Exact phase diagrams for an Ising model on a two-layer Bethe lattice

Using an iteration technique, we obtain exact expressions for the free energy and the magnetization of an Ising model on a two - layer Bethe lattice with intralayer coupling constants J1 and J2 for the first and the second layer, respectively, and interlayer coupling constant J3 between the two layers; the Ising spins also couple with external magnetic fields, which are different in the two layers. We obtain exact phase diagrams for the system.Comment: 24 pages, 2 figures. To be published in Phys. Rev. E 59, Issue 6, 199

Photophoresis of topical steroids in the treatment of severe forms of lichen ruber planus of oral mucosa

The objective of the study is to search for new methods of treatment for lichen ruber planus with high efficacy, few complications and side effects, as well as providing a long-term therapeutic effect. The authors used the method of photophoresis (red LED radiation + topical steroid) in the combination treatment of 40 patients with severe forms of lichen ruber planu

Photophoresis of topical steroids in the treatment of severe forms of lichen ruber planus of oral mucosa

The objective of the study is to search for new methods of treatment for lichen ruber planus with high efficacy, few complications and side effects, as well as providing a long-term therapeutic effec

Strongly nonlinear magnetization above TcT_c in Bi2Sr2CaCu2O8+δ\rm Bi_2Sr_2CaCu_2O_{8+\delta}

Using high-resolution magnetometry we have investigated in detail the magnetization $M$ above the critical temperature $T_c$ in $\rm Bi_2Sr_2CaCu_2O_{8+\delta}$. In a broad range of temperature $T$ above $T_c$, we find that $M(T,H)$ is strongly non-linear in the field $H$. We show that as $T\to T_c$, the susceptibility $\chi(T,H)$ diverges to very large values ($\chi \to$ -1) if measured in weak $H$. In addition, $M(H)$ displays an anomalous non-analytic form $M\sim H^{1/\delta}$ in weak fields with a strongly $T$-dependent exponent $\delta(T)$. These features strongly support the proposal that, above $T_c$, the pair condensate survives to support significant London rigidity.Comment: 5 pages, 5 figure