Coulomb drag and heat transfer in strange metals

We address Coulomb drag and near-field heat transfer in a double-layer system of incoherent metals. Each layer is modeled by an array of tunnel-coupled SYK dots with random inter-layer interactions. Depending on the strength of intra-dot interactions and inter-dot tunneling, this model captures the crossover from the Fermi liquid to a strange metal phase. The absence of quasiparticles in the strange metal leads to temperature-independent drag resistivity, which is in strong contrast with the quadratic temperature dependence in the Fermi liquid regime. We show that all the parameters can be independently measured in near-field heat transfer experiments, performed in Fermi liquid and strange metal regimes.Comment: 5 pages, 3 figures + Supplemental Materia

Socio-economic role of service : sector small business in sustainable development of the Russian economy

The aim of the present article is to summarize the results of the research on the socioeconomic role of small business in the development of the Russian economy and creation of effective mechanisms for its infrastructure support on the basis of the service sector particular qualities. On the basis of statistical data and the results of their own research, the authors prove the increasing importance of service-sector small business in the sustainable development of the Russian economy. At the closing part of the article the authors justify the necessity of the creation of the mechanisms which are able to support the service-sector small business in terms of its features.peer-reviewe