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Mobility controlled linear magnetoresistance with 3D anisotropy in a layered graphene pallet
Zhang,Qiang1; Li,Peng1; He,Xin1; Li,Jun1; Wen,Yan1; Ren,Wencai2; Cheng,Hui-ming2; Yang,Yang3; Al-Hadeethi,Yas F4; Zhang,Xixiang1
2016-09-27
Source PublicationJournal of Physics D: Applied Physics
ISSN0022-3727
Volume49Issue:42
AbstractAbstract A bulk sample of pressed graphene sheets was prepared under hydraulic pressure (~150?MPa). The cross-section of the sample demonstrates a layered structure, which leads to 3D electrical transport properties with anisotropic mobility. The electrical transport properties of the sample were measured over a wide temperature (2–400?K) and magnetic field (?140?kOe?H?140?kOe) range. The magnetoresistance measured at a fixed temperature can be described by R(H,θ)=R(εθH,0) with εθ=(cos2θ+γ?2sin2θ)1/2, where γ is the mobility anisotropy constant and θ is the angle between the normal of the sample plane and the magnetic field. The large linear magnetoresistance (up to 36.9% at 400?K and 140 kOe) observed at high fields is ascribed to a classical magnetoresistance caused by mobility fluctuation (Δμ). The magnetoresistance value at 140 kOe was related to the average mobility (〈μ〉) because of the condition Δμ<〈μ〉. The carrier concentration remained constant and the temperature-dependent resistivity was proportional to the average mobility, as verified by Kohler’s rule. Anisotropic dephasing length was deduced from weak localization observed at low temperatures.
Keywordgraphene sheets 3D anisotropy linear magnetoresistance mobility fluctuation
DOI10.1088/0022-3727/49/42/425005
Language英语
WOS IDIOP:0022-3727-49-42-425005
PublisherIOP Publishing
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80482
Affiliation1.King Abdullah University of Science and Technology (KAUST), Physical Science and Engineering (PSE) Division, Thuwal 23955-6900, Saudi Arabia
2.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China
3.King Abdullah University of Science and Technology (KAUST), Imaging and Characterization Core Labs, Thuwal 23955-6900, Saudi Arabia
4.Department of Physics, King Abdulaziz University, Jeddah, Makkah 21589, Saudi Arabia
Recommended Citation
GB/T 7714
Zhang,Qiang,Li,Peng,He,Xin,et al. Mobility controlled linear magnetoresistance with 3D anisotropy in a layered graphene pallet[J]. Journal of Physics D: Applied Physics,2016,49(42).
APA Zhang,Qiang.,Li,Peng.,He,Xin.,Li,Jun.,Wen,Yan.,...&Zhang,Xixiang.(2016).Mobility controlled linear magnetoresistance with 3D anisotropy in a layered graphene pallet.Journal of Physics D: Applied Physics,49(42).
MLA Zhang,Qiang,et al."Mobility controlled linear magnetoresistance with 3D anisotropy in a layered graphene pallet".Journal of Physics D: Applied Physics 49.42(2016).
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