Negative correlation between charge carrier density and mobility fluctuations in graphene

Jianming Lu; Jie Pan; Sheng-Shiuan Yeh; Haijing Zhang; Yuan Zheng; Qihong Chen; Zhe Wang; Bing Zhang; Juhn-Jong Lin; Ping Sheng

doi:10.1103/PhysRevB.90.085434

Negative correlation between charge carrier density and mobility fluctuations in graphene

Jianming Lu, Jie Pan, Sheng-Shiuan Yeh, Haijing Zhang, Yuan Zheng, Qihong Chen, Zhe Wang, Bing Zhang, Juhn-Jong Lin, Ping Sheng

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

By carrying out simultaneous longitudinal and Hall measurements in graphene, we find that the 1/f noise for the charge carrier density is negatively correlated to that of mobility, with a governing behavior that differs significantly from the relation between their mean values. The correlation in the noise data can be quantitatively explained by a single-parameter theory whose underlying physics is the trapping and detrapping of the fluctuating charge carriers by the oppositely charged Coulomb scattering centers. This can alter the effective density of long-range scattering centers in a transient manner, with the consequent fluctuating effect on the mobility.

Original language	English
Article number	085434
Number of pages	9
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	90
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevB.90.085434
State	Published - 26 Aug 2014

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10.1103/PhysRevB.90.085434

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title = "Negative correlation between charge carrier density and mobility fluctuations in graphene",

abstract = "By carrying out simultaneous longitudinal and Hall measurements in graphene, we find that the 1/f noise for the charge carrier density is negatively correlated to that of mobility, with a governing behavior that differs significantly from the relation between their mean values. The correlation in the noise data can be quantitatively explained by a single-parameter theory whose underlying physics is the trapping and detrapping of the fluctuating charge carriers by the oppositely charged Coulomb scattering centers. This can alter the effective density of long-range scattering centers in a transient manner, with the consequent fluctuating effect on the mobility.",

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AU - Lu, Jianming

AU - Pan, Jie

AU - Yeh, Sheng-Shiuan

AU - Zhang, Haijing

AU - Zheng, Yuan

AU - Chen, Qihong

AU - Wang, Zhe

AU - Zhang, Bing

AU - Lin, Juhn-Jong

AU - Sheng, Ping

PY - 2014/8/26

Y1 - 2014/8/26

N2 - By carrying out simultaneous longitudinal and Hall measurements in graphene, we find that the 1/f noise for the charge carrier density is negatively correlated to that of mobility, with a governing behavior that differs significantly from the relation between their mean values. The correlation in the noise data can be quantitatively explained by a single-parameter theory whose underlying physics is the trapping and detrapping of the fluctuating charge carriers by the oppositely charged Coulomb scattering centers. This can alter the effective density of long-range scattering centers in a transient manner, with the consequent fluctuating effect on the mobility.

AB - By carrying out simultaneous longitudinal and Hall measurements in graphene, we find that the 1/f noise for the charge carrier density is negatively correlated to that of mobility, with a governing behavior that differs significantly from the relation between their mean values. The correlation in the noise data can be quantitatively explained by a single-parameter theory whose underlying physics is the trapping and detrapping of the fluctuating charge carriers by the oppositely charged Coulomb scattering centers. This can alter the effective density of long-range scattering centers in a transient manner, with the consequent fluctuating effect on the mobility.

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DO - 10.1103/PhysRevB.90.085434

M3 - Article

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VL - 90

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 8

M1 - 085434

ER -

Negative correlation between charge carrier density and mobility fluctuations in graphene

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