Pub Date : 2025-06-02DOI: 10.1016/j.physc.2025.1354721
Bin Zhao , Jinxing Zheng , Ming Li , Tao Ma
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 (Br) 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, Br at the crucible wall was measured, yielding a good consistency with the simulated values.
{"title":"Numerical simulation and design of superconducting cusp magnet for 400 mm Magnetic-field-applied Czochralski (MCZ) single crystal silicon growth","authors":"Bin Zhao , Jinxing Zheng , Ming Li , 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<sub>r</sub>) 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<sub>r</sub> 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":"2025-06-02","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}
Pub Date : 2025-06-02DOI: 10.1016/j.physc.2025.1354754
Dirk van der Marel
{"title":"Corrigendum to “Thoughts about boosting superconductivity” [Physica C: Superconductivity and its Applications 632 (2025) 1354688]","authors":"Dirk van der Marel","doi":"10.1016/j.physc.2025.1354754","DOIUrl":"10.1016/j.physc.2025.1354754","url":null,"abstract":"","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"635 ","pages":"Article 1354754"},"PeriodicalIF":1.3,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144587477","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}
Pub Date : 2025-06-02DOI: 10.1016/j.physc.2025.1354745
Wenyong Guo , Yun Hong , Zhenning He , Jianyu Lan , Yahong Yang , Wenju Sang , Zhian Jia , Renqiang Zhao
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 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.
{"title":"Novel CSC-SMES based modular unified power quality controller","authors":"Wenyong Guo , Yun Hong , Zhenning He , Jianyu Lan , Yahong Yang , Wenju Sang , Zhian Jia , 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":"2025-06-02","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}
Pub Date : 2025-05-29DOI: 10.1016/j.physc.2025.1354742
S. Nishimoto , Y. Ohta
We investigate the interplay between ferromagnetism and unconventional superconductivity in a two-dimensional anisotropic triangular-lattice Hubbard model using the density-matrix renormalization group (DMRG) method. A novel mechanism for spin-triplet f-wave superconductivity is identified, driven by three-site cyclic-exchange interactions. This mechanism highlights the crucial role of lattice anisotropy and triangular hopping networks in stabilizing ferromagnetic correlations necessary for spin-triplet pairing. The slow decay of pair-correlation functions and their sign change under a rotation confirm the dominant f-wave symmetry of the superconducting state. These findings offer a unified theoretical framework for understanding unconventional superconductivity in strongly correlated electron systems, with potential relevance to materials such as Bechgaard salts , cobalt oxide , and layered perovskite .
{"title":"Spin-triplet f-wave pairing via cyclic exchange in the anisotropic triangular Hubbard model: A route to unconventional superconductivity","authors":"S. Nishimoto , Y. Ohta","doi":"10.1016/j.physc.2025.1354742","DOIUrl":"10.1016/j.physc.2025.1354742","url":null,"abstract":"<div><div>We investigate the interplay between ferromagnetism and unconventional superconductivity in a two-dimensional anisotropic triangular-lattice Hubbard model using the density-matrix renormalization group (DMRG) method. A novel mechanism for spin-triplet <em>f</em>-wave superconductivity is identified, driven by three-site cyclic-exchange interactions. This mechanism highlights the crucial role of lattice anisotropy and triangular hopping networks in stabilizing ferromagnetic correlations necessary for spin-triplet pairing. The slow decay of pair-correlation functions and their sign change under a <span><math><mrow><mi>π</mi><mo>/</mo><mn>3</mn></mrow></math></span> rotation confirm the dominant <em>f</em>-wave symmetry of the superconducting state. These findings offer a unified theoretical framework for understanding unconventional superconductivity in strongly correlated electron systems, with potential relevance to materials such as Bechgaard salts <span><math><mrow><msub><mrow><mrow><mo>(</mo><mtext>TMTSF</mtext><mo>)</mo></mrow></mrow><mrow><mn>2</mn></mrow></msub><mtext>X</mtext></mrow></math></span>, cobalt oxide <span><math><mrow><msub><mrow><mtext>Na</mtext></mrow><mrow><mn>0</mn><mo>.</mo><mn>35</mn></mrow></msub><msub><mrow><mtext>CoO</mtext></mrow><mrow><mn>2</mn></mrow></msub><mi>⋅</mi><mn>1</mn><mo>.</mo><mn>3</mn><msub><mrow><mtext>H</mtext></mrow><mrow><mn>2</mn></mrow></msub><mtext>O</mtext></mrow></math></span>, and layered perovskite <span><math><mrow><msub><mrow><mtext>Sr</mtext></mrow><mrow><mn>2</mn></mrow></msub><msub><mrow><mtext>RuO</mtext></mrow><mrow><mn>4</mn></mrow></msub></mrow></math></span>.</div></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"635 ","pages":"Article 1354742"},"PeriodicalIF":1.3,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144170425","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}
Pub Date : 2025-05-24DOI: 10.1016/j.physc.2025.1354752
Dale R. Harshman , Anthony T. Fiory
{"title":"Corrigendum to “Interfacial superconductivity in Cu/Cu2O and its effect on shielding ambient electric fields” [Physica C: Superconductivity and its Applications 632 (2025) 1354600]","authors":"Dale R. Harshman , Anthony T. Fiory","doi":"10.1016/j.physc.2025.1354752","DOIUrl":"10.1016/j.physc.2025.1354752","url":null,"abstract":"","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"636 ","pages":"Article 1354752"},"PeriodicalIF":1.3,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144623657","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}
Pub Date : 2025-05-22DOI: 10.1016/j.physc.2025.1354736
A. Azouaoui , S. Mouchou , Y. Toual , A. Rezzouk , K. Bouslykhane , N. Benzakour , A. Hourmatallah
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 and electron–phonon coupling constant indicate that ReRh2Sn compounds are weak to moderate coupled superconductors. Among the studied compounds, YRh2Sn exhibits the highest superconducting critical temperature T. As the pressure increases from 0 to 10 GPa, the electron–phonon coupling constant () 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 , the Sommerfeld constant (), the specific heat jump at T and the Ginzburg–Landau parameter(). 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.
{"title":"Pressure dependence of the superconducting properties of the rare-earth-based Heusler compounds ReRh2Sn (Re=Sc, Y and Lu)","authors":"A. Azouaoui , S. Mouchou , Y. Toual , A. Rezzouk , K. Bouslykhane , N. Benzakour , 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 ReRh<sub>2</sub>Sn (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 ReRh<sub>2</sub>Sn compounds are weak to moderate coupled superconductors. Among the studied compounds, YRh<sub>2</sub>Sn 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 ScRh<sub>2</sub>Sn and YRh<sub>2</sub>Sn. 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":"2025-05-22","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}
Pub Date : 2025-05-20DOI: 10.1016/j.physc.2025.1354735
Sudip Chakravarty
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 -plane properties. However, here I show that when suitably interpreted, it is also applicable to the -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 -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.
{"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":"2025-05-20","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}
Pub Date : 2025-05-12DOI: 10.1016/j.physc.2025.1354734
S. Ito , M. Kiuchi , T. Horide , Y. Yoshida
Even in REBa2Cu3Oy (REBCO) films, which exhibit high critical current density (Jc) under low-temperature and high-magnetic-field conditions, their performance deteriorates significantly at high-temperatures because of pronounced flux creep induced by thermal agitation. This degradation is particularly pronounced in thin superconducting films, as the thickness constrains the pinning correlation length. In this study, we examined the effect of YBCO film thickness on Jc within the range of 0.94 to 3.7 μm. While some variations were observed depending on crystal orientation, thicker superconducting layers demonstrated a smaller reduction in Jc with increasing magnetic field in high-temperature regions, resulting in superior Jc values under high-temperature and high-magnetic-field conditions. Moreover, the apparent pinning potential , determined from magnetization relaxation measurements, was larger for thicker films in these conditions, indicating that is influenced by the thickness of the superconducting layer. These findings are further supported by the flux creep flow model analysis. Collectively, these results suggest that not only introducing strong pinning forces but also increasing the thickness of the superconducting layer is an effective strategy for enhancing performance near liquid nitrogen temperatures.
{"title":"Critical current density properties of thick YBa2Cu3Oy films with different thicknesses","authors":"S. Ito , M. Kiuchi , T. Horide , Y. Yoshida","doi":"10.1016/j.physc.2025.1354734","DOIUrl":"10.1016/j.physc.2025.1354734","url":null,"abstract":"<div><div>Even in REBa<sub>2</sub>Cu<sub>3</sub>O<em><sub>y</sub></em> (REBCO) films, which exhibit high critical current density (<em>J</em><sub>c</sub>) under low-temperature and high-magnetic-field conditions, their performance deteriorates significantly at high-temperatures because of pronounced flux creep induced by thermal agitation. This degradation is particularly pronounced in thin superconducting films, as the thickness constrains the pinning correlation length. In this study, we examined the effect of YBCO film thickness on <em>J</em><sub>c</sub> within the range of 0.94 to 3.7 μm. While some variations were observed depending on crystal orientation, thicker superconducting layers demonstrated a smaller reduction in <em>J</em><sub>c</sub> with increasing magnetic field in high-temperature regions, resulting in superior <em>J</em><sub>c</sub> values under high-temperature and high-magnetic-field conditions. Moreover, the apparent pinning potential <span><math><msubsup><mi>U</mi><mn>0</mn><mo>*</mo></msubsup></math></span>, determined from magnetization relaxation measurements, was larger for thicker films in these conditions, indicating that <span><math><msubsup><mi>U</mi><mn>0</mn><mo>*</mo></msubsup></math></span> is influenced by the thickness of the superconducting layer. These findings are further supported by the flux creep flow model analysis. Collectively, these results suggest that not only introducing strong pinning forces but also increasing the thickness of the superconducting layer is an effective strategy for enhancing performance near liquid nitrogen temperatures.</div></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"634 ","pages":"Article 1354734"},"PeriodicalIF":1.3,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143937472","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}
Pub Date : 2025-05-10DOI: 10.1016/j.physc.2025.1354746
M.P. Allan , M.S. Golden , N.E. Hussey , K. Schalm , H.T.C. Stoof , E. van Heumen
Under the visionary guidance of Jan Zaanen, a group of researchers within The Netherlands formed a consortium in 2018 to explore the physics of strange metals; its core objective to determine whether strange metals represent a novel quantum critical phase and whether this phase can be described by holographic emergence principles. The consortium itself brought together theorists working on, or at the boundaries of, the Anti-de Sitter/Conformal Field Theory (AdS/CFT) correspondence and experimentalists with collective expertise in optical conductivity, high-field magnetotransport, scanning tunneling spectroscopy (STS) and angle-resolved photoemission spectroscopy (ARPES). For reasons that will become apparent, the experimental team chose to perform their spectroscopy and transport studies on the same crystals of a single cuprate family – (Pb,Bi)2Sr2-xLaxCuO6+δ (Bi2201). Holographic signatures were indeed found in the nodal self energies observed by ARPES. Optical conductivity and magnetotransport also found evidence for the dual character of the strange metal phase, manifest in STS as a real-space differentiation into superconducting and non-superconducting regions. The evolution of the superconducting state with temperature and doping was found to be at odds with a conventional BCS picture. This compendium of the output of that consortium serves as both a tribute to Jan’s vision and perhaps, a signpost for how progress in such a complex field can be made through multiple experiments on the same material.
{"title":"Going Dutch: Jan Zaanen and the strange metals consortium","authors":"M.P. Allan , M.S. Golden , N.E. Hussey , K. Schalm , H.T.C. Stoof , E. van Heumen","doi":"10.1016/j.physc.2025.1354746","DOIUrl":"10.1016/j.physc.2025.1354746","url":null,"abstract":"<div><div>Under the visionary guidance of Jan Zaanen, a group of researchers within The Netherlands formed a consortium in 2018 to explore the physics of strange metals; its core objective to determine whether strange metals represent a novel quantum critical phase and whether this phase can be described by holographic emergence principles. The consortium itself brought together theorists working on, or at the boundaries of, the Anti-de Sitter/Conformal Field Theory (AdS/CFT) correspondence and experimentalists with collective expertise in optical conductivity, high-field magnetotransport, scanning tunneling spectroscopy (STS) and angle-resolved photoemission spectroscopy (ARPES). For reasons that will become apparent, the experimental team chose to perform their spectroscopy and transport studies on the same crystals of a single cuprate family – (Pb,Bi)<sub>2</sub>Sr<sub>2-</sub><em><sub>x</sub></em>La<em><sub>x</sub></em>CuO<sub>6+</sub><em><sub>δ</sub></em> (Bi2201). Holographic signatures were indeed found in the nodal self energies observed by ARPES. Optical conductivity and magnetotransport also found evidence for the dual character of the strange metal phase, manifest in STS as a real-space differentiation into superconducting and non-superconducting regions. The evolution of the superconducting state with temperature and doping was found to be at odds with a conventional BCS picture. This compendium of the output of that consortium serves as both a tribute to Jan’s vision and perhaps, a signpost for how progress in such a complex field can be made through multiple experiments on the same material.</div></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"635 ","pages":"Article 1354746"},"PeriodicalIF":1.3,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144134683","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}
Pub Date : 2025-05-09DOI: 10.1016/j.physc.2025.1354732
Subir Sachdev
{"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":"2025-05-09","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}
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