Agapito Luis A, Kioussis Nicholas, Kaxiras Efthimios
Department of Physics, California State University, Northridge, California 91330-8268, USA.
Phys Rev B Condens Matter Mater Phys. 2010 Nov 23;82(20):201411. doi: 10.1103/physrevb.82.201411.
Employing ab initio calculations we predict that the magnetic states of hydrogenated diamond-shaped zigzag graphene quantum dots (GQDs), each exhibiting unique electronic structure, can be selectively tuned with gate voltage, through Stark or hybridization electric-field modulation of the spatial distribution and energy of the spin-polarized molecular orbitals, leading to transitions between these states. Electrical read-out of the GQD magnetic state can be accomplished by exploiting the distinctive electrical properties of the various magnetic configurations.
通过从头算计算，我们预测氢化菱形锯齿形石墨烯量子点（GQDs）的磁态可通过栅极电压进行选择性调控。这些量子点均展现出独特的电子结构，通过对自旋极化分子轨道的空间分布和能量进行斯塔克效应或杂化电场调制，可实现这些磁态之间的转变。利用不同磁构型的独特电学性质，可完成对GQD磁态的电学读出。
