M. Prester

Experimental evidence of a fractal dissipative regime in high- T c superconductors

We report on our experimental evidence of a substantial geometrical ingredient characterizing the problem of incipient dissipation in high-

Influence of internal disorder on the superconducting state in the organic layered superconductor k-(BEDT-TTF)2Cu[N(CN)2]Br

{T}_{c}

Variation with density of the transport properties of YBaCuO superconductors

superconductors (HTSs): high-resolution studies of differential resistance-current characteristics in the absence of magnetic field enabled us to identify and quantify the fractal dissipative regime inside which the actual current-carrying medium is an object of fractal geometry. The discovery of a fractal regime proves the reality and consistency of a critical-phenomena scenario as a model for dissipation in inhomogeneous and disordered HTSs, gives the experimentally based value of the relevant finite-size scaling exponent, and offers some interesting new guidelines to the problem of pairing mechanisms in HTSs.

Novel spin lattice in Cu3TeO6: an antiferromagnetic order and domain dynamics

We report high-sensitivity ac susceptibility measurements of the penetration depth in the Meissner state of the layered organic superconductor

Critical currents and differential resistance of YBa2Cu3O7-x superconducting ceramics

\ensuremath{\kappa}\ensuremath{-}(\mathrm{B}\mathrm{E}\mathrm{D}\mathrm{T}\ensuremath{-}\mathrm{T}\mathrm{T}\mathrm{F}{)}_{2}\mathrm{Cu}[\mathrm{N}(\mathrm{CN}{)}_{2}]\mathrm{Br}.

Ground-state order and spin-lattice coupling in tetrahedral spin systems Cu 2 Te 2 O 5 X 2 ( X = Br or Cl)

We have studied nominally pure single crystals from the two different syntheses and employed controlled cooling procedures in order to minimize intrinsic remnant disorder at low temperatures associated with the glass transition, caused by ordering of the ethylene moieties in BEDT-TTF molecule at

Percolation effects in the V-I characteristics of granular YBa2Cu3O7−δ

{T}_{\mathrm{G}}=75\mathrm{K}.

Slow magnetic dynamics and hysteresis loops of the bulk ferromagnet Co7(TeO3)4Br6

We find that the optimal cooling procedures (slow cooling of

Structure and electronic properties of La-Sr-Cu oxide ceramics

\ensuremath{-}0.2\mathrm{K}/\mathrm{h}

Critical current distributions in YBa2Cu3O7−x ceramics

or annealing for 3 days in the region of