Preserving the half-metallicity at the Heusler alloy Co2MnSi(001) surface: a density functional theory study |
| |
Authors: | Hashemifar S Javad Kratzer Peter Scheffler Matthias |
| |
Institution: | Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany. |
| |
Abstract: | We have studied the stability, the electronic, and the magnetic properties of Co2MnSi(001) thin films for 15 different terminations using density functional theory calculations. The phase diagram obtained by ab initio atomistic thermodynamics shows that in practice the MnSi, pure Mn, or pure Si terminated surfaces can be stabilized under suitable conditions. Analyzing the surface band structure, we find that the pure Mn termination, due to its strong surface-subsurface coupling, preserves the half-metallicity of the system, while surface states appear for the other terminations. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|