Transport properties of osmium single crystals at high temperatures

Spin-orbit-coupling induced lateral spin transport from first principles

“…We calculate anisotropic spin transport properties for the hcp crystals at RT by setting the z direction along 0001 ( ) and1210 (⊥ ) directions. We reproduce the experimental anisotropy in the resistivity of Re, ρ ⊥ /ρ ∼ 1.3 at RT while that in Os is ρ ⊥ /ρ ∼ 1.1, underpredicted in comparison with the experimental measurements, ρ ⊥ /ρ ∼ 1.5 [110,111]. However, our values are in agreement with calculated anisotropy [112] using a Boltzmann approach [113] including electron-phonon coupling.…”

“…in the z direction are explicitly shown, the separation of the layers is exaggerated and the leads sandwiching this geometry in the ±z-directions are not shown. The x direction is the crystal [110] direction. Part of an fcc layer perpendicular to the [001] direction with in-plane crystallographic directions is shown on the left.…”

“…Hf, Re and Os have hexagonal close packed (hcp) crystal structures which leads to anisotropic scattering rates in the directions parallel ( ) and perpendicular (⊥) to the hexagonal crystal axis (0001). The anisotropy in the resistivity of single crystal samples of Re between 77 -1600 K [91] and Os between 290 -1600 K [110] are reported by experiments while we are not aware of any experimental studies on the anisotropy in Hf. We calculate anisotropic spin transport properties for the hcp crystals at RT by setting the z direction along 0001 ( ) and1210 (⊥ ) directions.…”

“…It turns out that remarkably small supercells are sufficient to eliminate observable effects of the residual periodicity as long as the temperature is not too low [57]. [110], y= [110], z= [001].…”

RuAl and its alloys, Part II: Mechanical properties, environmental resistance and applications

“…Ru possesses a c/a ratio of 1.582. It is generally agreed that slip occurs on the prismatic planes [58,59]. TEM studies of deformed Ru single crystals revealed that high work-hardening rates are caused by primary and secondary dislocations gliding on prismatic planes.…”