Thermodynamic properties of thin films of superfluid 3He-A

The pairing correlations in superfluid He-3 are strongly modified by quasiparticle scattering off a surface or an interface. We present theoretical results and predictions for the order parameter, the quasiparticle excitation spectrum and the free energy for thin films of superfluid He-3. Both specular and diffuse scattering by a substrate are considered, while the free surface is assumed to be a perfectly reflecting specular boundary. The results are based on self-consistent calculations of the order parameter and quasiparticle excitation spectrum at zero pressure. We obtain new results for the phase diagram, free energy, entropy and specific heat of thin films of superfluid He-3.Comment: Replaced with an updated versio

Magnetic field - temperature phase diagram of quasi-two-dimensional organic superconductor lambda-(BETS)_2 GaCl_4 studied via thermal conductivity

The thermal conductivity kappa of the quasi-two-dimensional (Q2D) organic superconductor lambda-(BETS)_2 GaCl_4 was studied in the magnetic field H applied parallel to the Q2D plane. The phase diagram determined from this bulk measurement shows notable dependence on the sample quality. In dirty samples the upper critical field H_{c2} is consistent with the Pauli paramagnetic limiting, and a sharp change is observed in kappa(H) at H_{c2 parallel}. In contrast in clean samples H_{c2}(T) shows no saturation towards low temperatures and the feature in kappa(H) is replaced by two slope changes reminiscent of second-order transitions. The peculiarity was observed below ~ 0.33T_c and disappeared on field inclination to the plane when the orbital suppression of superconductivity became dominant. This behavior is consistent with the formation of a superconducting state with spatially modulated order parameter in clean samples.Comment: 10 pages, 8 figures, new figure (Fig.5) and references added, title change

The Frequency and Width of a Surface Plasmon in a Small Cluster

he dependence of the frequency and width of a surface plasmon s on the cluster size is analyzed. In the process of the investigation, a large numerical parameter appears that determines the shape of the potential of the electromagnetic field inside the cluster and leads to a wide plateau on the dependence of s on the cluster radius. ©2002 MAIK "Nauka / Interperiodica"

Investigation of the Effect of External Local Sealing Loads on the Well Support

The article presents the definition of problems in the well support from external local sealing loads. The conditions of local sealing loads are identified. The calculations were carried out according to the equations. A model of the stress-strain state in the well support has been created. The parameters of the effect of compression on the absolute value of strength are determined

The model of electric initiation of detonation in a detonator channel

Abstract: In this paper the mathematical model of initiation of detonation by the use of electric charge is described. The numerical results of detonation modeling in a cylindrical channel, obtaining with the use of 2D gas dynamic numerical program H3T, are investigated. The various regimes of detonation are compared for various initial conditions and densities. The numerical simulation results are compared with experimental data.Note: Research direction:Mathematical modelling in actual problems of science and technic