Quantum-coupled radial-breathing oscillations in double-walled carbon nanotubes

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	Quantum-coupled radial-breathing oscillations in double-walled carbon nanotubes
	Liu, KH ; Hong, XP ; Wu, MH ; Xiao, FJ ; Wang, WL ; Bai, XD ; Ager, JW ; Aloni, S ; Zettl, A ; Wang, EG ; Wang, F
刊名	NATURE COMMUNICATIONS
	2013
卷号	4
ISSN号	2041-1723
通讯作者	Wang, F (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
中文摘要	Van der Waals-coupled materials, ranging from multilayers of graphene and MoS2 to superlattices of nanoparticles, exhibit rich emerging behaviour owing to quantum coupling between individual nanoscale constituents. Double-walled carbon nanotubes provide a model system for studying such quantum coupling mediated by van derWaals interactions, because each constituent single-walled nanotube can have distinctly different physical structures and electronic properties. Here we systematically investigate quantum-coupled radial-breathing mode oscillations in chirality-defined double-walled nanotubes by combining simultaneous structural, electronic and vibrational characterizations on the same individual nanotubes. We show that these radial-breathing oscillations are collective modes characterized by concerted inner-and outer-wall motions, and determine quantitatively the tube-dependent van der Waals potential governing their vibration frequencies. We also observe strong quantum interference between Raman scattering from the inner-and outer-wall excitation pathways, the relative phase of which reveals chirality-dependent excited-state potential energy surface displacement in different nanotubes.
资助信息	NSF [0846648, DMR10-1006184]; NSF Centre for Integrated Nanomechanical Systems [EEC-0832819]; DOE [DE-AC02-05CH11231]; DOE Molecular Foundry [DE-AC02-05CH11231]; MOST [2012CB933003]; CAS [KJCX2-YW-M13, KJCX2-YW-W35]; NSF of China [11027402, 91021007, 10974238, 20973195]
语种	英语
公开日期	2014-01-16
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/57378]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Liu, KH,Hong, XP,Wu, MH,et al. Quantum-coupled radial-breathing oscillations in double-walled carbon nanotubes[J]. NATURE COMMUNICATIONS,2013,4.
APA	Liu, KH.,Hong, XP.,Wu, MH.,Xiao, FJ.,Wang, WL.,...&Wang, F.(2013).Quantum-coupled radial-breathing oscillations in double-walled carbon nanotubes.NATURE COMMUNICATIONS,4.
MLA	Liu, KH,et al."Quantum-coupled radial-breathing oscillations in double-walled carbon nanotubes".NATURE COMMUNICATIONS 4(2013).