Odom T W, Huang J L, Cheung C L, Lieber C M
Department of Chemistry and Chemical Biology, and Division of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
Science. 2000 Nov 24;290(5496):1549-52. doi: 10.1126/science.290.5496.1549.
Single-walled carbon nanotubes are ideal systems for investigating fundamental properties and applications of one-dimensional electronic systems. The interaction of magnetic impurities with electrons confined in one dimension has been studied by spatially resolving the local electronic density of states of small cobalt clusters on metallic single-walled nanotubes with a low-temperature scanning tunneling microscope. Spectroscopic measurements performed on and near these clusters exhibit a narrow peak near the Fermi level that has been identified as a Kondo resonance. Using the scanning tunneling microscope to fabricate ultrasmall magnetic nanostructures consisting of small cobalt clusters on short nanotube pieces, spectroscopic studies of this quantum box structure exhibited features characteristic of the bulk Kondo resonance, but also new features due to finite size.
单壁碳纳米管是研究一维电子系统基本性质和应用的理想体系。利用低温扫描隧道显微镜对金属单壁纳米管上小钴团簇的局域电子态密度进行空间分辨，研究了磁性杂质与一维受限电子的相互作用。在这些团簇及其附近进行的光谱测量在费米能级附近呈现出一个窄峰，该峰已被确定为近藤共振。利用扫描隧道显微镜在短纳米管片段上制备由小钴团簇组成的超小磁性纳米结构，对这种量子盒结构的光谱研究显示出体近藤共振的特征，但也有由于有限尺寸而产生的新特征。
