纳米管中的近藤物理：磁场依赖性与单重态-三重态近藤效应
介观与纳米尺度物理
2007-05-23 v2
摘要
在单壁碳纳米管中，我们观察到了自旋1/2近藤效应。自旋分辨近藤峰的能量在高场下与磁场成正比，这与近期的报道相反。在较低场下，该能量低于该线性依赖关系，这与理论预期定性一致。对于偶数电子占据，由于三重态基态的简并，我们观察到了自旋1近藤效应。在同一库仑菱形区内调节栅极电压，会驱动向单重态基态的转变。我们还利用磁场独立调节了单重态与三重态之间的能差。由此测得的塞曼分裂证实了从自旋1/2近藤特征中测得的g因子数值。
引用
@article{arxiv.0704.3641,
title = {Kondo Physics in Nanotubes: Magnetic-field dependence and singlet-triplet Kondo},
author = {C. H. L. Quay and John Cumings and Sara Gamble and R. de Picciotto and H. Kataura and D. Goldhaber-Gordon},
journal= {arXiv preprint arXiv:0704.3641},
year = {2007}
}
备注
10 pp., 5 fig. cond-mat/0606258 was split into two papers to clarify their separate stories. cond-mat/0606258v2 treats the effect of C60 intercalation on transport in nanotubes. 0704.3641 is on Kondo physics in a nanotube in B-field. We now note: the splitting of Kondo resonances with B-field is sub-linear at low field, in qualitative agreement with theories