Size effect of strong-coupled superconducting In2Bi nanoparticles: An investigation of short-range electron phonon coupling

Abstract

Size and polydispersity effect on the magnetization of densely packed magnetic nanoparticles J. Appl. Phys. 112, 073926 (2012); 10.1063/1.4757418Comparative study on size dependence of melting temperatures of pure metal and alloy nanoparticles Appl. Phys. Lett. 99, 013108 (2011); 10.1063/1.3607957Effect of particle size and annealing on spin and phonon behavior in TbMnO3

Role of cobalt cations in short range antiferromagnetic Co3O4 nanoparticles: a thermal treatment approach to affecting phonon and magnetic properties

“…The mean diameter and standard deviation of Co 3 O 4 nanoparticles annealed at 450, 600, 700, and 800 °C were obtained after fitting the log-normal function, that is < d > = 13 ± 1, 48 ± 4, 60 ± 5, 165 ± 21 nm and σ  = 0.23 ± 0.11, 0.30 ± 0.09, 0.27 ± 0.09, 0.41 ± 0.16 nm, respectively. The value of σ is below 0.3 nm for nanoparticles annealed at 450, 600, and 700 °C indicating the distributions of nanoparticles is confined within a narrow range 24 , whereas the distribution of nanoparticles annealed at 800 °C is confined within the intermediate range 25 . Energy-dispersive spectroscopy (EDS) technique is used to detect the chemical purity and estimate the atomic percentage in a given sample 23,24 .…”

Downscaling Effect on the Superconductivity of Pd3Bi2X2 (X = S or Se) Nanoparticles Prepared by Microwave-Assisted Polyol Synthesis

“…Bars of Pd 3 Bi 2 X 2 (X = S or Se) nanoparticles demonstrate silver-metallic shine and have a density of 7.21 g/cm 3 (75% of theoretical density) for Pd 3 Bi 2 S 2 and 7.47 g/cm 3 (75% of theoretical density) for Pd 3 Bi 2 Se 2 . Notably, the measured densities of the as-sintered samples are only approximately 3−4 g/cm 3 . When the samples are heated to 200 °C with a 2 min hold time, the morphology of the individual nanoparticles can be preserved.…”

“…Superconducting properties of nanoparticles and nanocomposites have attracted great interest in light of the exploration of novel finite-size phenomena. − Nanoscaling may affect the density of states (DOS) around the Fermi energy ( E F ) as well as electron–electron and electron–phonon interactions that make pairing more or less favorable and, thereby, changes the energy gap (Δ) and the superconducting temperature ( T c ). ,− Moreover, it is shown that the superconducting energy gap as well as the critical field ( H c ) can be varied by tuning the particle size. ,, To date, experimental studies in the field of nanostructured superconductors have been primarily focused on elemental superconductors, − ,, although extending them to more complex systems seems to be interesting. It is worth noting that good synthetic approaches based on wet chemistry have been developed for nanosized elemental superconductors such as Pb, Sn, In, etc., − but the synthesis of submicrometer particles of binary and ternary compounds in many cases remains challenging because of the presence of impurity phases and uncontrollable stoichiometry. − …”

“…1,7−9 Moreover, it is shown that the superconducting energy gap as well as the critical field (H c ) can be varied by tuning the particle size. 2,9,10 To date, experimental studies in the field of nanostructured superconductors have been primarily focused on elemental superconductors, [1][2][3][4][5][6]10,11 although extending them to more complex systems seems to be interesting. It is worth noting that good synthetic approaches based on wet chemistry have been developed for nanosized elemental superconductors such as Pb, Sn, In, etc., 11−14 but the synthesis of submicrometer particles of binary and ternary compounds in many cases remains challenging because of the presence of impurity phases and uncontrollable stoichiometry.…”