Showing papers on "Charge ordering published in 1992"
TL;DR: In this paper, a review of experimental data relating to the Verwey transformation in Fe 3(1−δ) O 4 and Fe 3− x Zn x O 4 is presented.
16 citations
TL;DR: The transport properties of molecular-beam epitaxially grown InSb films doped with Er (atom densities NEr from 43×1016 cm−3 to 36×1020 cm −3) are reported at temperatures between 40 and 400 K.
Abstract: The transport properties of molecular‐beam epitaxially grown InSb films doped with Er (atom densities NEr from 43×1016 cm−3 to 36×1020 cm−3) are reported at temperatures between 40 and 400 K Er is a donor in InSb films grown under Sb to In flux ratios smaller than 11 At a flux ratio Sb/In=106, 25 atoms of Er give one extrinsic electron The maximum extrinsic electron concentration achievable is ∼18×1017 cm−3, obtained for NEr≳4×1018 cm−3 Magnetoresistance measurements at 42 K show evidence for spin–disorder scattering of the electrons The low‐temperature (T<150 K) electron mobility increases with doping concentration up to rare‐earth densities of 1×1018 cm−3; at higher rare‐earth concentrations, the mobility decreases again At room temperature, the mobility decreases monotonically with increasing Er concentration We note the analogy between these results and the observations made on HgSe:Fe, a system in which the carrier mobilities might be enhanced by impurity charge ordering
9 citations
TL;DR: In this article, the local pair (LP) superconductor was investigated by means of a Monte Carlo (MC) method and the ground state phase-diagram in the density versus repulsion/transfer integral plane was calculated, and compared to analytical results.
Abstract: The local Pair (LP) superconductor is investigated by means of a Monte Carlo (MC) method. The ground state phase-diagram in the density versus repulsion/transfer integral plane is calculated, and compared to analytical (RPA) results. The phase diagram features the superconducting phase, a charge-ordered phase and a region where superconductivity and charge ordering coexist. Also, the finite temperature phase diagram and the temperature dependences of the specific heat and the superconducting order parameter are presented.
4 citations
TL;DR: In this article, a simple model of charge ordering in chalcogenides is developed, taking account of the dependence of the atomic charges on the composition of the compound, and it is shown that there may be a critical concentration of atoms of the third component at which the charge-ordered state of the ternary compound is suppressed.
Abstract: A simple model of charge ordering in chalcogenides is developed, taking account of the dependence of the atomic charges on the composition of the compound. Calculations are undertaken for binary and ternary compounds with a structure of CdI2 type. It is shown that there may be a critical concentration of atoms of the third component at which the charge-ordered state of the ternary compound is suppressed. The calculation results for compounds TiSe2, Ti1−cVcSe2, Ti1−cZrcSe2 agree with experimental data.