The electron transport modulated with phonon in graphene nanoribbons

Yue-Yang Liu; Bo-Lin Li; Shi-Zhang Chen; Ke-Qiu Chen

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The electron transport modulated with phonon in graphene nanoribbons

Yue-Yang Liu,Bo-Lin Li,Shi-Zhang Chen,Ke-Qiu Chen * #

School of Physics and Electronics, Hunan University, Changsha, 410082

*Correspondence author

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Funding: Natural Science Foundation of China（No.11674092, 11274105）, Specialized Research Fund for the Doctoral Program of Higher Education of China（No.20130161130004）

Opened online:16 May 2017

Accepted by: none

Citation: Yue-Yang Liu,Bo-Lin Li,Shi-Zhang Chen.The electron transport modulated with phonon in graphene nanoribbons[OL]. [16 May 2017] http://en.paper.edu.cn/en_releasepaper/content/4729361

We observe directly the lattice vibration and its multifold effect on electron/spin transport in zigzag graphene nanoribbons in simulation. Results show that the electron transport fluctuates greatly due to the incessant lattice vibration of the nanoribbons. More interestingly, the phonons behave like a double-edged sword that it boosts the conductance of symmetric zigzag nanoribbons (containing even number of zigzag chains along the width direction) while weakens the conductance of asymmetric nanoribbons. As a result, the spin filter effect that exists in perfect symmetric zigzag graphene nanoribbon is significantly weakened by phonons. Since phonons are usually inevitable in experiments, the research is very meaningful for guiding the realization of theoretical phenomena in experiments or explaining the mismatches between theoretical predictions and experimental results.

Keywords:Condensed matter physics; Electron-phonon interaction; Lattice vibration; Electron transport; Graphene nanoribbons

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