A world catalogue of Phragmataecia (Lepidoptera: Cossidae), with a new species from Kazakhstan and Kyrgyzstan.

Phragmataecia valikhanovi Yakovlev & Witt sp. nov. is described from Kazakhstan and Kyrgyzstan.

A new species of Isoceras Turati, 1924 (Lepidoptera: Cossidae) from Armenia.

Isoceras shevnini Yakovlev sp. nov. is described from Armenia.

A new species of Isocossus Roepke, 1957 (Lepidoptera: Cossidae) from Vietnam, including a world catalogue of the genus.

Isocossus zolotuhini Yakovlev sp. nov. is described from central Vietnam.

Orientozeuzera martinii sp. nov., a new species of Carpenter-Moths (Lepidoptera: Cossidae) from Borneo.

Orientozeuzera martinii Yakovlev & Witt sp. nov. is described from Borneo Island (Trus Madi).

The Cossidae (Lepidoptera) of Afghanistan with description of three new species and special notes on the fauna of Bande-Amir National Park.

The annotated list of Cossidae of Afghanistan consists of 44 species in 17 genera from the four subfamilies Catoptinae, Cossinae, Zeuzerinae, and Mehariinae. Three new species are described: Cossulus habibae Yakovlev, Pljustch, Skrylnik & Pak, sp. nov.

Atomic arrangement and electron band structure of Si(1 1 1)-ß-√3 x √3-Bi reconstruction modified by alkali-metal adsorption: ab initio study.

Using ab initio calculations, atomic structure and electronic properties of Si(1 1 1)[Formula: see text]-Bi surface modified by adsorption of 1/3 monolayer of alkali metals, Li, Na, K, Rb and Cs, have been explored. Upon adsorption of all metals, a similar atomic structure develops at the surface where twisted chained Bi trimers are arranged into a honeycomb network and alkali metal atoms occupy the [Formula: see text] sites in the center of each honeycomb unit. Among other structural characteristics, the greatest variation concerns the relative heights at which alkali metals reside with respect to Bi-trimer layer.

Modelling near-surface bound electron states in a 3D topological insulator: analytical and numerical approaches.

We apply both analytical and ab-initio methods to explore heterostructures composed of a 3D topological insulator (3D TI) and an ultrathin normal insulator (NI) overlayer as a proving ground for the principles of topological phase engineering. Using the continual model of a semi-infinite 3D TI we study the surface potential (SP) effect caused by an attached ultrathin layer of 3D NI on the formation of topological bound states at the interface. The results reveal that the spatial profile and spectrum of these near-surface states strongly depend on both the sign and the strength of the SP.