Proudhon’s Concept of Sociology

Analiza Proudhonovog shvaćanja sociologije, tj. »društvene znanosti« započinje njegovom postavkom o kolektivnim snagama koje se ne mogu svesti na individualne snage. Autor teksta iznosi i detaljno analizira njegove stavove o društvu kao jedinstvu kolektivne akcije, klasama, klasnoj svijesti, tipovima kapitalizma, realnosti države, alijenaciji, ideji pravde (društvenih propisa), dijalektici itd. U devet točaka iznosi osnovne značajke Proudhonove sociologije da bi se na kraju osvrnuo i na neke teškoće u njegovoj koncepciji naglašavajući ipak bogatstvo i privlačnost njegovih ideja.The analysis of Proudhon’s understanding of sociology, i.e. »the humanities«, starts with his thesis on the collective forces that cannot be reduced to individual forces. The author of the text carries out a detailed analysis of Proudhon’s views of society as a unity of collective action, social classes, the awareness of social class, types of capitalism, the reality of the state, alienation, the ideas of law (written law), dialectics etc. The basic characteristics\u27 of Proudhon’s sociology has been carried out showing some difficulties in his conception of sociology though stressing the wealth and attraction of his ideas

Resistivity saturation revisited: results from a dynamical mean field theory

We use the dynamical mean field method to study the high-temperature resistivity of electrons strongly coupled to phonons. The results reproduce the qualtiative behavior of the temperature and disorder dependence of the resistivity of the 'A-15' materials, which is commonly described in terms of saturation, but imply that the resistivity does not saturate. Rather, a change in temperature dependence occurs when the scattering becomes strong enough to cause a breakdown of the Migdal approximation.Comment: Minor revisions in response to referee report; latex error corrected so paper prints properl

Transport properties of strongly correlated metals:a dynamical mean-field approach

The temperature dependence of the transport properties of the metallic phase of a frustrated Hubbard model on the hypercubic lattice at half-filling are calculated. Dynamical mean-field theory, which maps the Hubbard model onto a single impurity Anderson model that is solved self-consistently, and becomes exact in the limit of large dimensionality, is used. As the temperature increases there is a smooth crossover from coherent Fermi liquid excitations at low temperatures to incoherent excitations at high temperatures. This crossover leads to a non-monotonic temperature dependence for the resistance, thermopower, and Hall coefficient, unlike in conventional metals. The resistance smoothly increases from a quadratic temperature dependence at low temperatures to large values which can exceed the Mott-Ioffe-Regel value, hbar a/e^2 (where "a" is a lattice constant) associated with mean-free paths less than a lattice constant. Further signatures of the thermal destruction of quasiparticle excitations are a peak in the thermopower and the absence of a Drude peak in the optical conductivity. The results presented here are relevant to a wide range of strongly correlated metals, including transition metal oxides, strontium ruthenates, and organic metals.Comment: 19 pages, 9 eps figure

Band-width control in a perovskite-type 3d^1 correlated metal Ca_{1-x}Sr_xVO_3. I. Evolution of the electronic properties and effective mass

Single crystals of the perovskite-type $3d^{1}$ metallic alloy system Ca$_{1-x}$Sr$_x$VO$_3$ were synthesized in order to investigate metallic properties near the Mott transition. The substitution of a Ca$^{2+}$ ion for a Sr$^{2+}$ ion reduces the band width $W$ due to a buckling of the V-O-V bond angle from $\sim180^\circ$ for SrVO$_3$ to $\sim160^\circ$ for CaVO$_3$. Thus, the value of $W$ can be systematically controlled without changing the number of electrons making Ca$_{1-x}$Sr$_x$VO$_3$: one of the most ideal systems for studying band-width effects. The Sommerfeld-Wilson's ratio ($\simeq2$), the Kadowaki-Woods ratio (in the same region as heavy Fermion systems), and a large $T^{2}$ term in the electric resistivity, even at 300 K, substantiate a large electron correlation in this system, though the effective mass, obtained by thermodynamic and magnetic measurements, shows only a systematic but moderate increase in going from SrVO$_3$ to CaVO$_3$, in contrast to the critical enhancement expected from the Brinkmann-Rice picture. It is proposed that the metallic properties observed in this system near the Mott transition can be explained by considering the effect of a non-local electron correlation.Comment: 14 pages in a Phys. Rev. B camera-ready format with 10 EPS figures embedded. LaTeX 2.09 source file using "camera.sty" and "prbplug.sty" provided by N. Shirakawa. For OzTeX (Macintosh), use "ozfig.sty" instead of "psfig.sty". "ozfig.sty" can be also obtained by e-mail request to N. Shirakawa: . Submitted to Phys. Rev.

Principaux extraits de l'œuvre de Georges Gurvitch traitant de l'autogestion

Gurvitch Georges. Principaux extraits de l'œuvre de Georges Gurvitch traitant de l'autogestion. In: Autogestion : études, débats, documents, N°1, 1966. pp. 13-57

Théories de l'expérience intégrale de l'immédiat

Reproduction of an extract of Georges Gurvitch’s book Morale théorique et science des mœurs, first published in 1937, preceded by an introduction by Francis Farrugia

Conscience et Société. — Les faux problèmes de la sociologie du XXe siècle

Gurvitch Georges. Conscience et Société. — Les faux problèmes de la sociologie du XXe siècle. In: Bulletin du Groupe d'études de psychologie de l'Université de Paris, 2e année n°10-12, 1949. pp. 14-25