中国物理学会期刊网
Chin.Phys.B  2017, Vol.26 Issue (11): 118103  DOI:10.1088/1674-1056/26/11/118103
An easy way to controllably synthesize one-dimensional SmB6 topological insulator nanostructures and exploration of their field emission applications
State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China

Abstract

A convenient fabrication technique for samarium hexaboride (SmB6) nanostructures (nanowires and nanopencils) is developed, combining magnetron-sputtering and chemical vapor deposition. Both nanostructures are proven to be single crystals with cubic structure, and they both grow along the[001] direction. Formation of both nanostructures is attributed to the vapor-liquid-solid (VLS) mechanism, and the content of boron vapor is proposed to be the reason for their different morphologies at various evaporation distances. Field emission (FE) measurements show that the maximum current density of both the as-grown nanowires and nanopencils can be several hundred μA/cm2, and their FN plots deviate only slightly from a straight line. Moreover, we prefer the generalized Schottky-Nordheim (SN) model to comprehend the difference in FE properties between the nanowires and nanopencils. The results reveal that the nonlinearity of FN plots is attributable to the effect of image potential on the FE process, which is almost independent of the morphology of the nanostructures. All the research results suggest that the SmB6 nanostructures would have a more promising future in the FE area if their surface oxide layer was eliminated in advance.
收稿日期:2017-08-07

基金资助

Project supported by the National Key Basic Research Program of China (Grant No. 2013CB933601), National Project for the Development of Key Scientific Apparatus of China (Grant No. 2013YQ12034506), the Fundamental Research Funds for the Central Universities of China, the Science and Technology Department of Guangdong Province, China, the Education Department of Guangdong Province, China, and the Natural Science Foundation of Guangdong Province, China (Grant No. 2016A030313313).

引用本文

[英文]
Xun Yang, Hai-Bo Gan, Yan Tian, Ning-Sheng Xu, Shao-Zhi Deng, Jun Chen, Huanjun Chen, Shi-Dong Liang, Fei Liu. An easy way to controllably synthesize one-dimensional SmB6 topological insulator nanostructures and exploration of their field emission applications[J]. Chin. Phys. B, 2017, 26(11): 118103.
[1]
Liu F, Su Z, Mo F, Li L, Chen Z, Liu Q, Chen J, Deng S and Xu N 2011 Nanoscale 3 610
[2]
Liu F, Tian J, Bao L, Yang T, Shen C, Lai X, Xiao Z, Xie W, Deng S and Chen J 2008 Adv. Mater. 20 2609
[3]
Shen Y, Xu N, Deng S, Zhang Y, Liu F and Chen J 2014 Nanoscale 6 4659
[4]
Xu J, Hou G, Li H, Zhai T, Dong B, Yan H, Wang Y, Yu B, Bando Y and Golberg D 2013 NPG Asia Mater. 5 e53
[5]
Zhang Z, Song X, Chen Y, She J, Deng S, Xu N and Chen J 2017 J. Alloys Compd. 690 304
[6]
Wu D, Cheng H, Zheng X, Wang X, Wang D and Li J 2015 Chin. Phys. Lett. 32 108102
[7]
Li J, Gao Z, Xue X, Li H, Deng J, Cui B and Zou D 2016 Acta Phys. Sin. 65 118104(in Chinese)
[8]
Shen Z, Chen C, Wang R, Wang B and Yan H 2016 Acta Phys. Sin. 65 236803(in Chinese)
[9]
Hatnean M C, Lees M R, Paul D M and Balakrishnan G 2013 Sci. Rep. 3 3071
[10]
Kim D J, Xia J and Fisk Z 2014 Nat. Mater. 13 466
[11]
Lu F, Zhao J, Weng H, Fang Z and Dai X 2013 Phys. Rev. Lett. 110 096401
[12]
Xu J, Zhao Y, Shi Z, Zou C and Ding Q 2008 J. Cryst. Growth. 310 3443
[13]
Brewer J R, Jacobberger R M, Diercks D R and Cheung C L 2011 Chem. Mater. 23 2606
[14]
Berchmans L J, Visuvasam A, Angappan S, Subramanian C and Suri A 2010 Ionics 16 833
[15]
Ji X, Zhang Q, Xu J and Zhao Y 2011 Prog. Solid State Chem. 39 51
[16]
Nickerson J, White R, Lee K, Bachmann R, Geballe T and Hull Jr G 1971 Phys. Rev. B 3 2030
[17]
Xu J, Zhao Y, Ji X, Zhang Q and Lau S 2009 J. Phys. D:Appl. Phys. 42 135403
[18]
Liu F, Gan H, Tang DM, Cao Y, Mo X, Chen J, Deng S, Xu N, Golberg D and Bando Y 2014 Small 10 685
[19]
Liu F, Tang D M, Gan H, Mo X, Chen J, Deng S, Xu N, Bando Y and Golberg D 2013 ACS Nano 7 10112
[20]
Wagner R and Ellis W 1964 Appl. Phys. Lett. 4 89
[21]
Gan H, Peng L, Yang X, Tian Y, Xu N, Chen J, Liu F and Deng S 2017 RSC Adv. 7 24848
[22]
Brewer J R, Deo N, Morris W Y and Cheung C L 2007 Chem. Mater. 19 6379
[23]
Ye Z, Huang J, Xu W, Zhou J and Wang Z 2007 Solid State Commun. 141 464
[24]
Ogita N, Nagai S, Udagawa M, Iga F, Sera M, Oguchi T, Akimitsu J and Kunii S 2005 Phys. B 359 941
[25]
Mörke I, Dvorak V and Wachter P 1981 Solid State Commun. 40 331
[26]
Ogita N, Nagai S, Okamoto N, Udagawa M, Iga F, Sera M, Akimitsu J and Kunii S 2003 Phys. Rev. B 68 224305
[27]
Yang X, Gan H B, Tian Y, Peng L X, Xu N S, Chen H J, Chen J, Deng S Z, Liang S D and Liu F 2017 unpublished
数据正在加载中...
中国物理学会期刊网