Stojetz Bernhard, Miko Csilla, Forró Laszlo, Strunk Christoph
Institute of Experimental and Applied Physics, University of Regensburg, 93040 Regensburg, Germany.
Phys Rev Lett. 2005 May 13;94(18):186802. doi: 10.1103/PhysRevLett.94.186802. Epub 2005 May 10.
We report conductance measurements on multiwall carbon nanotubes in a perpendicular magnetic field. A gate electrode with large capacitance is used to considerably vary the nanotube Fermi level. This enables us to search for signatures of the unique electronic band structure of the nanotubes in the regime of diffusive quantum transport. We find an unusual quenching of the magnetoconductance and the zero bias anomaly in the differential conductance at certain gate voltages, which can be linked to the onset of quasi-one-dimensional subbands.
我们报告了在垂直磁场中对多壁碳纳米管进行的电导测量。使用具有大电容的栅电极来显著改变纳米管的费米能级。这使我们能够在扩散量子输运 regime 中寻找纳米管独特电子能带结构的特征。我们发现在某些栅极电压下，磁电导出现异常猝灭，微分电导出现零偏置异常，这可能与准一维子带的出现有关。
