观测

IF 5.7 1区物理与天体物理

npj Quantum Materials Pub Date : 2026-09-03 DOI: 10.1038/s41535-026-00938-9

Marco Magnaterra,Karolin Hopfer,Christoph J. Sahle,Marco Moretti Sala,Giulio Monaco,Jan Attig,Ciarán Hickey,Ina-Marie Pietsch,Franziska Breitner,Philipp Gegenwart,Mary H. Upton,Jungho Kim,Simon Trebst,Paul H. M. van Loosdrecht,Jeroen van den Brink,Markus Grüninger

{"title":"RIXS observation of bond-directional excitations in the Kitaev material Na2IrO3","authors":"Marco Magnaterra,Karolin Hopfer,Christoph J. Sahle,Marco Moretti Sala,Giulio Monaco,Jan Attig,Ciarán Hickey,Ina-Marie Pietsch,Franziska Breitner,Philipp Gegenwart,Mary H. Upton,Jungho Kim,Simon Trebst,Paul H. M. van Loosdrecht,Jeroen van den Brink,Markus Grüninger","doi":"10.1038/s41535-026-00938-9","DOIUrl":"https://doi.org/10.1038/s41535-026-00938-9","url":null,"abstract":"Abstract Spin-orbit coupling locks spin direction and spatial orientation and generates, in semi-classical magnets, a local spin easy-axis and associated ordering. Quantum spin-1/2’s defy this fate: rather than spins becoming locally anisotropic, the spin-spin interactions do. Consequently interactions become dependent on the spatial orientation of bonds between spins, prime theoretical examples of which are Kitaev magnets. Bond-directional interactions imply the existence of bond-directional magnetic modes, spin excitations that render crystallographically equivalent bonds magnetically inequivalent, which yet have remained elusive experimentally. Here we show that resonant inelastic X-ray scattering allows us to explicitly probe the bond-directional character of magnetic excitations. To do so, we use a scattering plane spanned by one bond and the corresponding spin component and scan a range of momentum transfer that encompasses multiple Brillouin zones. Applying this approach to Na 2 IrO 3 we establish the different bond-directional characters of magnetic excitations at ~10 meV and ~45 meV. The bond-directional nearest-neighbor excitations are a fingerprint of the dominant Kitaev interactions and even prevail in the magnetically ordered state.","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"11 1","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148894057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0