Magnetism in doped two-dimensional honeycomb structures of III-V binary compounds

Using first-principles plane-wave calculations systematic study of magnetic properties of doped two-dimensional honeycomb structures of III-V binary compounds have been conducted, either for magnetic or nonmagnetic dopants. Calculations show, that all cases where magnetic moment is non-zero are energetically more favorable. For such cases band structure and (partial) density of states were calculated and analyzed in detail. The possible applications of these structures were also discussed.Comment: 5 pages, 4 figures, 2 tables, sub. to phys. stat. sol.(b

Nuclear tetrahedral configurations at spin zero

The possibility of the existence of stable tetrahedral deformations at spin zero is investigated using the Skyrme-HFBCS approach and the generator coordinate method (GCM). The study is limited to nuclei in which the tetrahedral mode has been predicted to be favored on the basis of non self-consistent models. Our results indicate that a clear identification of tetrahedral deformations is unlikely as they are strongly mixed with the axial octupole mode. However, the excitation energies related to the tetrahedral mode are systematically lower than those of the axial octupole mode in all the nuclei included in this study.Comment: 10 pages, 4 figure

Quantum fluctuations and stability of tetrahedral deformations in atomic nuclei

The possible existence of stable axial octupole and tetrahedral deformations is investigated in $^{80}$Zr and $^{98}$Zr. HFBCS calculations with parity projection have been performed for various parametrizations of the Skyrme energy functional. The correlation and excitation energies of negative parity states associated with shape fluctuations have been obtained using the generator coordinate method (GCM). The results indicate that in these nuclei both the axial octupole and tetrahedral deformations are of dynamic character and possess similar characteristics. Various Skyrme forces give consistent results as a function of these two octupole degrees of freedom both at the mean-field level as well as for configuration mixing calculations.Comment: 8 pages, 4 figures, submitted to IJMP

Magnetism in Doped Two-Dimensional Honeycomb Structures of IIIV Binary Compounds

Using rst-principles plane-wave calculations study of magnetic properties of doped two-dimensional honeycomb structures of IIIV binary compounds have been conducted for either nonmagnetic dopants or vacancies. Calculations show that all cases where magnetic moment is non-zero, are energetically more favorable. For such cases band structure and density of states were calculated and analyzed in detail. The possible applications of these structures were also discussed