Communications Materials最新文献_第6页

Modelling freckles and spurious grain formation in directionally solidified superalloy castings 定向凝固超耐热合金铸件中的雀斑和假晶粒形成建模。

IF 7.5

Communications Materials Pub Date : 2024-10-19 DOI: 10.1038/s43246-024-00672-4

Haijie Zhang, Yunxing Zhao, Wei Xiong, Dexin Ma, Andreas Ludwig, Abdellah Kharicha, Menghuai Wu

{"title":"Modelling freckles and spurious grain formation in directionally solidified superalloy castings","authors":"Haijie Zhang, Yunxing Zhao, Wei Xiong, Dexin Ma, Andreas Ludwig, Abdellah Kharicha, Menghuai Wu","doi":"10.1038/s43246-024-00672-4","DOIUrl":"10.1038/s43246-024-00672-4","url":null,"abstract":"Segregation channels with misoriented spurious grains, known as freckles, are an unacceptable casting defect in superalloy turbine blades. A digital-twin method to predict segregation channels was proposed in our previous studies; however, the formation of spurious grains was ignored. Here, we extend the digital twin methodology by incorporating dendrite fragmentation, which is recognized as the predominant mechanism in the formation of spurious grains. The flow-induced fragmentation process has been refined to account for the timing of dendrite pinch-off. A three-phase mixed columnar-equiaxed solidification model was used to track the motion of the crystal fragments. Directional solidification experiments for superalloy casting were conducted in an industrial-scale Bridgman furnace, and the distribution of spurious grains in the freckles was metallographically analysed. Excellent simulation-experiment-agreement was achieved. Based on this study, the formation of spurious grains within the segregation channels is mainly caused by the flow-driven fragmentation mechanism. Experimentally measured freckles can be reproduced only if the timing of the dendrite pinch-off is considered. Defect-free castings are vital to the structural integrity of superalloys used in aerospace. Here, a digital twin method is developed for modelling spurious grain formation and segregation channels in directionally solidified superalloys.","PeriodicalId":10589,"journal":{"name":"Communications Materials","volume":" ","pages":"1-12"},"PeriodicalIF":7.5,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11489085/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142459884","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}

引用次数: 0

Phase-separated polymer blends for controlled drug delivery by tuning morphology 相分离聚合物共混物通过调整形态实现可控给药

IF 7.5

Communications Materials Pub Date : 2024-10-18 DOI: 10.1038/s43246-024-00678-y

Martina Olsson, Robin Storm, Linnea Björn, Viktor Lilja, Leonard Krupnik, Yang Chen, Polina Naidjonoka, Ana Diaz, Mirko Holler, Benjamin Watts, Anette Larsson, Marianne Liebi, Aleksandar Matic

{"title":"Phase-separated polymer blends for controlled drug delivery by tuning morphology","authors":"Martina Olsson, Robin Storm, Linnea Björn, Viktor Lilja, Leonard Krupnik, Yang Chen, Polina Naidjonoka, Ana Diaz, Mirko Holler, Benjamin Watts, Anette Larsson, Marianne Liebi, Aleksandar Matic","doi":"10.1038/s43246-024-00678-y","DOIUrl":"10.1038/s43246-024-00678-y","url":null,"abstract":"Controlling drug release rate and providing physical and chemical stability to the active pharmaceutical ingredient are key properties of oral solid dosage forms. Here, we demonstrate a formulation strategy using phase-separated polymer blends where the morphology provides a route for tuning the drug release profile. By utilising phase separation of a hydrophobic and a hydrophilic polymer, the hydrophilic component will act as a channelling agent, creating a porous network upon dissolution that will dictate the release characteristics. With ptychographic X-ray tomography and scanning transmission X-ray microscopy we reveal how the morphology depends on both polymer fraction and presence of drug, and how the drug is distributed over the polymer domains. Combining X-ray imaging results with dissolution studies reveal how the morphologies are correlated with the drug release and showcase how tuning the morphology of a polymer matrix in oral formulations can be utilised as a method for controlled drug release. Drug delivery via solid oral dosage requires a controlled release rate and physical and chemical stability of the drug within the formulation. Here, X-ray tomography and spectromicroscopy reveal how the morphology of a phase-separated polymer blend controls drug release.","PeriodicalId":10589,"journal":{"name":"Communications Materials","volume":" ","pages":"1-8"},"PeriodicalIF":7.5,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43246-024-00678-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142574267","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}

引用次数: 0

Shrinkable muscular crystal with chemical logic gates driven by external ion environment 由外部离子环境驱动化学逻辑门的可收缩肌肉晶体

IF 7.5

Communications Materials Pub Date : 2024-10-16 DOI: 10.1038/s43246-024-00674-2

Jun Manabe, Mizuki Ito, Katsuya Ichihashi, Katsuya Inoue, Yin Qian, Xiao-Ming Ren, Ryo Tsunashima, Tomoyuki Akutagawa, Takayoshi Nakamura, Sadafumi Nishihara

{"title":"Shrinkable muscular crystal with chemical logic gates driven by external ion environment","authors":"Jun Manabe, Mizuki Ito, Katsuya Ichihashi, Katsuya Inoue, Yin Qian, Xiao-Ming Ren, Ryo Tsunashima, Tomoyuki Akutagawa, Takayoshi Nakamura, Sadafumi Nishihara","doi":"10.1038/s43246-024-00674-2","DOIUrl":"10.1038/s43246-024-00674-2","url":null,"abstract":"Biomimetic chemical logic gates that can reversibly transform their shape and physical properties in response to their environment are an important research field. Most artificial chemical logic gates, however, rely on changes in the microscopic properties of molecules and ions in solution. Hence, developing chemical logic gates that influence macroscopic properties, such as crystal structures and magnetic and electrical properties, is essential for mimicking in vivo phenomena more accurately. Here, we develop a reset-set flip-flop circuit based on a single crystal that reversibly transforms in the presence of Ca2+ ions in aqueous solutions and is analogous to the chemical logic gate in muscles. During the crystal transformation, the lattice volume undergoes ~39% shrinkage, and the magnetic and electrical properties change considerably. Compared with existing products, the constructed crystalline system more closely resembles the function of actual muscles, which is promising for advancing the field of biomimetics. Biomimetic chemical logic gates transform in response to their environment but are currently focused on the microscopic properties. Here, a single crystal reset-set flip-flop circuit undergoes reversible volume shrinkage in response to ions in solution.","PeriodicalId":10589,"journal":{"name":"Communications Materials","volume":" ","pages":"1-7"},"PeriodicalIF":7.5,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43246-024-00674-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142443606","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}

引用次数: 0

Design of stimuli-responsive minimalist heptad surfactants for stable emulsions 设计用于稳定乳液的刺激响应型最小七元表面活性剂

IF 7.5

Communications Materials Pub Date : 2024-10-15 DOI: 10.1038/s43246-024-00670-6

Yang Li, Yilun Weng, Yue Hui, Jiaqi Wang, Letao Xu, Yang Yang, Guangze Yang, Chun-Xia Zhao

{"title":"Design of stimuli-responsive minimalist heptad surfactants for stable emulsions","authors":"Yang Li, Yilun Weng, Yue Hui, Jiaqi Wang, Letao Xu, Yang Yang, Guangze Yang, Chun-Xia Zhao","doi":"10.1038/s43246-024-00670-6","DOIUrl":"10.1038/s43246-024-00670-6","url":null,"abstract":"Peptide surfactants have been extensively investigated with various applications in detergents, foods, and pharmaceutics due to their biodegradability, biocompatibility, and customizable structures. Traditional peptide surfactants are often designed in a head-to-tail fashion mimicking chemical surfactants. Alternatively, a side-by-side design pattern based on heptad repeats offers an approach to designing peptide surfactants. However, minimalist peptide design using a single heptad for stabilizing interfaces remains largely unexplored. Here, we design four heptad surfactants (AM1.2, 6H, 6H7K, and HK) responsive to metal ions and compare their emulsification performance with a three-heptad peptide, AM1. Among them, the HK peptide generates emulsions exhibiting good stability over months. We further optimize factors such as buffering salts, ionic strength, and emulsion dilutions to uncover their impacts on emulsion properties. Our findings deepen the understanding of emulsion properties and provide practical insights for characterizing peptide-based emulsions, paving the way for their broader utilization in diverse applications. Peptide surfactants are useful in detergents, foods, and pharmaceutics but their design using a single heptad remains largely unexplored. Here, four heptad surfactants were designed that are responsive to metal ions and show good emulsification properties.","PeriodicalId":10589,"journal":{"name":"Communications Materials","volume":" ","pages":"1-11"},"PeriodicalIF":7.5,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43246-024-00670-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142443608","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}

引用次数: 0

Cancer sono-immunotherapy using a multi-metal-ligand framework 使用多金属配体框架的癌症超声免疫疗法

IF 7.5

Communications Materials Pub Date : 2024-10-14 DOI: 10.1038/s43246-024-00671-5

Jet-Sing M. Lee

引用次数: 0

The convergent design evolution of multiscale biomineralized structures in extinct and extant organisms 已灭绝生物和现存生物的多尺度生物矿化结构的趋同设计演化

IF 7.5

Communications Materials Pub Date : 2024-10-13 DOI: 10.1038/s43246-024-00669-z

Valentina Perricone, Ezra Sarmiento, Andrew Nguyen, Nigel C. Hughes, David Kisailus

{"title":"The convergent design evolution of multiscale biomineralized structures in extinct and extant organisms","authors":"Valentina Perricone, Ezra Sarmiento, Andrew Nguyen, Nigel C. Hughes, David Kisailus","doi":"10.1038/s43246-024-00669-z","DOIUrl":"10.1038/s43246-024-00669-z","url":null,"abstract":"Evolution has generated a sophisticated convergence of material components, ultrastructural designs, and fabrication processes in response to similar selective pressures across a diverse array of extinct and extant species. This review explores three key convergent design strategies: struts for lightweight structures with load-bearing efficiency, sutures for increased flexibility and stress management, and helicoids for impact resistance and fracture toughness. Through this examination, the review sheds light on how evolution can inspire innovative engineering approaches and technologies through the adoption of aspects of natural design. We foresee natural evolutive processes of construction as the informative harbingers of new, advanced, ecologically aware, and energy-efficient modes of human fabrication. The evolutionary process has created natural systems with structures that impart high mechanical performance, providing guidance for biomimetics. Here, the role played by three convergent design strategies – struts, sutures and helicoids – is discussed, spanning their occurrence in nature through to applications.","PeriodicalId":10589,"journal":{"name":"Communications Materials","volume":" ","pages":"1-18"},"PeriodicalIF":7.5,"publicationDate":"2024-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43246-024-00669-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142431091","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}

引用次数: 0

Microscopic probing of the superconducting and normal state properties of Ta2V3.1Si0.9 by muon spin rotation 通过μ介子自旋旋转微观探测Ta2V3.1Si0.9的超导和正常态特性

IF 7.5

Communications Materials Pub Date : 2024-10-12 DOI: 10.1038/s43246-024-00666-2

J. N. Graham, H. Liu, V. Sazgari, C. Mielke III, M. Medarde, H. Luetkens, R. Khasanov, Y. Shi, Z. Guguchia

{"title":"Microscopic probing of the superconducting and normal state properties of Ta2V3.1Si0.9 by muon spin rotation","authors":"J. N. Graham, H. Liu, V. Sazgari, C. Mielke III, M. Medarde, H. Luetkens, R. Khasanov, Y. Shi, Z. Guguchia","doi":"10.1038/s43246-024-00666-2","DOIUrl":"10.1038/s43246-024-00666-2","url":null,"abstract":"The two-dimensional kagome lattice is an experimental playground for novel physical phenomena, from frustrated magnetism and topological matter to chiral charge order and unconventional superconductivity. A newly identified kagome superconductor, Ta2V3.1Si0.9 has recently gained attention for possessing a record high critical temperature, TC = 7.5 K for kagome metals at ambient pressure. In this study we conducted a series of muon spin rotation measurements to delve deeper into understanding the superconducting and normal state properties of Ta2V3.1Si0.9. We demonstrate that Ta2V3.1Si0.9 is a bulk superconductor with either a s+s-wave or anisotropic s-wave gap symmetry, and has an unusual paramagnetic shift in response to external magnetic fields in the superconducting state. Additionally, we observe an exceptionally low superfluid density − a distinctive characteristic of unconventional superconductivity − which remarkably is comparable to the superfluid density found in hole-doped cuprates. In its normal state, Ta2V3.1Si0.9 exhibits a significant increase in the zero-field muon spin depolarisation rate, starting at approximately 150 K, which has been observed in other kagome-lattice superconductors, and therefore hints at possible hidden magnetism. These findings characterise Ta2V3.1Si0.9 as an unconventional superconductor and a noteworthy new member of the vanadium-based kagome material family. Ta2V3.1Si0.9 is an interesting kagome superconductor with a record-high critical temperature of 7.5 K for kagome metals at ambient pressure. Here, muon spin rotation measurements reveal an unusual paramagnetic shift in response to external magnetic fields and an exceptionally dilute superfluid density despite the high TC, signalling the unconventional nature of superconductivity.","PeriodicalId":10589,"journal":{"name":"Communications Materials","volume":" ","pages":"1-7"},"PeriodicalIF":7.5,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43246-024-00666-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142415384","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}

引用次数: 0

Multi-material 3D printing of functionally graded soft-hard interfaces for enhancing mandibular kinematics of temporomandibular joint replacement prostheses 功能分级软硬界面的多材料三维打印技术，用于增强颞下颌关节置换假体的下颌运动学性能

IF 7.5

Communications Materials Pub Date : 2024-10-12 DOI: 10.1038/s43246-024-00664-4

Vahid Moosabeiki, Afaq Khan, Mauricio Cruz Saldivar, Wim Van Paepegem, Brend P. Jonker, Eppo B. Wolvius, Jie Zhou, Nazli Tumer, Mohammad J. Mirzaali, Amir A. Zadpoor

{"title":"Multi-material 3D printing of functionally graded soft-hard interfaces for enhancing mandibular kinematics of temporomandibular joint replacement prostheses","authors":"Vahid Moosabeiki, Afaq Khan, Mauricio Cruz Saldivar, Wim Van Paepegem, Brend P. Jonker, Eppo B. Wolvius, Jie Zhou, Nazli Tumer, Mohammad J. Mirzaali, Amir A. Zadpoor","doi":"10.1038/s43246-024-00664-4","DOIUrl":"10.1038/s43246-024-00664-4","url":null,"abstract":"Temporomandibular joint (TMJ) replacement prostheses often face limitations in accommodating translational movements, leading to unnatural kinematics and loading conditions, which affect functionality and longevity. Here, we investigate the potential of functionally graded materials (FGMs) in TMJ prostheses to enhance mandibular kinematics and reduce joint reaction forces. We develop a functionally graded artificial cartilage for the TMJ implant and evaluate five FGM designs: hard, hard-soft, and three FGM gradients with gradual transitions from 90% hard material to 0%, 10%, and 20%. These designs are 3D printed, mechanically tested under quasi-static compression, and simulated under physiological conditions. Results from computational modeling and experiments are compared to an intact mandible during incisal clenching and left group biting. The FGM design with a transition from 90% to 0% hard material improves kinematics by 19%  and decreases perfomance by 3%, reduces joint reaction forces by 8% and 10%, and increases mandibular movement by 20% and 88% during incisal clenching and left group biting, respectively. These findings provide valuable insights for next-generation TMJ implants. Temporomandibular joint prostheses have limitations in their translational movements that affect functionality and longevity. Here, a 3D-printed functionally graded artificial cartilage attached to the temporomandibular joint implant improves the mandibular kinematics and movement range.","PeriodicalId":10589,"journal":{"name":"Communications Materials","volume":" ","pages":"1-11"},"PeriodicalIF":7.5,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43246-024-00664-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142415420","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}

引用次数: 0

Reducing inhomogeneous broadening of spin and optical transitions of nitrogen-vacancy centers in high-pressure, high-temperature diamond 减少高压高温金刚石中氮空位中心自旋和光学转变的非均相展宽

IF 7.5

Communications Materials Pub Date : 2024-10-11 DOI: 10.1038/s43246-024-00660-8

Rémi Blinder, Yuliya Mindarava, Thai Hien Tran, Ali Momenzadeh, Sen Yang, Petr Siyushev, Hitoshi Sumiya, Kenji Tamasaku, Taito Osaka, Norio Morishita, Haruki Takizawa, Shinobu Onoda, Hideyuki Hara, Fedor Jelezko, Jörg Wrachtrup, Junichi Isoya

{"title":"Reducing inhomogeneous broadening of spin and optical transitions of nitrogen-vacancy centers in high-pressure, high-temperature diamond","authors":"Rémi Blinder, Yuliya Mindarava, Thai Hien Tran, Ali Momenzadeh, Sen Yang, Petr Siyushev, Hitoshi Sumiya, Kenji Tamasaku, Taito Osaka, Norio Morishita, Haruki Takizawa, Shinobu Onoda, Hideyuki Hara, Fedor Jelezko, Jörg Wrachtrup, Junichi Isoya","doi":"10.1038/s43246-024-00660-8","DOIUrl":"10.1038/s43246-024-00660-8","url":null,"abstract":"With their optical addressability of individual spins and long coherence time, nitrogen-vacancy (NV) centers in diamond are often called “atom-like solid spin-defects”. As observed with trapped atomic ions, quantum interference mediated by indistinguishable photons was demonstrated between remote NV centers. In high sensitivity DC magnetometry at room temperature, NV ensembles are potentially rivaling with alkali-atom vapor cells. However, local strain induces center-to-center variation of both optical and spin transitions of NV centers. Therefore, advanced engineering of diamond growth toward crystalline perfection is demanded. Here, we report on the synthesis of high-quality HPHT (high-pressure, high-temperature) crystals, demonstrating a small inhomogeneous broadening of the spin transitions, of T2* = 1.28 μs, approaching the limit for crystals with natural 13C abundance, that we determine as T2* = 1.48 μs. The contribution from strain and local charges to the inhomogeneous broadening is lowered to ~17 kHz full width at half maximum for NV ensemble within a > 10 mm3 volume. Looking at optical transitions in low nitrogen crystals, we examine the variation of zero-phonon-line optical transition frequencies at low temperatures, showing a strain contribution below 2 GHz for a large fraction of single NV centers. Nitrogen-vacancy centers in diamond offer a promising platform for quantum applications but their optical and spin properties can be hampered by imperfections of the host crystal. Here, nitrogen-vacancy centers are created in high-pressure high-temperature diamond of high crystalline quality, demonstrating a small inhomogeneous broadening of the spin and optical transitions.","PeriodicalId":10589,"journal":{"name":"Communications Materials","volume":" ","pages":"1-10"},"PeriodicalIF":7.5,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43246-024-00660-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142415433","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}

引用次数: 0

Superconducting flux qubit with ferromagnetic Josephson π-junction operating at zero magnetic field 在零磁场下运行的带铁磁约瑟夫森 π 结的超导通量量子比特

IF 7.5

Communications Materials Pub Date : 2024-10-11 DOI: 10.1038/s43246-024-00659-1

Sunmi Kim, Leonid V. Abdurakhimov, Duong Pham, Wei Qiu, Hirotaka Terai, Sahel Ashhab, Shiro Saito, Taro Yamashita, Kouichi Semba

{"title":"Superconducting flux qubit with ferromagnetic Josephson π-junction operating at zero magnetic field","authors":"Sunmi Kim, Leonid V. Abdurakhimov, Duong Pham, Wei Qiu, Hirotaka Terai, Sahel Ashhab, Shiro Saito, Taro Yamashita, Kouichi Semba","doi":"10.1038/s43246-024-00659-1","DOIUrl":"10.1038/s43246-024-00659-1","url":null,"abstract":"Conventional superconducting flux qubits require the application of a precisely tuned magnetic field to set the operation point at half a flux quantum through the qubit loop, which complicates the on-chip integration of this type of device. It has been proposed that by inducing a π-phase shift in the superconducting order parameter using a precisely controlled nanoscale-thickness superconductor/ferromagnet/superconductor Josephson junction, commonly referred to as π-junction, it is possible to realize a flux qubit operating at zero magnetic flux. Here, we report the realization of a zero-flux-biased flux qubit based on three NbN/AlN/NbN Josephson junctions and a NbN/PdNi/NbN ferromagnetic π-junction. The qubit lifetime is in the microsecond range, which we argue is limited by quasiparticle excitations in the metallic ferromagnet layer. Our results pave the way for developing quantum coherent devices, including qubits and sensors, that utilize the interplay between ferromagnetism and superconductivity. Conventional superconducting flux qubits require a finely tuned magnetic field to operate, hindering their on-chip integration. Here, ferromagnetic Josephson junctions with a π-phase shift in the superconducting order parameter allow the realization of a flux qubit operating at zero magnetic field.","PeriodicalId":10589,"journal":{"name":"Communications Materials","volume":" ","pages":"1-7"},"PeriodicalIF":7.5,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43246-024-00659-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142415423","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}

引用次数: 0