کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1591803 | 1515605 | 2014 | 5 صفحه PDF | دانلود رایگان |
• We perform first-principles calculation to study the two-dimensional germanene and silicene hybrid sheet (GeSiHS) saturated with brominate atoms (Br).
• Half-brominated GeSiHS exhibits half-metallic character with 100% spin-polarized currents at the Fermi level.
• The half-brominated GeSiHS consists of only sp elements.
• The half-brominated GeSiHS is expected to be FM around room temperature with net magnetic moment 1.0 μB per unit cell.
• The half-metallic character is expected to be robust because the partially filled bands result from a large number of holes.
In this theoretical work, we perform first-principles calculation to study the geometric, electronic, and magnetic properties of the two-dimensional germanene and silicene hybrid sheet (GeSiHS) saturated with brominate atoms (Br). Although the pristine GeSiHS is semi-metallic, half-saturation on only a single side of Si atoms with Br results in the localized and unpaired electrons in unsaturated Ge atoms, showing long-range ferromagnetic (FM) properties with a high Curie temperature. Interestingly, half-brominated GeSiHS exhibits half-metallic character with 100% spin-polarized currents at the Fermi level. These findings provide the possibility of GeSiHS as promising building blocks for spintronic devices.
Journal: Solid State Communications - Volume 191, August 2014, Pages 49–53