Contributions to HFS and to the Lamb shift intervals of order α(Zα) induced by the graph with the two-loop overlapping electron self-energy diagram inserted in the electron line are considered. Explicit expression for the overlapping two-loop self-energy diagram in the Fried-Yennie gauge is obtained. Contributions both to HFS and Lamb shift induced by the diagram containing such subgraph are ca...

A new topology optimization algorithm is proposed based on bi-directional evolutionary structural optimization (BESO) method in order to design photonic crystals with maximum band gaps. The optimization process starts from a simple unit cell without band gap, and the photonic crystals are assumed to be periodically composed of two materials with different permittivity. Based on finite element a...

ZnO and ZnO: Mn nanocrystals synthesized via reverse micelle method. The structural properties nanocrystals were investigated by XRD and Transmission electron microscopy (TEM). The XRD results indicate that the synthesized nanocrystals had a pure wurtzite (hexagonal phase) structure. The various optical properties of these nanocrystals such as optical band gap energy, refractive index, dielectr...

In this work facile sol-gel (pechni) method has been successfully established to synthesize Zn4B6O13 nanocrystals which have cubic crystals with lattice parameter: a =7.48 A. The structure and morphology of the obtained material were studied by X-ray diffraction (XRD), Infrared spectra (IR), scanning electron microscopy (SEM) and photoluminescence analysis. The experimental results show a band ...

In this work facile sol-gel (pechni) method has been successfully established to synthesize Zn4B6O13 nanocrystals which have cubic crystals with lattice parameter: a =7.48 A. The structure and morphology of the obtained material were studied by X-ray diffraction (XRD), Infrared spectra (IR), scanning electron microscopy (SEM) and photoluminescence analysis. The experimental results show a band ...

S. Shallcross,1,2,* L. Nordström,3 and S. Sharma4,5 1Lehrstuhl für Theoretische Festkörperphysik, Staudstrasse 7-B2, 91058 Erlangen, Germany 2Department of Physics, Technical University of Denmark, Building 307, DK-2800 Kongens Lyngby, Denmark 3Department of Physics, Condensed Matter Theory Group, Box 530, SE-751 21 Uppsala, Sweden 4Fritz Haber Institute of the Max Planck Society, Faradayweg 4-...

$3{d}^{2}$ vanadate perovskites exhibit an unusual phase diagram where the low temperature orbital and spin orders are strongly dependent upon rare-earth cation size. Here, we demonstrate delicate role of strain in epitaxial ${\mathrm{LaVO}}_{3}$ films by performing low-energy muon spectroscopy ellipsometry measurements. The electronic structure is revealed measurement multipeak charge excitati...

1) Graduate School of Energy Science and Technology, Kyoto University, Yoshida Honmachi, Sakyoku, Kyoto, 606-8501 Japan. 2) Formerly Graduate Student, Graduate School of Eng., Hokkaido University. Now at Nippon Steel Corporation. Ohita Works, Nishi-no-su, Ohita, 870-0992 Japan. 3) Graduate School of Eng., Faculty of Engineering, Hokkaido University. Kita-13Jou, Nishi-8Choume, Kita-ku, Sapporo, ...