Topic
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.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, high-quality c-axis oriented thin films have been grown in situ on (100) surfaces of ZrO2, SrTiO3, and MgO.
Abstract: High‐quality c‐axis oriented thin films have been grown in situ on (100) surfaces of ZrO2 , SrTiO3 , and MgO. Sharp transitions to superconductivity were observed with Tc,off of 87–89.5 K for films thicker than 70 A. The critical current density at 77.3 K was found to be strongly dependent on the film thickness. A maximum value was found for a 100‐A film with 8×106 A/cm2 at 77.3 K. On atomically flat single‐crystal MgO substrates, films as thin as 15 A revealed a full transition to superconductivity above 45.5 K. The superconducting properties of the films turned out to be quite insensitive to the deposition parameters, such as substrate temperature, oxygen partial pressure, sputter power, etc.
68 citations
TL;DR: Calcul par les methodes de couplage faible de l'interaction effecive entre les quasi-particules, induite par les fluctuations de charge ou de spin dans un modele a 3 bandes pour les supraconducteurs avec une repulsion inter- et intrasite.
Abstract: We use weak-coupling methods to calculate the effective interaction between quasiparticles induced by charge and spin fluctuations in a three-band model for the copper-oxide superconductors with both intersite and intrasite repulsion. The instabilities to superconducting states of different symmetries are calculated; besides the d-wave superconductivity near the antiferromagnetic instability, we find that extended s-wave superconductivity is favored by a charge transfer resonance close to a valence instability. A phase diagram similar to experiments is obtained.
68 citations
TL;DR: In this article, a 120 K Tl−Ca−Ba−Cu−O superconductor is presented, which can be prepared in a molten state, which should allow processing leading to high critical current density.
Abstract: Electronic and magnetic properties of the new 120 K Tl‐Ca‐Ba‐Cu‐O superconductor are presented. Resistance‐temperature variations, ac susceptibility, and the (low) magnetic field dependence of the critical current density are reported. The new superconductor can be prepared in a molten state, which should allow processing leading to high critical current density. Preliminary x‐ray diffraction data are also presented.
68 citations
TL;DR: In this paper, an overview of the work that has been performed on high-temperature superconductor superlattices, with a special emphasis on the superconducting properties of multilayers.
Abstract: We present in this paper an overview of the work that has been performed on high-temperature superconductor superlattices, with a special emphasis on the superconducting properties of multilayers. The critical temperature and superconductivity in ultra-thin films, the vortex dynamics, and the field-temperature vortex phase diagram in multilayers are studied and compared to bulk behaviour. In particular, the roles of the individual layer thicknesses and the conductivity of the spacer material are studied, as well as the coupling between superconducting layers and the effect of finite multilayer thickness. Comparisons with other systems are made, and an interpretation is proposed for the understanding of superconductivity in ultra-thin oxide films. The field-temperature vortex phase diagram is determined in coupled multilayers and compared to single crystal results. Finally, we discuss the development of novel oxide systems and heterostructures, and the possibilities brought out by new material combinations.
68 citations
68 citations