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High-temperature superconductivity

About: High-temperature superconductivity is a research topic. Over the lifetime, 7263 publications have been published within this topic receiving 175377 citations. The topic is also known as: high-temperature superconductivity.


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Journal ArticleDOI
TL;DR: It is demonstrated that a spin density wave state exists in the metallic phase of electron-doping Sr2IrO4 which provides a link between the electronic phase diagrams of the hole-doped cuprates and the electron- doped iridates, and supports the conjecture that the quenched Mott phases in electron-Doped Sr2 IrO4 and hole- D2CuO4 support common competing electronic phases.
Abstract: Materials that exhibit both strong spin–orbit coupling and electron correlation effects are predicted to host numerous new electronic states. One prominent example is the Jeff = 1/2 Mott state in Sr2IrO4, where introducing carriers is predicted to manifest high temperature superconductivity analogous to the S = 1/2 Mott state of La2CuO4. While bulk superconductivity currently remains elusive, anomalous quasiparticle behaviors paralleling those in the cuprates such as pseudogap formation and the formation of a d-wave gap are observed upon electron-doping Sr2IrO4. Here we establish a magnetic parallel between electron-doped Sr2IrO4 and hole-doped La2CuO4 by unveiling a spin density wave state in electron-doped Sr2IrO4. Our magnetic resonant X-ray scattering data reveal the presence of an incommensurate magnetic state reminiscent of the diagonal spin density wave state observed in the monolayer cuprate (La1−xSr x )2CuO4. This link supports the conjecture that the quenched Mott phases in electron-doped Sr2IrO4 and hole-doped La2CuO4 support common competing electronic phases. Electron-doped Sr2IrO4 is an intriguing material for searching for an unconventional superconducting state. Here the authors demonstrate that a spin density wave state exists in the metallic phase of electron-doped Sr2IrO4 which provides a link between the electronic phase diagrams of the hole-doped cuprates and the electron-doped iridates.

37 citations

Journal ArticleDOI
TL;DR: Ion implantation of 400 keV O+2 ions, at a dose of 5×1014 ions/cm2, was used to selectively decompose a high Tc superconductor-forming metalorganic (MO) as mentioned in this paper.
Abstract: Ion implantation of 400 keV O+2 ions, at a dose of 5×1014 ions/cm2, was used to selectively decompose a high Tc superconductor‐forming metalorganic (MO). Implantation rendered the metal carboxylates insoluble in their solvent, xylene, permitting patterning of the MO prior to pyrolysis and annealing. Fine line superconductors were formed having 90 K onset temperatures and zero resistance at 68 K.

37 citations

Journal ArticleDOI
TL;DR: The recent discovery of superconductivity in some rare earth ternary and actinide compounds has led to considerable experimental and theoretical activity in the field of magnetic superconductors as discussed by the authors.
Abstract: The recent discovery of superconductivity in some rare earth ternary and actinide compounds has led to considerable experimental and theoretical activity in the field of magnetic superconductors. The ternary compounds ErRh4B4 and HoMo6S8 exhibit reentrant superconductivity. Experimental results indicate that superconductivity and long-range ferromagnetic order coexist in a very narrow range of temperature in these two systems. Superconductivity and antiferromagnetic order truly coexist in several rare earth ternary compounds. The most important result is the anomalous behavior of the upper critical field in the vicinity of the Neel temperature. NdRh4B4 displays two antiferromagnetic transitions below the superconducting transition. The pseudoternary series Eu x Sn1−x Mo6S8 containing small amounts of Br or Se exhibits the novel phenomenon of magnetic field-induced superconductivity. The compound Y9Co7 exhibits very weak itinerant ferromagnetic superconductivity. Several cerium- and uranium-based intermetallic compounds, usually known as heavy-electron metals, have been found to exhibit heavy-fermion superconductivity, characterized by a specific heat at low temperature that is two to three orders of magnitude larger than in ordinary transition metals. Several phenomenological and microscopic theories have appeared to explain the observed exciting properties of these magnetic superconductors. A brief survey of experimental and theoretical activity in this field is presented.

37 citations

Journal ArticleDOI
TL;DR: In this article, the electronic states in the CuO 2 -layer have been studied by using the p-d model with the help of the auxiliary boson method for treating the local electronic correlation properly.
Abstract: The electronic states in the CuO 2 -layer have been studied by using the p - d model with the help of the auxiliary boson method for treating the local electronic correlation properly. What have been found are: at sufficiently low temperature the electronic states form coherent bands, whose width and intensity are strongly depending upon number of doped carriers (more significantly for holes than electrons) and the p - d charge transfer energy. In particular, when the number of doped-holes n h is small, a new band form around the Fermi level inside the energy gap and its width and intensity are proportional to n h . Even then the Fermi surface is still determined by the total number of unpaired electrons which are mainly of the localized d -electrons.

37 citations

Journal ArticleDOI
TL;DR: In this paper, the electronic structure of (La1-xSrx)2CuO4 was elucidated by substituting the sites of Cu and La with various 3d and 4f transition elements, respectively.
Abstract: In order to elucidate the electronic structure of (La1-xSrx)2CuO4, the sites of Cu and La were substituted with various 3d and 4f transition elements, respectively. The substitution on the Cu sites at 5 atomic percent level substantially destroyed the superconductivity whereas that on the La sites raised much less adverse effect. The results were discussed in terms of the two-dimensional conduction model based on the planar -Cu-O-Cu-O- linkage.

37 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202334
202258
202169
202084
201987
201883