Electronic states and magnetotransport in unipolar and bipolar graphene ribbons

被引：37

作者：

Cresti, Alessandro ^{[1
,2
,3
,4
]}

Grosso, Giuseppe ^{[1
,2
]}

Parravicini, Giuseppe Pastori ^{[5
,6
]}

机构：

[1] INFM, CNR, NEST, I-56127 Pisa, Italy

[2] Univ Pisa, Dipartimento Fis E Fermi, I-56127 Pisa, Italy

[3] INFM, CNR, NEST, I-56126 Pisa, Italy

[4] Scuola Normale Super Pisa, I-56126 Pisa, Italy

[5] INFM, CNR, NEST, I-27100 Pavia, Italy

[6] Univ Pavia, Dipartimento Fis A Volta, I-27100 Pavia, Italy

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.77.115408

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electronic structure and the current profiles of n- and p-doped graphene ribbons are investigated within the Keldysh-Green's function method in the tight-binding framework. The low energy spectrum, at the heart of the relativisticlike quantum transport, is studied numerically and relevant features are understood analytically by means of the continued fraction tool. Simulations of charge transport and spatial distribution of spectral currents in field-effect controlled graphene ribbons are then carried out in the absence and in the presence of uniform magnetic fields. The role of gated regions and threading magnetic fields for manipulating the flow of Dirac particles is investigated.

引用

页数：9

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