Grain boundary effect on the β -boron electrical transport properties at high pressure

Ming Li; Jie Yang; Karim Snoussi; Lixin Li; Huixin Wang; Chunxiao Gao

doi:10.1063/1.3505751

Grain boundary effect on the β -boron electrical transport properties at high pressure

Ming Li, Jie Yang, Karim Snoussi, Lixin Li, Huixin Wang, Chunxiao Gao

School of Medicine

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

7 Scopus citations

Abstract

Using a diamond anvil cell, the variable-frequency alternate current impedance spectrum of β -boron has been measured upon increasing the pressure from 3.2 to 27.5 GPa. The analysis has established that both the bulk resistance and the grain boundary resistance of β -boron smoothly decrease with the pressure, and that a remarkable phenomenon of discontinuity occurs at 23.9 GPa; this critical value has been interpreted as the pressure threshold above which the van der Waals forces and the interactions between the β -boron grain boundaries significantly emerge. Thence, the grain boundary contribution to the total resistance dramatically declines and results in an enhanced conduction. Besides, the β -boron sample impedance imaginary part exhibits a typical iron-core inductor frequency characteristic.

Original language	English (US)
Article number	174101
Journal	Applied Physics Letters
Volume	97
Issue number	17
DOIs	https://doi.org/10.1063/1.3505751
State	Published - Oct 25 2010

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3505751

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@article{af2d875169954d6e8ab7b7566c7271f3,

title = "Grain boundary effect on the β -boron electrical transport properties at high pressure",

abstract = "Using a diamond anvil cell, the variable-frequency alternate current impedance spectrum of β -boron has been measured upon increasing the pressure from 3.2 to 27.5 GPa. The analysis has established that both the bulk resistance and the grain boundary resistance of β -boron smoothly decrease with the pressure, and that a remarkable phenomenon of discontinuity occurs at 23.9 GPa; this critical value has been interpreted as the pressure threshold above which the van der Waals forces and the interactions between the β -boron grain boundaries significantly emerge. Thence, the grain boundary contribution to the total resistance dramatically declines and results in an enhanced conduction. Besides, the β -boron sample impedance imaginary part exhibits a typical iron-core inductor frequency characteristic.",

author = "Ming Li and Jie Yang and Karim Snoussi and Lixin Li and Huixin Wang and Chunxiao Gao",

note = "Funding Information: We are grateful to Honglei Wang for his critical reading of the manuscript. This work was supported by the National Natural Science Foundation of China (Grant Nos. 10874053, 10574055, 50802033, and 50532020), the National Basic Research Program of China (Grant No. 2005CB724404), the Science and Technology Research Project of Henan Province (Grant No. 092102210242), and the Research Fund for the Doctoral Program of Henan Polytechnic University (Grant No. 648229). ",

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doi = "10.1063/1.3505751",

language = "English (US)",

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journal = "Applied Physics Letters",

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T1 - Grain boundary effect on the β -boron electrical transport properties at high pressure

AU - Li, Ming

AU - Yang, Jie

AU - Snoussi, Karim

AU - Li, Lixin

AU - Wang, Huixin

AU - Gao, Chunxiao

N1 - Funding Information: We are grateful to Honglei Wang for his critical reading of the manuscript. This work was supported by the National Natural Science Foundation of China (Grant Nos. 10874053, 10574055, 50802033, and 50532020), the National Basic Research Program of China (Grant No. 2005CB724404), the Science and Technology Research Project of Henan Province (Grant No. 092102210242), and the Research Fund for the Doctoral Program of Henan Polytechnic University (Grant No. 648229).

PY - 2010/10/25

Y1 - 2010/10/25

N2 - Using a diamond anvil cell, the variable-frequency alternate current impedance spectrum of β -boron has been measured upon increasing the pressure from 3.2 to 27.5 GPa. The analysis has established that both the bulk resistance and the grain boundary resistance of β -boron smoothly decrease with the pressure, and that a remarkable phenomenon of discontinuity occurs at 23.9 GPa; this critical value has been interpreted as the pressure threshold above which the van der Waals forces and the interactions between the β -boron grain boundaries significantly emerge. Thence, the grain boundary contribution to the total resistance dramatically declines and results in an enhanced conduction. Besides, the β -boron sample impedance imaginary part exhibits a typical iron-core inductor frequency characteristic.

AB - Using a diamond anvil cell, the variable-frequency alternate current impedance spectrum of β -boron has been measured upon increasing the pressure from 3.2 to 27.5 GPa. The analysis has established that both the bulk resistance and the grain boundary resistance of β -boron smoothly decrease with the pressure, and that a remarkable phenomenon of discontinuity occurs at 23.9 GPa; this critical value has been interpreted as the pressure threshold above which the van der Waals forces and the interactions between the β -boron grain boundaries significantly emerge. Thence, the grain boundary contribution to the total resistance dramatically declines and results in an enhanced conduction. Besides, the β -boron sample impedance imaginary part exhibits a typical iron-core inductor frequency characteristic.

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JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 17

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ER -

Grain boundary effect on the β -boron electrical transport properties at high pressure

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