The crystal structure of arsenic at 4.2, 78 and 299°K

Abstract

The lattice constants and the atomic position parameter, z, of a high purity, low strain, single‐crystal of arsenic have been determined. Low extinction reflections of filtered Mo Kα and Ag Kα radiation were used for the determination of z. The Bond precision technique with Mo Kα radiation was used for the determination of the unit‐cell dimensions a and c. Average values for a and c in Å, and for z are: 4.2°K z = 0.22764 a = 3.7597 c = 10.4412; 78°K z = 0.22754 a = 3.7595 c = 10.4573; 299±3°K z = 0.22707 a = 3.7598 c = 10.5475. The estimated standard deviation of z is ±0.00004 at 4.2°K, ±0.00002 at 78°K and ±0.00005 at 299°K. The precision of a is estimated to be ±0–0001 Å and that for c to be ±0.0002 Å. The results for As are compared with those reported earlier for Sb and Bi.

Diameter-dependent thermoelectric figure of merit in single-crystalline Bi nanowires

“…85-1329). 30 The large MR and definite SdH oscillations seen in previous studies also indicates the high-quality of the singlecrystalline OFFON-grown Bi NWs. [18][19][20]22 Twelve different Bi NWs with diameters ranging from 21 to 506 nm were used for the TE devices and additional four-probe devices were fabricated to measure the diameter dependence of the resistivity.…”

Unfolding spinor wave functions and expectation values of general operators: Introducing the unfolding-density operator

“…Due to incommensurability between the two lattices [31], it is not possible to simulate graphene@Bi(111) with a single PC of graphene. Notably, this is often the case with epitaxially grown overlayers such as metal-organic interfaces [32] and graphene on metal surfaces [15][16][17][18].…”

Helium-surface interaction potential of Sb(111) from scattering experiments and close-coupling calculations

“…The topmost layer has a hexagonal structure with an atomic spacing of a = (4.3084 ± 0.0002)Å. 45 Including second-layer atoms, the sixfold symmetry of the first layer is broken to a threefold symmetry. Nevertheless, in the HAS measurements in this study, the energy of the incident helium atoms was low enough to neglect influences of other-than-firstlayer atoms.…”