66 research outputs found
Coupling of the lattice and superlattice deformations and hysteresis in thermal expansion for the quasi one-dimensional conductor TaS
An original interferometer-based setup for measurements of length of
needle-like samples is developed, and thermal expansion of o-TaS crystals
is studied. Below the Peierls transition the temperature hysteresis of length
is observed, the width of the hysteresis loop being up to . The behavior of the loop is anomalous: the length changes so
that it is in front of its equilibrium value. The hysteresis loop couples with
that of conductivity. The sign and the value of the length hysteresis are
consistent with the strain dependence of the charge-density waves (CDW) wave
vector. With lowering temperature down to 100 K the CDW elastic modulus grows
achieving a value comparable with the lattice Young modulus. Our results could
be helpful in consideration of different systems with intrinsic
superstructures.Comment: 4 pages, 3 figures. Phys. Rev. Lett., accepted for publicatio
The metamorphosis of Lewis's dual economy model
This paper argues that Arthur Lewis originally presented the problem of economic development in terms of an open system, in the sense that it focused on a number of possible pitfalls and socio-economic constraints in the process of capital accumulation and industrialization in a labour-surplus economy. In the hands of the neoclassical economists, who were predominantly interested in achieving deterministic equilibrium results by introducing strict assumptions, the theoretical system later became closed - something Lewis never intended. JEL Classifications: B41, O10, O17, O29economic development, dual economy models, development methodology, marketable surplus, open system, closed system,
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