The Fluctuon States of Electrons in Disordered Systems

Abstract

The measurement of the elongational viscosity of polymer solutions and melts has become of major importance in contemporary rheology. This paper describes a new viscometer which is capable of measuring the extremely small loads required to elongate filaments of polymer solutions of low concentration. The data obtained from this instrument are used to evaluate the apparent elongational viscosities of several solutions, and the results are correlated in terms of the strains imposed.

Formation of metallic magnetic clusters in a Kondo-lattice metal: Evidence from an optical study

“…At high temperatures, this state survives until the ferromagnetism vanishes in the vicinity of the critical temperature, associated with the self-localisation energy of an electron in the cluster. The similar droplets (fluctuons), originally anticipated in the papers by Krivoglaz [42,43] and for magnetic systems discussed in [44], can appear as features in the temperature dependence of magnetic susceptibility and resistivity.…”

Nanoscale phase separation in manganites

“…Thus the experimental and theoretical picture strongly confirms a phase-separated state in manganites in the region of low doping. Moreover, we believe that this picture remains qualitatively correct for the concentrations optimal for the CMR effect in the high temperature region T > T C (T C is a Curie temperature), where the ferromagnetic fluctuations of the short range (the temperature polarons) are present [23,33]. Hence, a combination of very intuitive picture of polarons and the ideas of the percolation theory could provide a correct description for the behavior of manganites in the wide range of temperatures and carrier concentrations.…”

Small Angle X-Ray Critical Scattering in an Al–Zn Alloy with the Critical Composition

“…(2). Therefore, the intensity of small angle X-ray scattering is expressed with the only correlation function G (r-r') as (9) where, the correlation function G (r-r') is assumed by (10) and its Fourier transform becomes (11) Here it should be noted that the above equation peared in eq. (8).…”