Institute of Strength Physics and Materials Science SB RAS

About: Institute of Strength Physics and Materials Science SB RAS is a based out in . It is known for research contribution in the topics: Deformation (engineering) & Microstructure. The organization has 692 authors who have published 724 publications receiving 7390 citations. The organization is also known as: Federal State Institution of Science Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences.

Role of spin-orbit coupling and hybridization effects in the electronic structure of ultrathin Bi films

Abstract: The electronic structure of Bi(001) ultrathin films (thickness > or =7 bilayers) on Si(111)-7x7 was studied by angle-resolved photoemission spectroscopy and first-principles calculations. In contrast with the semimetallic nature of bulk Bi, both the experiment and theory demonstrate the metallic character of the films with the Fermi surface formed by spin-orbit-split surface states (SSs) showing little thickness dependence. Below the Fermi level, we clearly detected quantum well states (QWSs) at the M point, which were surprisingly found to be non-spin-orbit split; the films are "electronically symmetric" despite the obvious structural nonequivalence of the top and bottom interfaces. We found that the SSs hybridize with the QWSs near M and lose their spin-orbit-split character.

First-principles investigation of structural and electronic properties of ultrathin Bi films

Abstract: Employing first-principles calculations, we perform a systematic study of the electronic properties of thin (one to six bilayers) films of the semimetal bismuth in (111) and (110) orientation. Due to the different coordination of the surface atoms in these two cases, we find a large variation of the conducting properties of the films, ranging from small-band-gap semiconducting to semimetallic and metallic. The evolution of the Bi(111) and Bi(110) surface states can be monitored as a function of the film thickness. Another interesting feature is provided by the strong spin-orbit effects in Bi and the resulting Rashba-type spin splitting of the surface states. The relaxations, band structures, Fermi surfaces, and densities of states are presented and discussed with respect to possible applications in the field of spintronics.

Influence of layer-by-layer laser sintering conditions on the quality of sintered surface layer of products

Abstract: The influence of technological modes of sintering: the displacement velocity of laser beam V, laser power P, scanning step S and preheating temperature of powder material t on the quality of sintered surface layer of aluminum powder PA-4, copper powder PMS-1 and cobalt- chromium-molybdenum powder DSK-F75 were studied.