Modulation of magnetic and electrical properties of bilayer graphene quantum dots using rotational stacking faults

• 来源期刊: 中国物理B（英文版）
• 关键词: bilayer graphene quantum dots rotational stacking faults first-principles calculation
• 年，卷（期）: 2019,（7）
• 页码范围: 576-583
• 页数: 8页
• 语种: 英文
• DOI: 10.1088/1674-1056/28//078106

摘要

Bilayer graphene quantum dots with rotational stacking faults (RSFs) having different rotational angles were studied. Using the first-principles calculation, we determined that these stacking faults could quantitatively modulate the magnetism and the distribution of spin and energy levels in the electronic structures of the dots. In addition, by examining the spatial distribution of unpaired spins and Bader charge analysis, we found that the main source of magnetic moment originated from the edge atoms of the quantum dots. Our research results can potentially provide a new path for producing all-carbon nanodevices with different electrical and magnetic properties.