منابع مشابه
AB Electronic Tubes and Quasi-Superconductivity at Room Temperature*
Author offers and researches a new idea – filling tubes by electronic gases. He shows: If the insulating envelope (cover) of the tube is charged positively, the electrons within the tube are not attracted to covering. Tube (as a whole) remains a neutral (uncharged) body. The electron gas in the tube has very low density and very high conductivity, close to superconductivity. If we take the dens...
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By recognizing the vital importance of two-hole Cooper pairs (CPs) in addition to the usual two-electron ones in a strongly-interacting many-electron system, the concept of CPs was re-examined with striking conclusions: namely, they are gapped and linearly-dispersive resonances with a finite lifetime—but provided the ideal-gas Fermi sea is replaced by a BCS-correlated unperturbed ground-state “...
متن کاملEvidence of weak superconductivity at the room-temperature grown LaAlO3/SrTiO3 interface
G. E. D. K. Prawiroatmodjo,1,* F. Trier,2 D. V. Christensen,2 Y. Chen,2 N. Pryds,2 and T. S. Jespersen1 1Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark 2Department of Energy Conversion and Storage, Technical University of Denmark, Risø Campus, 4000 Roskilde, Denmark (Received 1 October 2015; revised manuscript received ...
متن کاملBF3/nano-γ-Al2O3 Promoted Knoevenagel Condensation at Room Temperature
The Knoevenagel condensation of aromatic aldehydes with barbituric acid, dimedone and malononitrile occurred in the presence of BF3/nano-γ-Al2O3 at room temperature in ethanol. This catalyst is characterized by powder X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR), thermal gravimetric analysis (TGA), field emission scanning electron microscopy (FESEM) and energy-disper...
متن کاملSynthesize of Superparamagnetic Zinc Ferrite Nanoparticles at Room Temperature
Superparamagnetic single phase zinc ferrite nanoparticles have been prepared by coprecipitation method at 20 °C without any subsequent calcination. The composition, crystallite size, microstructure and magnetic properties of the prepared nanoparticles were investigated using X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), transmission electron microscope (TEM)...
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ژورنال
عنوان ژورنال: Nature
سال: 1987
ISSN: 0028-0836,1476-4687
DOI: 10.1038/327357a0