Physica C-superconductivity and Its Applications最新文献_第10页

Weakly coupled type-II superconductivity in LaCoSi2 single crystal LaCoSi2单晶的弱耦合ii型超导性

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2025-01-21 DOI: 10.1016/j.physc.2025.1354655

F. Ito , N. Kabeya , N. Kimura

引用次数: 0

Normal state Landau–Fermi liquidness of pure and doped Sr2RuO4 superconductor 纯Sr2RuO4超导体和掺杂Sr2RuO4超导体的正常朗道-费米流动性

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2025-01-20 DOI: 10.1016/j.physc.2025.1354651

Luis Craco

{"title":"Normal state Landau–Fermi liquidness of pure and doped Sr2RuO4 superconductor","authors":"Luis Craco","doi":"10.1016/j.physc.2025.1354651","DOIUrl":"10.1016/j.physc.2025.1354651","url":null,"abstract":"<div><div>Based on local density approximation plus dynamical mean-field theory calculations we explore the normal state of pure and doped Sr<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>RuO<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span> superconductor, providing a multiparticle description of intrinsic Landau–Fermi liquidness. Self-energy corrections arising from multi-orbital electron–electron interactions lead to a strongly renormalized electronic state relevant to electron mass enhancement and the emergence of coherent Landau–Fermi liquid quasiparticles at low energies. We shed light on the electronic structure evolution of electron/hole doped Sr<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>RuO<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span> parent compound, showing the orbital-selective electronic state which emerges upon tuning the doping level of Sr<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>RuO<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span> in the vicinity of the van Hove singularities. This work forms an step forward for understanding the manifestation of anisotropic Coulomb interactions and how Landau–Fermi liquidness emerges in the normal state of Sr<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>RuO<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span> superconductor.</div></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"630 ","pages":"Article 1354651"},"PeriodicalIF":1.3,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143103659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Controllable preparation and superconducting properties of tantalum films with different orientations 不同取向钽薄膜的可控制备及其超导性能

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2025-01-20 DOI: 10.1016/j.physc.2025.1354652

Yun Fan , Yuchuan Liu , Yixin Liu , Wei Peng , Yu Wu , Gang Mu , Zhi-Rong Lin

{"title":"Controllable preparation and superconducting properties of tantalum films with different orientations","authors":"Yun Fan , Yuchuan Liu , Yixin Liu , Wei Peng , Yu Wu , Gang Mu , Zhi-Rong Lin","doi":"10.1016/j.physc.2025.1354652","DOIUrl":"10.1016/j.physc.2025.1354652","url":null,"abstract":"<div><div>Transmon qubits based on <span><math><mi>α</mi></math></span>-Ta films have been demonstrated to possess long lifetimes, sparking significant interests among researchers in this material. In this study, we systematically investigated the growth conditions of <span><math><mi>α</mi></math></span>-Ta films on sapphire substrates. By controlling the growth temperature and power, we successfully prepared films with two distinct crystal orientations: <span><math><mi>α</mi></math></span>-Ta [110] and <span><math><mi>α</mi></math></span>-Ta [111]. We found that the growth conditions with low power and low temperature, as well as that with high power and high temperature, are conducive to the growth of <span><math><mi>α</mi></math></span>-Ta [110], while the low power combined with high temperature favors the growth of <span><math><mi>α</mi></math></span>-Ta [111]. The critical transition temperature <span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span> of the [111]-oriented film increases more gently with the increase of residual resistance ratio (RRR) compared to the [110]-oriented film. Additionally, our result indicates that as the thickness of the <span><math><mi>α</mi></math></span>-Ta [111] film increases, the values of both <span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span> and RRR rise, with the highest RRR value of 24.6. Our results provide important references for the preparation of high-quality <span><math><mi>α</mi></math></span>-Ta thin films.</div></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"630 ","pages":"Article 1354652"},"PeriodicalIF":1.3,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143103657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Influence of fluctuant external magnetic field on the lateral unrecoverable distance of HTS bulks 外磁场波动对高温超导体侧向不可恢复距离的影响

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2025-01-16 DOI: 10.1016/j.physc.2025.1354656

Ye Hong, Zhichuan Huang, Jun Zheng, Jiwang Zhang, Zigang Deng

{"title":"Influence of fluctuant external magnetic field on the lateral unrecoverable distance of HTS bulks","authors":"Ye Hong, Zhichuan Huang, Jun Zheng, Jiwang Zhang, Zigang Deng","doi":"10.1016/j.physc.2025.1354656","DOIUrl":"10.1016/j.physc.2025.1354656","url":null,"abstract":"<div><div>High temperature superconducting (HTS) maglev has great potential for high-speed rail transportation due to its non-contact nature, simple structure, and environmental benefits. The lateral stability of the HTS bulk superconductor is crucial for the curve negotiation ability of maglev trains running at high speeds. The HTS bulk can provide guidance for the maglev train without active control due to its unique magnetic flux pinning property. However, when passing through curves, it can deviate from its original position due to centrifugal effects and may not fully return to its original position. This deviation, known as the unrecoverable distance (UD), is closely related to the guidance performance of the maglev system. In this paper, the lateral UD of the HTS bulk is analyzed through lateral round-trip guidance force experiments using a customized HTS maglev dynamic measurement platform (SCML-03) with a circular permanent magnet guideway (PMG). The guidance force under different rotational speeds of the PMG was tested to study the effect of the fluctuation frequency of the external magnetic field. The influence of maximum lateral displacement (MLD), field cooling height (FCH), and working height (WH) on the UD of the HTS bulk are also discussed. The results showed that the rotational speed of the PMG has little effect on the dynamic guidance performance. The UD can be reduced by lowering the FCH and raising the WH appropriately. Additionally, methods should be found to restrain the possible MLD of levitated vehicles. This experimental analysis shows the lateral recoverable performance of the HTS bulk and provides a reference for the future design of the HTS maglev train.</div></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"630 ","pages":"Article 1354656"},"PeriodicalIF":1.3,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143103658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Microstructure and superconducting property research of Cu-Mg reinforcing graphene and grain refining MgB2 by carbon-contained substances doping 含碳物质掺杂Cu-Mg增强石墨烯和晶粒细化MgB2的微观结构和超导性能研究

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2025-01-15 DOI: 10.1016/j.physc.2024.1354632

Wenbin Jin , Nan Liu , Fang Cheng , Zongqing Ma , Yongchang Liu , Pingzhan Si , Hongliang Ge

引用次数: 0

Development of a 3 T cryogenic probe station with a 5.5 T superconducting magnet 5.5 T超导磁体3t低温探测站的研制

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2025-01-15 DOI: 10.1016/j.physc.2024.1354631

Donghu Wang , Zhan Zhang , Zuoguang Li , Peng Gao , Pengfei Bai , Rongtian Zhu , Lian Zhang , Guangdong Li , Ze Wu , Chao Zhou

引用次数: 0

Characterization of damage in REBCO tapes for joint-less 2G-HTS magnets during mechanical slitting 无关节2G-HTS磁体在机械分切过程中REBCO带损伤的表征

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2025-01-15 DOI: 10.1016/j.physc.2024.1354629

Hao Dong , Daxing Huang , Hao Yu , Hongwei Gu , Fazhu Ding

引用次数: 0

Motion and thermal stability for high-temperature superconducting maglev vehicle under extreme crosswind conditions 极端侧风条件下高温超导磁悬浮车辆的运动和热稳定性

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2025-01-15 DOI: 10.1016/j.physc.2024.1354620

Le Xu , Jun Zheng , Yonghai Zhao , Peng Pang , Li Wang , Jukun Wang

{"title":"Motion and thermal stability for high-temperature superconducting maglev vehicle under extreme crosswind conditions","authors":"Le Xu , Jun Zheng , Yonghai Zhao , Peng Pang , Li Wang , Jukun Wang","doi":"10.1016/j.physc.2024.1354620","DOIUrl":"10.1016/j.physc.2024.1354620","url":null,"abstract":"<div><div>High-temperature superconductor (HTS) pinning magnetic levitation (maglev) systems show significant potential for high-speed rail transportation applications, attributed to their passive and stable levitation arising from the coupling between HTS bulks and the permanent magnetic guideway (PMG). However, there is a lack of research on the operational safety of HTS maglev trains under extreme crosswind conditions as one significant safety issue of the HTS maglev transport tool. Therefore, this paper employs an experimentally validated two-dimensional electromagnetic-thermal-mechanical model to study the temperature rise variations in HTS bulks under different extreme wind scales, The maximum temperature rise inside the bulk submerged in liquid nitrogen remains below 1 K. It also preliminarily explores the wind scales that cause motion instability in HTS maglev trains. The results indicate that extreme crosswind conditions have minimal effect on the temperature rise of HTS bulks. However, under wind scale 12 conditions, HTS maglev trains face a risk of derailment. These findings offer valuable thermal-motion stability insight for informing the future design and practical implementation of HTS pinning maglev systems.</div></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"628 ","pages":"Article 1354620"},"PeriodicalIF":1.3,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Calculation and understanding of the nitrogen doping process in niobium for superconducting radio frequency accelerator 超导射频加速器用铌中氮掺杂过程的计算与认识

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2025-01-15 DOI: 10.1016/j.physc.2024.1354616

Yang Ye , Ziqin Yang , Shuai Wu , Jianpeng Li , Tao Liu , Guangze Jiang , Hangxu Li , Zepeng Jiang , Jiaqi Liu , Yuan He , Wenlong Zhan

{"title":"Calculation and understanding of the nitrogen doping process in niobium for superconducting radio frequency accelerator","authors":"Yang Ye , Ziqin Yang , Shuai Wu , Jianpeng Li , Tao Liu , Guangze Jiang , Hangxu Li , Zepeng Jiang , Jiaqi Liu , Yuan He , Wenlong Zhan","doi":"10.1016/j.physc.2024.1354616","DOIUrl":"10.1016/j.physc.2024.1354616","url":null,"abstract":"<div><div>A computational model is developed to predict the nitrogen concentration profile within Nb utilized in superconducting radio-frequency (SRF) accelerators. This model incorporates variations in the sticking coefficient of nitrogen during the adsorption process on the Nb surface, along with the impact of nitride formation resulting from the reaction between Nb and nitrogen. The conclusions drawn from this model are compared with the outcomes of vertical test experiments. The computed results indicate that exhibiting a significant nitrogen doping effect is achieved when the nitrogen concentration is approximately 1E25 atom/m<span><math><msup><mrow></mrow><mrow><mn>3</mn></mrow></msup></math></span> under various nitrogen doping recipes. This study enhances the understanding of the nitrogen doping process and enables the rapid determination of the optimal subsequent material removal thickness for various experimental recipes.</div></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"628 ","pages":"Article 1354616"},"PeriodicalIF":1.3,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Development of a 1 kW-class fully high-temperature superconducting induction/synchronous machine that enables non-superconducting operation 研制1千瓦级全高温超导感应/同步电机，实现非超导操作

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2025-01-15 DOI: 10.1016/j.physc.2024.1354634

Yunfei Gao , Taketsune Nakamura , Miyuki Nakamura , Takanobu Kiss

{"title":"Development of a 1 kW-class fully high-temperature superconducting induction/synchronous machine that enables non-superconducting operation","authors":"Yunfei Gao , Taketsune Nakamura , Miyuki Nakamura , Takanobu Kiss","doi":"10.1016/j.physc.2024.1354634","DOIUrl":"10.1016/j.physc.2024.1354634","url":null,"abstract":"<div><div>Fully high-temperature superconducting (HTS) rotating machines, with all windings made of high-temperature superconducting materials, have garnered significant interest due to their potential for achieving extremely high efficiency and power density. However, temperature increases caused by accidents can lead to sudden release of high-density current, risking burnout of the machine. This study presents the design, fabrication, and testing of a 1 kW-class fully HTS induction/synchronous machine (HTS-ISM) capable of operating in both superconducting and non-superconducting states. The rotor features a BSCCO/normal conductor hybrid squirrel-cage winding, while the stator uses a face-to-face double-stacked (FFDS) REBCO conductor for its three-phase winding. The 12 stator FFDS coils, with a minimum bending diameter of 17 mm, achieved a average critical current of 132 A when immersed in liquid nitrogen (77 K) and demonstrated a current-carrying capacity of at least 10 A at room temperature. Rotation tests were successfully conducted at temperatures 77 K and above 120 K, confirming superconducting and normal conducting operations. These results demonstrate the feasibility of a fully HTS-ISM capable of reduced-power operation even during cooling system failure, which is crucial for applications in electric aircraft.</div></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"628 ","pages":"Article 1354634"},"PeriodicalIF":1.3,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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