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arXiv 0907.0344cond-mat.mtrl-sci
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用扫描隧道显微镜测量碳纳米管中的多体效应

Measuring many-body effects in carbon nanotubes with a scanning tunneling microscope

Hong Lin, Jérôme Lagoute, Vincent Repain, Cyril Chacon, Yann Girard, Jean-Sébastien Lauret, François Ducastelle, Annick Loiseau, Sylvie Rousset

摘要:

结合扫描隧道光谱和纳米管束中的光吸收,局部测量了碳纳米管中的电子-电子相互作用和激子。最大的间隙推导出在束的顶部的测量被发现是有关的内在准粒子的间隙。从光学跃迁的差异,我们推导出激子的结合能为0.4 eV的间隙和0.7 eV的第二范霍夫奇点。这为单壁碳纳米管上衬底诱导能隙重整化提供了第一个实验证据。

英文摘要:

Electron-electron interactions and excitons in carbon nanotubes are locally measured by combining Scanning tunneling spectroscopy and optical absorption in bundles of nanotubes. The largest gap deduced from measurements at the top of the bundle is found to be related to the intrinsic quasi-particle gap. From the difference with optical transitions, we deduced exciton binding energies of 0.4 eV for the gap and 0.7 eV for the second Van Hove singularity. This provides the first experimental evidence of substrate-induced gap renormalization on SWNTs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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