Physica C-superconductivity and Its Applications最新文献_第4页

Superconducting single crystals show about 50% increase of the superconducting critical temperature after Ar Ion implantation 氩离子注入后，超导单晶的超导临界温度提高了约50%

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2025-05-08 DOI: 10.1016/j.physc.2025.1354733

Kriti Ranjan Sahu , Thomas Wolf , A K Mishra , Keka R Chakraborty , A Banerjee , V Ganesan , Udayan De

{"title":"Superconducting single crystals show about 50% increase of the superconducting critical temperature after Ar Ion implantation","authors":"Kriti Ranjan Sahu , Thomas Wolf , A K Mishra , Keka R Chakraborty , A Banerjee , V Ganesan , Udayan De","doi":"10.1016/j.physc.2025.1354733","DOIUrl":"10.1016/j.physc.2025.1354733","url":null,"abstract":"<div><div>Single crystals of a Fe-based superconductor, Ba(Fe<sub>0.943</sub>Co<sub>0.057</sub>)<sub>2</sub>As<sub>2</sub>, with ∼200 μm thickness (t) have been irradiated along the thickness (c-axis) of by 1.5 MeV Ar<sup>6+</sup> ions, having ion range (R) of 0.903 μm (SRIM calculation). Fast ion irradiations damage the lattice of the target, and usually decrease the superconducting critical temperature (T<sub>c</sub>), with a few exceptions of small increases. However, our irradiation, a case of ion implantation (R > t), presently to a fluence of 2.5 × 10<sup>15</sup> Ar<sup>6+</sup>/cm<sup>2</sup>, increased the onset T<sub>c</sub> of the single crystal superconductors by ∼ 8 K from its initial value of ∼ 17 K as measured from the real part of the magnetic susceptibility, matching results from our additional measurements of the imaginary part, electrical resistivity and magnetization. These self-supporting T<sub>c</sub> results ensure correctness of the result. To our knowledge, such huge increase of the superconducting critical temperature by ion irradiation has not been reported earlier. Fortunately, we find following explanation, and consider it most appropriate. The insoluble inert gas atoms precipitate often as high-pressure miniature bubbles as is well known from various experiments and also from observations in nuclear reactor walls. This exerts a large compressive strain on the lattice. Our novel explanation is that this additional strain increases T<sub>c</sub> by ∼ 49 %. Moreover, the same Ar implantation in non-superconducting BaFe<sub>2</sub>As<sub>2</sub> induced 20 K superconductivity. Depending on such bubble formation and their stability in other target-ion pairs, such large T<sub>c</sub> enhancement may be discovered in other superconductors, and used with the advantages of higher T<sub>c</sub>.</div></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"635 ","pages":"Article 1354733"},"PeriodicalIF":1.3,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144170427","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

The compound Ca2RuO4 within the Zaanen–Sawatzky–Allen approach Zaanen-Sawatzky-Allen方法中的化合物Ca2RuO4

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2025-05-07 DOI: 10.1016/j.physc.2025.1354725

Alfonso Romano , Giuseppe Cuono , Jan Skolimowski , Carmine Autieri , Canio Noce

{"title":"The compound Ca2RuO4 within the Zaanen–Sawatzky–Allen approach","authors":"Alfonso Romano , Giuseppe Cuono , Jan Skolimowski , Carmine Autieri , Canio Noce","doi":"10.1016/j.physc.2025.1354725","DOIUrl":"10.1016/j.physc.2025.1354725","url":null,"abstract":"<div><div>Recent advancements in the application of the Zaanen–Sawatzky–Allen (ZSA) theory have significantly expanded its scope in a wide range of materials beyond standard <span><math><mrow><mn>3</mn><mi>d</mi></mrow></math></span> transition metal compounds, from high-temperature superconductors to topological insulators and low-dimensional systems. The combination of computational tools, such as dynamical mean field theory, along with experimental insights, allowed to further refine the theory, making it a valuable framework for classifying and predicting the electronic properties of large classes of complex materials with correlated electrons. Here, we extend the application of the ZSA approach to Ca<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>, a widely studied system where, differently from what happens in the transition metal compounds usually analyzed in this context, the relevant excitations close to the Fermi energy involve electrons coming from partially filled <span><math><mrow><mn>4</mn><mi>d</mi></mrow></math></span> shells, those of ruthenium atoms, rather than <span><math><mrow><mn>3</mn><mi>d</mi></mrow></math></span> ones.</div></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"634 ","pages":"Article 1354725"},"PeriodicalIF":1.3,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143912273","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

Does the Meissner effect require radial charge flow? 迈斯纳效应需要径向电荷流吗？

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2025-05-05 DOI: 10.1016/j.physc.2025.1354724

J.E. Hirsch

引用次数: 0

Research on the HTS joint for 10kA-level CORC cable with forced-flow cooling 10ka级强流冷却CORC电缆HTS接头的研究

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2025-05-01 DOI: 10.1016/j.physc.2025.1354731

Yuan Cheng , Jinxing Zheng , Ming Li , Shaotao Dai , Tao Ma

{"title":"Research on the HTS joint for 10kA-level CORC cable with forced-flow cooling","authors":"Yuan Cheng , Jinxing Zheng , Ming Li , Shaotao Dai , Tao Ma","doi":"10.1016/j.physc.2025.1354731","DOIUrl":"10.1016/j.physc.2025.1354731","url":null,"abstract":"<div><div>Due to the high critical current and excellent flexibility in winding, Conductor on Round Core (CORC) cable had become one of the most ideal basic units for constructing high-temperature superconducting (HTS) coils. Under conditions of rapid current and magnetic field variations, the cables experience hysteresis losses in ReBCO tapes and eddy current losses in the copper tubes. Forced-flow cooling method could remove heat in time, thereby maintaining the temperature of the tapes. So for large-scale scientific devices such as magnet system of the accelerators, forced-flow inside the tubes has become the most efficient cooling method. However, in the manufacture of HTS magnets, it is common practice to solder the ends of the cables to copper blocks to prepare joints. This method is only suitable for immersion or conduction cooling. Therefore, the development of an HTS joint capable of meeting the forced-flow cooling requirements of the CORC cable becomes essential. This article proposes a novel HTS joint design, which can realize double-channel forced flow cooling for CORC cable. The ReBCO tapes can be directly in contact with liquid helium. The joint resistance at 4.5 K is 25.3 nΩ. Through thermal-hydraulic analysis, with the implementation of the joint designed in this article, at 3.5 T, the minimum quench energy (MQE) of double-channel forced-flow cooling cable is 220.12 J for long disturbance, significantly higher than that of single-channel forced-flow cooling cable. These results demonstrate that the joint developed in this article markedly improves the operational stability of the CORC cable.</div></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"634 ","pages":"Article 1354731"},"PeriodicalIF":1.3,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916158","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 growth parameters on the superconducting transition temperature in granular aluminum films 生长参数对颗粒状铝膜超导转变温度的影响

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2025-04-28 DOI: 10.1016/j.physc.2025.1354709

Aniruddha Deshpande, Jan Pusskeiler, Christian Prange, Uwe Rogge, Martin Dressel, Marc Scheffler

引用次数: 0

Stripe-like correlations in the cuprates from oxygen NMR 来自氧核磁共振的铜酸盐的条纹状相关性

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2025-04-27 DOI: 10.1016/j.physc.2025.1354722

Daniel Bandur , Abigail Lee , Stefan Tsankov , Andreas Erb , Jürgen Haase

{"title":"Stripe-like correlations in the cuprates from oxygen NMR","authors":"Daniel Bandur , Abigail Lee , Stefan Tsankov , Andreas Erb , Jürgen Haase","doi":"10.1016/j.physc.2025.1354722","DOIUrl":"10.1016/j.physc.2025.1354722","url":null,"abstract":"<div><div>Nuclear magnetic resonance (NMR) of planar oxygen, with its family independent phenomenology, is ideally suited to probe the nature of the quantum matter of superconducting cuprates. Here, with new experiments on La<span><math><msub><mrow></mrow><mrow><mn>2</mn><mo>−</mo><mi>x</mi></mrow></msub></math></span>Sr<span><math><msub><mrow></mrow><mrow><mi>x</mi></mrow></msub></math></span>CuO<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span>, in particular also at high doping levels, we report on short-range stripe-like correlations between local charge and spin. The amplitudes of the spin and charge variations at room temperature are nearly independent of doping up to at least <span><math><mrow><mi>x</mi><mo>=</mo><mn>0</mn><mo>.</mo><mn>30</mn></mrow></math></span>. However, the correlation is inverted upon passing <span><math><mrow><mi>x</mi><mo>=</mo><mn>1</mn><mo>/</mo><mn>4</mn></mrow></math></span>. Despite the atomic scale length, the variations still resemble the average spin and charge relation. Literature data show the correlations to be generic to the cuprates.</div></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"633 ","pages":"Article 1354722"},"PeriodicalIF":1.3,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143900335","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

Concealed Mott criticality: Unifying the Kondo breakdown and doped charge-transfer insulators 隐藏莫特临界：统一近藤击穿和掺杂电荷转移绝缘体

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2025-04-26 DOI: 10.1016/j.physc.2025.1354720

Louk Rademaker

引用次数: 0

Emergent Bose liquid: A generic quantum state of matter alternative to Fermi liquid 涌现玻色液体：替代费米液体的物质的一般量子态

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2025-04-26 DOI: 10.1016/j.physc.2025.1354723

Zi-Jian Lang , Anthony Hegg , Yucel Yildirim , Shengtao Jiang , Long Zou , Xinlei Yue , Tao Zeng , Jinning Hou , Wei Ku

{"title":"Emergent Bose liquid: A generic quantum state of matter alternative to Fermi liquid","authors":"Zi-Jian Lang , Anthony Hegg , Yucel Yildirim , Shengtao Jiang , Long Zou , Xinlei Yue , Tao Zeng , Jinning Hou , Wei Ku","doi":"10.1016/j.physc.2025.1354723","DOIUrl":"10.1016/j.physc.2025.1354723","url":null,"abstract":"<div><div>With continuous success in understanding and predicting experimental results in various materials, Fermi liquid theory has undoubtedly been demonstrated to be the cornerstone of modern condensed matter physics. However, the applicability of this theory was challenged by the observation non-Fermi-liquid behaviors in strongly correlated materials. Here, we introduce a different quantum state of matter, namely an emergent Bose liquid formed from tightly bound pairs of neighboring fermions. Many features of this emergent Bose liquid, including transport properties, superconducting phase and critical points, Bose metal phase, non-Fermi-liquid scattering rate, pseudogap, and superconducting gap, all demonstrate qualitatively different behavior from Fermi liquid. Surprisingly, from room temperature down to the low-temperature limit and from the low-density to the high-density regime, we find good semi-quantitative agreement with (and simple explanations for) many observations without introducing free parameters beyond the initial tight-binding coefficients. Producing such a broad agreement with experiments from a single emergent Bose liquid model strongly supports this alternative quantum state of matter for understanding the physics of strongly correlated materials.</div></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"634 ","pages":"Article 1354723"},"PeriodicalIF":1.3,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916159","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

Mixed-symmetry superconductivity and the energy gap 混合对称超导和能隙

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2025-04-25 DOI: 10.1016/j.physc.2025.1354719

P. Senarath Yapa , X. Guo , J. Maciejko , F. Marsiglio

{"title":"Mixed-symmetry superconductivity and the energy gap","authors":"P. Senarath Yapa , X. Guo , J. Maciejko , F. Marsiglio","doi":"10.1016/j.physc.2025.1354719","DOIUrl":"10.1016/j.physc.2025.1354719","url":null,"abstract":"<div><div>The symmetry of the superconducting order parameter, or simply the “gap”, provides certain constraints on the actual mechanism that gives rise to pairing and ultimately to superconductivity. In this work we show how superconducting phases with mixed singlet-triplet symmetries can arise below <span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span> for a generic tight-binding model. We first examine the 1D case to better illustrate the prevalence of symmetry-breaking transitions below <span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span>, and then the more realistic 2D case. In both cases we illustrate the implication for spectroscopic investigations of the energy gap by calculating the density of states for different temperatures below <span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span>. We find that the structure of the density of states near <span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span> can vary dramatically from its form near <span><math><mrow><mi>T</mi><mo>=</mo><mn>0</mn></mrow></math></span>. A complete picture of the superconducting symmetry can only be attained if measurements are made over the entire temperature range.</div></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"633 ","pages":"Article 1354719"},"PeriodicalIF":1.3,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904196","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

Elastoplastic contact behavior of multi-stage superconducting cables under tension 多级超导电缆在张力作用下的弹塑性接触行为

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2025-04-19 DOI: 10.1016/j.physc.2025.1354727

Zhiwen Zhou, Sitongyan Li, Zhiwen Gao

{"title":"Elastoplastic contact behavior of multi-stage superconducting cables under tension","authors":"Zhiwen Zhou, Sitongyan Li, Zhiwen Gao","doi":"10.1016/j.physc.2025.1354727","DOIUrl":"10.1016/j.physc.2025.1354727","url":null,"abstract":"<div><div>The superconductor cable with multi-stage twisted strands is a key component in the International Thermonuclear Experimental Reactor. These superconducting strands are composite materials with a complex microstructure. In the study, an elastoplastic constitutive model incorporating both isotropic and kinematic hardening is established to investigate the mechanical properties of the strands. The model is implemented as a user-defined material subroutine (UMAT) in the commercial finite element code ABAQUS using the fully implicit backward Euler method. Based on the analysis of the elastoplastic properties of the strands, a numerical contact model is developed to predict the contact characteristics of the multi-stage superconducting cable. The influence of helical pitch on the contact characteristics is examined by integrating the elastoplastic constitutive relations of the strands with their hierarchical helical structures. Numerical results demonstrate that the proposed model accurately describes the contact characteristics of the multi-stage superconducting cable. It is noteworthy that the elastoplastic contact force is found to be smaller than the elastic contact force. This elastoplastic contact model can be effectively used to predict the degradation of critical current in the multi-stage superconducting cable due to tensile loads.</div></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"633 ","pages":"Article 1354727"},"PeriodicalIF":1.3,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859871","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