Physica C-superconductivity and Its Applications最新文献

{"title":"Numerical simulation and design of superconducting cusp magnet for 400 mm Magnetic-field-applied Czochralski (MCZ) single crystal silicon growth","authors":"Bin Zhao ,&nbsp;Jinxing Zheng ,&nbsp;Ming Li ,&nbsp;Tao Ma","doi":"10.1016/j.physc.2025.1354721","DOIUrl":"10.1016/j.physc.2025.1354721","url":null,"abstract":"<div><div>Single crystal silicon is currently used for the production of chips and solar cells, commonly prepared using the Magnetic-field-applied Czochralski (MCZ) method. However, during the crystal growth process, the uneven heating distribution induces a strong thermal convection effect in the melt, which facilitates the doping of the crystal with oxygen impurities and affects the quality of the produced crystals. With the implementation of the cusp magnetic field method, the melt convection can be effectively suppressed. Two symmetrically placed superconducting coils generate a cusp magnetic field by passing currents in opposite directions. In this work, we selected a 42-inch crucible to prepare a single crystal silicon with a diameter of 400 mm. We systematically investigated the convective inhibition effect of the magnetic field by comparing the flow and temperature fields of the melt with and without the applied cusp magnetic field. To achieve a radial magnetic flux density (B_r) greater than 1000 G at the crucible wall, the parameters of the two superconducting coils were optimized. Based on the optimization results, we fabricated a YBCO high temperature superconducting (HTS) magnet with a coil inner radius of 900 mm and a coil spacing of 350 mm. The cooling structure and the tests were presented, which required 22 days to lower the coil’s temperature to 10.6 K. Finally, B_r at the crucible wall was measured, yielding a good consistency with the simulated values.</div></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"634 ","pages":"Article 1354721"},"PeriodicalIF":1.3,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144194765","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}

{"title":"The compound Ca2RuO4 within the Zaanen–Sawatzky–Allen approach","authors":"Alfonso Romano ,&nbsp;Giuseppe Cuono ,&nbsp;Jan Skolimowski ,&nbsp;Carmine Autieri ,&nbsp;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":"2025-07-15","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}

{"title":"Research on the HTS joint for 10kA-level CORC cable with forced-flow cooling","authors":"Yuan Cheng ,&nbsp;Jinxing Zheng ,&nbsp;Ming Li ,&nbsp;Shaotao Dai ,&nbsp;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":"2025-07-15","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}

{"title":"Emergent Bose liquid: A generic quantum state of matter alternative to Fermi liquid","authors":"Zi-Jian Lang ,&nbsp;Anthony Hegg ,&nbsp;Yucel Yildirim ,&nbsp;Shengtao Jiang ,&nbsp;Long Zou ,&nbsp;Xinlei Yue ,&nbsp;Tao Zeng ,&nbsp;Jinning Hou ,&nbsp;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":"2025-07-15","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}

{"title":"Pressure dependence of the superconducting properties of the rare-earth-based Heusler compounds ReRh2Sn (Re=Sc, Y and Lu)","authors":"A. Azouaoui ,&nbsp;S. Mouchou ,&nbsp;Y. Toual ,&nbsp;A. Rezzouk ,&nbsp;K. Bouslykhane ,&nbsp;N. Benzakour ,&nbsp;A. Hourmatallah","doi":"10.1016/j.physc.2025.1354736","DOIUrl":"10.1016/j.physc.2025.1354736","url":null,"abstract":"<div><div>This study employed density functional theory (DFT) within the generalized gradient approximation (GGA) to investigate the structural, electronic, vibrational and superconductivity properties of full-Heusler compounds ReRh₂Sn (Re=Sc, Y and Lu) under pressure ranging from 0 to 10 GPa. The analysis of the results reveals that the studied compounds exhibit metallic behavior with robust dynamic stability under pressures up to 10 GPa. The superconducting properties were evaluated using the isotropic Eliashberg function, and the obtained values of the superconducting critical temperature T<span><math><msub><mrow></mrow><mrow><mtext>C</mtext></mrow></msub></math></span> and electron–phonon coupling constant <span><math><msub><mrow><mi>λ</mi></mrow><mrow><mi>e</mi><mi>p</mi></mrow></msub></math></span> indicate that ReRh₂Sn compounds are weak to moderate coupled superconductors. Among the studied compounds, YRh₂Sn exhibits the highest superconducting critical temperature T<span><math><msub><mrow></mrow><mrow><mtext>C</mtext></mrow></msub></math></span>. As the pressure increases from 0 to 10 GPa, the electron–phonon coupling constant (<span><math><msub><mrow><mi>λ</mi></mrow><mrow><mi>e</mi><mi>p</mi></mrow></msub></math></span>) decreases. This reduction, along with a decrease in the density of states at the Fermi level, leads to a decline in the superconducting critical temperature. Additionally, we report the thermodynamic parameters such as the superconducting gap <span><math><mi>Δ</mi></math></span>, the Sommerfeld constant (<span><math><mi>γ</mi></math></span>), the specific heat jump at T<span><math><msub><mrow></mrow><mrow><mtext>C</mtext></mrow></msub></math></span> and the Ginzburg–Landau parameter(<span><math><msub><mrow><mi>κ</mi></mrow><mrow><mi>G</mi><mi>L</mi></mrow></msub></math></span>). The results demonstrate that these parameters decrease with increasing pressure for ScRh₂Sn and YRh₂Sn. However, between 0 to 5 GPa, the parameters decrease, while they decrease between 5 GPa to 10 GPa.</div></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"634 ","pages":"Article 1354736"},"PeriodicalIF":1.3,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107687","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}

{"title":"Corrigendum to “The foot, the fan, and the cuprate phase diagram: Fermi-volume-changing quantum phase transitions” [Physica C (205) 633, 1354707 (2025)]","authors":"Subir Sachdev","doi":"10.1016/j.physc.2025.1354732","DOIUrl":"10.1016/j.physc.2025.1354732","url":null,"abstract":"","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"634 ","pages":"Article 1354732"},"PeriodicalIF":1.3,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144194700","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}

{"title":"Planckian dissipation and c-axis superfluid density in cuprate superconductors","authors":"Sudip Chakravarty","doi":"10.1016/j.physc.2025.1354735","DOIUrl":"10.1016/j.physc.2025.1354735","url":null,"abstract":"<div><div>An interesting concept in condensed matter physics is Planckian dissipation, in particular its manifestation in a remarkable phenomenology of superfluid density as a function of superconducting transition temperatures of cuprate high-temperature superconductors. The concept was introduced for <span><math><mrow><mi>a</mi><mi>b</mi></mrow></math></span>-plane properties. However, here I show that when suitably interpreted, it is also applicable to the <span><math><mi>c</mi></math></span>-axis resistivity, which has not been adequately addressed previously. There are two results in this note: the first is a derivation using Kubo formula as to how Planckian dissipation could arise. It is aided by the fact that the <span><math><mi>c</mi></math></span>-axis tunneling matrix element is small enough such that a second order perturbation theory combined with presumed non-Fermi liquid behavior is sufficient to illuminate the phenomenon. In addition, the notion of quantum criticality plays an important role.</div></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"634 ","pages":"Article 1354735"},"PeriodicalIF":1.3,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144099107","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}

{"title":"Novel CSC-SMES based modular unified power quality controller","authors":"Wenyong Guo ,&nbsp;Yun Hong ,&nbsp;Zhenning He ,&nbsp;Jianyu Lan ,&nbsp;Yahong Yang ,&nbsp;Wenju Sang ,&nbsp;Zhian Jia ,&nbsp;Renqiang Zhao","doi":"10.1016/j.physc.2025.1354745","DOIUrl":"10.1016/j.physc.2025.1354745","url":null,"abstract":"<div><div>This paper introduces a novel modular unified power quality controller (UPQC) topology based on superconducting magnetic energy storage (SMES) with coupled superconducting coil (CSC). Using coupled superconducting coils made of both <span><math><msub><mrow><mi>MgB</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span> and YBCO types, the proposed UPQC maximizes the utilization rate of the superconductor to store magnetic energy for power quality enhancement. The novel topology addresses key power quality issues, such as voltage fluctuations, dynamic voltage sags, and harmonic distortions, by integrating advanced topology and control strategies. The simulation results show that the suppression ratios of voltage, current harmonic, and three phase current imbalance with the proposed UQPC are 68%, 73% and 98. 7%, respectively, offering significant advances to improve grid power quality.</div></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"634 ","pages":"Article 1354745"},"PeriodicalIF":1.3,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144194699","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}

{"title":"Enhanced superconductivity in non-centrosymmetric hexagonal HfRuAs","authors":"Lijia Zhou ,&nbsp;Xin Chen ,&nbsp;Guangtong Shan ,&nbsp;Qiang Li ,&nbsp;Xiaojun Kuang ,&nbsp;Xianran Xing","doi":"10.1016/j.physc.2025.1354710","DOIUrl":"10.1016/j.physc.2025.1354710","url":null,"abstract":"<div><div>We report the synthesis, crystal structure, superconductivity, and physical properties of HfRuAs, a ternary equiatomic compound that can crystallize in either the TiFeSi-type orthorhombic (o’-phase) or the Fe₂P-type hexagonal (h-phase) structure. Our synthesized polycrystalline samples exhibit coexistence of both two phases due to synthesis conditions. The h-phase demonstrates bulk type-II weak-coupling superconductivity with a superconducting transition temperature of approximately 7.25 K, and an upper critical field of 12.40 T. Structural refinements suggest that the expansion of Ru-Ru distances within triangular clusters may be associated with the enhancement of superconductivity in the h-phase. First-principles calculations confirm that antisymmetric spin-orbit coupling (ASOC) induces significant band splitting and opens a fully gapped superconducting state. These results indicate that h-phase HfRuAs is a promising candidate for exploring superconductivity in weakly correlated, non-centrosymmetric superconductors.</div></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"633 ","pages":"Article 1354710"},"PeriodicalIF":1.3,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143791021","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}

{"title":"Concealed Mott criticality: Unifying the Kondo breakdown and doped charge-transfer insulators","authors":"Louk Rademaker","doi":"10.1016/j.physc.2025.1354720","DOIUrl":"10.1016/j.physc.2025.1354720","url":null,"abstract":"<div><div>I show that the quantum critical points observed in heavy fermions (the ‘Kondo breakdown’) and in doped cuprates can be understood in terms of concealed Mott criticality. In this picture, one species of electrons undergoes a Mott localization transition, in the presence of metallic charge carries. As is shown in a simple toy model, this results in a Fermi surface jump at the transition, as well as mass enhancement on both the ‘large’ and ‘small’ Fermi surface side of the transition, consistent with the experimental observations.</div></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"633 ","pages":"Article 1354720"},"PeriodicalIF":1.3,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887603","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}