Artificial atom and quantum terahertz response in carbon nanotube quantum dots

作者：Ishibashi K^*; Moriyama S; Fuse T; Kawano Y; Toyokawa S; Yamaguchi T

来源：Journal of Physics: Condensed Matter , 2008, 20(45): 454203.

DOI：10.1088/0953-8984/20/45/454203

Artificial atom behaviours have been observed in single-wall carbon nanotube (SWCNT) quantum dots (QDs). Two-electron shell structures and the Zeeman splitting of single-particle states were revealed in single-electron transport measurements in low temperatures. To demonstrate that the charging energy of the dot lies in a terahertz (THz) range, the THz photon-assisted tunnelling was tested, and was really observed as a satellite Coulomb peak. Some satellite peaks moved as a frequency was changed, but other peaks did not move. We give possible models to explain the existence of two different satellite peaks.

• 出版日期2008-11-12