Electric-field control of magnetism in graphene quantum dots: Ab initio calculations.

Electric-field control of magnetism in graphene quantum dots: Ab initio calculations.
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DOI:
10.1103/physrevb.82.201411
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发表时间:
2010-11-23
期刊:
Physical review. B, Condensed matter and materials physics
影响因子:
--
通讯作者:
Kaxiras E
Kaxiras E
中科院分区:
其他
文献类型:
--
作者:
Agapito LA;Kioussis N;Kaxiras E

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利用从头算方法,我们预测了具有独特电子结构的氢化钻石形之字形石墨烯量子点(GQD)的磁态可以通过斯塔克或杂化电场对自旋极化分子轨道的空间分布和能量的调制来选择性地随栅极电压而调节,从而导致这些态之间的跃迁。GQD磁状态的电读出可以通过利用各种磁配置的独特的电属性来实现。
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.
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