Gate tunable Kondo effect in magnetic molecule decorated graphene

Yan, Baoming1,2; Li, Xinqi1,2; Zhao, Jiaji1,2; Jia, Zhenzhao1,2; Tang, Fangdong3; Zhang, Zhihong1,2; Yu, Dapeng1,2; Liu, Kaihui1,2; Zhang, Liyuan3; Wu, Xiaosong1,2

2018-09

10.1016/j.ssc.2018.05.001

SOLID STATE COMMUNICATIONS   影响因子和分区

0038-1098

1879-2766

The Kondo effect is one of the most widely studied many-body phenomena. Magnetic impurity decorated graphene is predicted to exhibit the Kondo effect with intriguing properties. Here we study the Kondo effect in Cobalt(II) phthalocyanine magnetic molecule decorated graphene by low temperature transport measurements. Spin-flip scattering and a logarithmic increase of resistance are observed, which confirms the Kondo effect. At a high carrier density, Kondo screening persists up to 20 K, suggesting a strong coupling between Dirac electrons and local magnetic moments of molecules. Decreasing the carrier concentration by a gate voltage results in a strong suppression of Kondo screening. Such tuning of Kondo screening can be used to turn on/off the local moment. Our results demonstrate a new Kondo system based on graphene. The significant gate tunability of the system may be used in spintronics.

Graphene with Cobalt(II) phthalocyanine molecule decoration Kondo effect Spin-flip scattering In situ deposition

SCI ; EI

英语

通讯

Shenzhen Peacock Program[KQTD2016022619565991]

Physics

Physics, Condensed Matter

WOS:000434300000005

PERGAMON-ELSEVIER SCIENCE LTD

20182105221427

Carrier concentration ; Cobalt compounds ; Graphene ; Kondo effect ; Magnetic moments ; Molecules ; Temperature

Thermodynamics:641.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Magnetism: Basic Concepts and Phenomena:701.2 ; Nanotechnology:761 ; Chemical Products Generally:804 ; Atomic and Molecular Physics:931.3

PHYSICS

Web of Science

1.Peking Univ, State Key Lab Artificial Microstruct & Mesoscop P, Beijing 100871, Peoples R China
2.Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China
3.Southern Univ Sci & Technol China, Dept Phys, Shenzhen 518055, Peoples R China

Yan, Baoming,Li, Xinqi,Zhao, Jiaji,et al. Gate tunable Kondo effect in magnetic molecule decorated graphene[J]. SOLID STATE COMMUNICATIONS,2018,278:24-30.

Yan, Baoming.,Li, Xinqi.,Zhao, Jiaji.,Jia, Zhenzhao.,Tang, Fangdong.,...&Wu, Xiaosong.(2018).Gate tunable Kondo effect in magnetic molecule decorated graphene.SOLID STATE COMMUNICATIONS,278,24-30.

Yan, Baoming,et al."Gate tunable Kondo effect in magnetic molecule decorated graphene".SOLID STATE COMMUNICATIONS 278(2018):24-30.