Peculiarities in low temperature properties of doped manganites A B MnO

Abstract

The phase diagram and low temperature properties of the doped manganites

Intrinsic inhomogeneity and the origin of the pseudogap

“…This cubic structure represents our starting point. In addition, the Mn 3+ is caged by the O -2 octahedron ; locally this forms an MnO 6 …”

“…It is essential, and this is demonstrated in our papers [2][3][4]6] that this is sufficient to explain the major properties of manganites. It will be proven (see below) that the undoped compounds can be treated as band insulators.…”

“…The evaluation of the Fermi surface for FMS and analysis of the optical properties and the spin-wave spectrum has been describe in detail in [6]. The analysis is interesting for its own sake, but, in addition, allows one to evaluate the major parameters of our model.…”

“…[15]) allow us to calculate the mean free path l. The calculation is based on the relation ρ=m(ne 2 τ) Making use of the spectrum (15), we calculate the concentration dependence of the Fermi-level, E F (x), the density of states (DOS), ν(x), the spin stiffness, D(x), and the whole magnon spectrum, ω(k,x), and the conductivity, σ(ω,x), both on the single hopping integral, Α, see [6].…”

“…In this paper we focus mainly on the low temperature region, that is on the ground state of the system. Our approach was described in [2][3][4][5][6]. Below we present key points of our treatment and introduce some new aspects.…”