Lassagne B, Cleuziou J-P, Nanot S, Escoffier W, Avriller R, Roche S, Forró L, Raquet B, Broto J-M
Laboratoire National des Champs Magnétiques Pulsés, UMR5147, Toulouse, France.
Phys Rev Lett. 2007 Apr 27;98(17):176802. doi: 10.1103/PhysRevLett.98.176802. Epub 2007 Apr 24.
We report on magnetoconductance experiments in ballistic multiwalled carbon nanotubes threaded by magnetic fields as large as 55 T. In the high temperature regime (100 K), giant modulations of the conductance, mediated by the Fermi level location, are unveiled. The experimental data are consistently analyzed in terms of the field-dependent density of states of the external shell that modulates the injection properties at the electrode-nanotube interface, and the resulting linear conductance. This is the first unambiguous experimental evidence of Aharonov-Bohm effect in clean multiwalled carbon nanotubes.
我们报道了在高达55 T的磁场穿过的弹道多壁碳纳米管中的磁电导实验。在高温 regime（100 K）下，由费米能级位置介导的电导的巨大调制被揭示出来。根据调节电极 - 纳米管界面处注入特性的外壳的场依赖态密度以及由此产生的线性电导，对实验数据进行了一致的分析。这是在清洁多壁碳纳米管中阿哈罗诺夫 - 玻姆效应的首个明确实验证据。
