Manipulation of Spin Transport in Graphene by Surface Chemical Doping

被引：137

作者：

Pi, K. ^{[1
]}

Han, Wei ^{[1
]}

McCreary, K. M. ^{[1
]}

Swartz, A. G. ^{[1
]}

Li, Yan ^{[1
]}

Kawakami, R. K. ^{[1
]}

机构：

[1] Univ Calif Riverside, Dept Phys & Astron, Riverside, CA 92521 USA

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 18期

基金：

美国国家科学基金会;

关键词：

CHARGED-IMPURITY SCATTERING;

D O I：

10.1103/PhysRevLett.104.187201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The effects of surface chemical doping on spin transport in graphene are investigated by performing nonlocal measurements in ultrahigh vacuum while depositing gold adsorbates. We demonstrate manipulation of the gate-dependent nonlocal spin signal as a function of gold coverage. We discover that charged impurity scattering is not the dominant mechanism for spin relaxation in graphene, despite its importance for momentum scattering. Finally, unexpected enhancements of the spin lifetime illustrate the complex nature of spin relaxation in graphene.

引用

页数：4

共 30 条

[1] Theory of charged impurity scattering in two-dimensional graphene [J].

Adam, S. ;

Hwang, E. H. ;

Rossi, E. ;

Das Sarma, S. .

SOLID STATE COMMUNICATIONS, 2009, 149 (27-28) :1072-1079

[2] Screening effect and impurity scattering in monolayer graphene [J].

Ando, Tsuneya .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2006, 75 (07)

[3] Impurity-Induced Spin-Orbit Coupling in Graphene [J].

Castro Neto, A. H. ;

Guinea, F. .

PHYSICAL REVIEW LETTERS, 2009, 103 (02)

[4] First-principles study of metal adatom adsorption on graphene [J].

Chan, Kevin T. ;

Neaton, J. B. ;

Cohen, Marvin L. .

PHYSICAL REVIEW B, 2008, 77 (23)

[5] Charged-impurity scattering in graphene [J].

Chen, J. -H. ;

Jang, C. ;

Adam, S. ;

Fuhrer, M. S. ;

Williams, E. D. ;

Ishigami, M. .

NATURE PHYSICS, 2008, 4 (05) :377-381

[6] Gate-tunable graphene spin valve [J].

Cho, Sungjae ;

Chen, Yung-Fu ;

Fuhrer, Michael S. .

APPLIED PHYSICS LETTERS, 2007, 91 (12)

[7] Electron spin relaxation in graphene: The role of the substrate [J].

Ertler, Christian ;

Konschuh, Sergej ;

Gmitra, Martin ;

Fabian, Jaroslav .

PHYSICAL REVIEW B, 2009, 80 (04)

[8] One- and two-dimensional diffusion of metal atoms in graphene [J].

Gan, Yanjie ;

Sun, Litao ;

Banhart, Florian .

SMALL, 2008, 4 (05) :587-591

[9] Atomic Hole Doping of Graphene [J].

Gierz, Isabella ;

Riedl, Christian ;

Starke, Ulrich ;

Ast, Christian R. ;

Kern, Klaus .

NANO LETTERS, 2008, 8 (12) :4603-4607

[10] Electrical detection of spin precession in single layer graphene spin valves with transparent contacts [J].

Han, Wei ;

Pi, K. ;

Bao, W. ;

McCreary, K. M. ;

Li, Yan ;

Wang, W. H. ;

Lau, C. N. ;

Kawakami, R. K. .

APPLIED PHYSICS LETTERS, 2009, 94 (22)

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