Influence of multi-cavity dislocation distribution on thermal conductance in graphene nanoribbons

Zhou Xin; Gao Ren-Bin; Tan Shi-Hua; Peng Xiao-Fang; Jiang Xiang-Tao; Bao Ben-Gang

doi:10.7498/aps.66.126302

Abstract

Using non-equilibrium Green's function method and keeping the zigzag carbon chains unchanged, we investigate the transmission rate of acoustic phonon and the reduced thermal conductance in the graphene nanoribbons with three cavities. The results show that the reduced thermal conductance approaches to 32kB2 T/(3h) in the limit T0 K. Due to the fact that only long wavelength acoustic phonons with zero cutoff frequency are excited at such low temperatures, the scattering influence on the long wavelength acoustic phonons by the dislocation distribution of three cavities in the graphene nanoribbons can be ignored and these phonons can go through the scattering region perfectly. As the temperature goes up, the reduced thermal conductance decreases. This is because the high-frequency phonons are excited and these high-frequency phonons are scattered easily by the scattering structures. With the further rise of temperature, acoustic phonon modes with the cutoff frequency greater than zero are excited, which leads to a rapid increase of the reduced thermal conductance. This study shows that in higher frequency region, the transmission spectra display complex peak-dip structures, which results from the fact that in higher frequency region, more phonon modes are excited and scattered in the middle scattering region with three cavities, and the scattering phonons are coupled with the incident phonons. When the three cavities are aligned perpendicularly to the edge of the graphene nanoribbons, the scattering from low-frequency phonons by the scattering structures is smallest, which leads to the fact that the reduced thermal conductance is largest at low temperatures; however, at high temperatures, the reduced thermal conductance is smallest when the three cavities is aligned perpendicularly to the edge of the graphene nanoribbons. This is because the scattering from high-frequency phonons by the scattering structures is biggest. These results show that the acoustic phonon transport and the reduced thermal conductance are dependent on the relative position of the three cavities. In addition, the dislocation distribution of the three cavities can only modulate obviously the high-temperature thermal conductance of the in-plane modes (IPMs). This is because the change of the relative position of the quantum dots can only modulate greatly the high-frequency phonon transmission rate and less modulate the low-frequency phonon transmission rate of the IPMs. However, the dislocation distribution of the three cavities can adjust obviously not only the high-temperature thermal conductance of the flexural phonon modes (FPMs), but also the low-temperature thermal conductance of the FPMs. This is because the change of the relative position of the three cavities can modulate greatly phonon transmission rates of flexural phonon modes in the low-frequency and high-frequency regions. These results provide an effective theoretical basis for designing the thermal transport quantum devices based on graphene nanoribbons.

Keywords:

Authors and contacts

1.
Institute of Mathematics and Physics, Central South University of Forestry and Technology, Changsha 410004, China;
2.
Institute of Computer and Information Engineering, Central South University of Forestry and Technology, Changsha 410004, China;
3.
Office of Academic Affairs, Hunan University of Science and Engineering, Yongzhou 425100, China

Corresponding author: Peng Xiao-Fang, xiaofangpeng11@163.com;xtjiang@csuft.edu.cn ; Jiang Xiang-Tao, xiaofangpeng11@163.com;xtjiang@csuft.edu.cn ;

Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 11247030, 61272147, 61602529), the Hunan Provincial Natural Science Foundation, China (Grant No. 14JJ4054), the Research Foundation of Hunan Provincial Education Department, China (Grant Nos. 12B136, 12C0446), the Talent Introducing Foundation of Central South University of Forestry and Technology, China (Grant No. 104-0160), and the Scientific Innovation Fund for Graduate of Central South University of Forestry and Technology, China (Grant No. CX2016B26).

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Cited By

[1]	Li X, Wang X, Zhang L, Lee S, Dai H 2008 Science 319 1229
[2]	Chen X B, Duan W H 2015 Acta Phys. Sin. 64 186302 (in Chinese) [陈晓彬, 段文晖 2015 64 186302]
[3]	Zhai X C, Qi F H, Xu Y F, Zhou X F, Jin G J 2015 Prog. Phys. 35 1 (in Chinese) [翟学超, 戚凤华, 许亚芳, 周兴飞, 金国钧 2015 物理学进展 35 1]
[4]	Castro Neto A H, Guinea F, Peres N M R, Novoselov K S, Geim A K 2009 Rev. Mod. Phys. 81 109
[5]	Lee C, Wei X, Kysar J W, Hone J 2008 Science 321 385
[6]	Du X, Skachko I, Barker A, Andrei E Y 2008 Nat. Nanotechnol. 3 491
[7]	Balandin A A 2011 Nat. Mater. 10 569
[8]	Peng X F, Wang X J, Gong Z Q, Chen K Q 2011 Appl. Phys. Lett. 99 233105
[9]	Peng X F, Zhou X, Tan S H, Wang X J, Chen K Q 2017 Carbon 113 334
[10]	Tan S H, Tang L M, Xie Z X, Pan C N, Chen K Q 2013 Carbon 65 181
[11]	Chen X K, Xie Z X, Zhou W X, Tang L M, Chen K Q 2016 Appl. Phys. Lett. 109 023101
[12]	Chen K Q, Li W X, Duan W, Shuai Z, Gu B L 2005 Phys. Rev. B 72 045422
[13]	Peng X F, Chen K Q, Wan Q, Zou B S, Duan W 2010 Phys. Rev. B 81 195317
[14]	Xu Y, Chen X, Wang J S, Gu B L, Duan W 2010 Phys. Rev. B 81 195425
[15]	Xu Y, Li Z, Duan W 2014 Small 10 2182
[16]	Xu W, Zhang G, Li B 2015 J. Chem. Phys. 143 154703
[17]	Xu Y, Tang P, Zhang S C 2015 Phys. Rev. B 92 081112
[18]	Peng X F, Chen K Q 2014 Carbon 77 360
[19]	Peng X F, Chen K Q 2016 Carbon 100 36
[20]	Yao H F, Xie Y E, Ou Y T, Chen Y P 2013 Acta Phys. Sin. 62 068102 (in Chinese) [姚海峰, 谢月娥, 欧阳滔, 陈元平 2013 62 068102]
[21]	Hua Y C, Cao B Y 2015 Acta Phys. Sin. 64 146501 (in Chinese) [华钰超, 曹炳阳 2015 64 146501]
[22]	Ouyang F P, Xu H, Li M J 2008 Acta Phys. Chim. Sin. 24 328 (in Chinese) [欧阳方平, 徐慧, 李明君 2008 物理化学学报 24 328]
[23]	Huang W Q, Huang G F, Wang L L, Huang B Y 2007 Phys. Rev. B 75 233415
[24]	Bao Z G, Chen Y P, Ouyang T, Yang K K, Zhong J X 2011 Acta Phys. Sin. 60 028103 (in Chinese) [鲍志刚, 陈元平, 欧阳滔, 杨凯科, 钟建新 2011 60 028103]
[25]	Morooka M, Yamamoto T, Watanabe K 2008 Phys. Rev. B 77 033412
[26]	Peng X F, Wang X J, Chen L Q, Chen K Q 2012 Europhys. Lett. 98 56001
[27]	Ouyang T, Chen Y, Xie Y 2010 Phys. Rev. B 82 245403
[28]	Yang N, Zhang G, Li B 2009 Appl. Phys. Lett. 95 033107
[29]	Liu X J, Zhang G, Zhang Y W 2016 Nano Lett. 16 4954
[30]	Sevincli H, Cuniberti G 2010 Phys. Rev. B 81 113401
[31]	Ouyang T, Chen Y, Xie Y, Stocks G M, Zhong J X 2011 Appl. Phys. Lett. 99 233101
[32]	Zhu T, Ertekin E 2014 Phys. Rev. B 90 195209
[33]	Ouyang T, Chen Y P, Yang K K, Zhong J X 2009 Europhys. Lett. 88 28002
[34]	Chen J, Zhang G, Li B 2013 Nanoscale 5 532
[35]	Chen J, Walther J H, Koumoutsakos P 2014 Nano Lett. 14 819
[36]	Peng X F, Xiong C, Wang X J, Chen L Q, Luo Y F, Li J B 2013 Comput. Mater. Sci. 77 440
[37]	Pan C N, Xie Z X, Tang L M, Chen K Q 2012 Appl. Phys. Lett. 101 103115
[38]	Zheng H, Liu H J, Tan X J, L H Y, Pan L, Shi J, Tang X F 2012 Appl. Phys. Lett. 100 093104
[39]	Huang W, Wang J S, Liang G 2011 Phys. Rev. B 84 045410
[40]	Hu J, Wang Y, Vallabhaneni A, Ruan X, Chen Y P 2011 Phys. Rev. B 99 113101
[41]	Xie Z X, Chen K Q, Duan W H 2011 J. Phys. -Condens. Matter 23 315302
[42]	Bretin M S, Malyshev A V, Orellana P A, Dominguez Adame F 2015 Phys. Rev. B 91 085431
[43]	Xu Y, Chen X, Gu B L, Duan W 2009 Appl. Phys. Lett. 95 233116

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Vol. 66, Issue 12 - 2017-06-20

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