Josephson properties of the three-dimensional regular lattice of the weakly coupled nanoparticles

Investigation into the Electrical and Optical Properties of Sodium Nitrite and Sodium Nitrate Nanoparticles in Regular Porous Matrices

“…Investigations into the electrical properties of opal-based composites were started in the 1980s [14]. It was shown that opals filled with superconducting metals can be used to prepare regular systems of identical Josephson junctions with a very high concentration (of the order of 10 12 cm -3 ) [14][15][16]. The study of the dielectric properties of opals filled with NaNO 2 revealed a very interesting effect, namely, a giant increase (to 10 8 ) in the real part ε ' of the permittivity of the o-NaNO 2 composite at temperatures in the melting range of sodium nitrite particles [17].…”

Nanostructured Coatings of Inner Surfaces in Microporous Matrixes

“…Defects of this secondary lattice are the same as those of ordinary atomic crystals, and therefore the samples are polycrystals consisting of crystallites with characteristic size near 0.01 cm [23]. This object demonstrated properties characteristic of the Josephson systems [21,23,24]. The oscillating dependence of the critical current magnitude on the external magnetic field for such samples was observed and its example is shown in Fig.2 ( from [23]).…”

“…This object demonstrated properties characteristic of the Josephson systems [21,23,24]. The oscillating dependence of the critical current magnitude on the external magnetic field for such samples was observed and its example is shown in Fig.2 ( from [23]). Such dependence may be connected with a regular structure of investigated materials.…”

“…The density of weak links in this material is near 101 4 cm"3. Defects of this secondary lattice are the same as those of ordinary atomic crystals, and therefore the samples are polycrystals consisting of crystallites with characteristic size near 0.01 cm [23]. This object demonstrated properties characteristic of the Josephson systems [21,23,24].…”

“…This matrix itself is interesting as a material for so-called photonic crystals, that behave with respect to photons like a dielectric crystal does with respect to electron waves and demonstrates the photonic gap phenomenon [20]. The lattices of nanosize metal particles may be prepared by impregnation of the opal matrix by molten metal under high hydrostatic pressure conditions [21][22][23][24][25]. The shape of the metal grains is a precise copy of the void configuration since the metal occupies all free matrix volume.…”