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

被引：40

作者：

Agapito, Luis A. ^{[1
]}

Kioussis, Nicholas ^{[1
]}

Kaxiras, Efthimios ^{[2
,3
]}

机构：

[1] Calif State Univ Northridge, Dept Phys, Northridge, CA 91330 USA

[2] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[3] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 20期

关键词：

SUSPENDED GRAPHENE; HALF-METALLICITY; NANORIBBONS; ZIGZAG; SPIN;

D O I：

10.1103/PhysRevB.82.201411

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：4

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