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双层石墨烯位于1800—2150cm-1频率范围内的和频拉曼模
  • ISSN号：1000-3290
  • 期刊名称：《物理学报》
  • 时间：0
  • 分类：O657.37[理学—分析化学;理学—化学]
  • 作者机构：[1]中国科学院半导体研究所半导体超晶格国家重点实验室,北京100083, [2]河北半导体研究所专用集成电路重点实验室,石家庄050051
  • 相关基金：国家重点基础研究发展计划（批准号：2009CB929301）;国家自然科学基金（批准号：11225421,10934007）资助的课题
作者： 厉巧巧[1], 张昕[1], 吴江滨[1], 鲁妍[1], 谭平恒[1], 冯志红[2], 李佳[2], 蔚翠[2], 刘庆斌[2]
关键词： 石墨烯, 拉曼光谱, 双共振, 能量色散关系, graphene, Raman spectroscopy, double resonant scattering, laser-energy dispersion
中文摘要：

文章利用拉曼光谱研究了双层石墨烯在1800—2150 cm-1范围内的和频拉曼模.基于双共振拉曼散射理论,利用多波长激光拉曼散射结合声子色散曲线分别从实验上和理论上分析发现,双层石墨烯在此频率范围内主要存在4个拉曼模,它们主要由LO和LA或iTA按不同共振散射方式所组成的4个和频模,而iTO和oTO参与和频的可能性很小.文章澄清了学术界在1800—2150 cm-1频率范围内和频模的解释,有助于进一步深入理解多层石墨烯在此范围内的和频模.

英文摘要：

In this paper, Raman modes of bi-layer graphene are investigated in detail in the frequency region between 1800 and2150 cm-1. There are four dominant Raman modes in this frequency region. The frequencies of these modes dependent on excitation energy are revealed from the measurement with multi-wavelength lasers, which can be fully understood based on double resonance Raman scattering and the phonon dispersion relation of monolayer graphene. The results show that these Raman modes can be assigned to the combinational modes from the fundamental modes of iTA, LA and LO phonons, but not from iTO and oTO phonons as reported in the previous works. This study benefits us toward the full understanding of lattice dynamics of monolayer and multilayer graphenes.

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期刊信息
  • 《物理学报》
  • 北大核心期刊（2011版）
  • 主管单位:中国科学院
  • 主办单位:中国物理学会 中国科学院物理研究所
  • 主编：欧阳钟灿
  • 地址：北京603信箱(中国科学院物理研究所)
  • 邮编：100190
  • 邮箱：apsoffice@iphy.ac.cn
  • 电话：010-82649026
  • 国际标准刊号：ISSN：1000-3290
  • 国内统一刊号：ISSN：11-1958/O4
  • 邮发代号:2-425
  • 获奖情况:
  • 1999年首届国家期刊奖,2000年中科院优秀期刊特等奖,2001年科技期刊最高方阵队双高期刊居中国期刊第12位
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  • 被引量:49876