@article{oai:nagoya.repo.nii.ac.jp:00009523,
 author = {Mizubayashi, J. and Haruyama, J. and Takesue, I. and Okazaki, T. and Shinohara, H. and Harada, Y. and Awano, Y.},
 issue = {20},
 journal = {PHYSICAL REVIEW B},
 month = {May},
 note = {We report anomalous charging effect of single electrons (Coulomb diamonds) observed in carbon nanoscale peapod quantum dots that encapsulate a series of C60 molecules. We find that behaviors of diamonds are anomalously sensitive to back-gate voltages (V_bg), exhibiting two evidently different V_bg regions and a large polarity on V_bg. In particular, we find only a sequence of one large diamond followed by three smaller ones existing around ground state. Magnetic-field dependence indicates the presence of shell filling by spin singlet to doubly degenerate electronic levels for these. The encapsulated-C60 molecules indirectly affect this shell filling at low V_bg possibly via nearly free electrons. In contrast, they act as individual quantum dots coupled in series in high V_bg region. It directly contributes to highly overlapped very large diamonds. Moreover, we report power-law behaviors on conductance versus energy relationships observed in the same carbon nanoscale peapods. We find that the values of powers are also highly sensitive to applied V_bg with three different regions and anomalously high at high source-drain voltages. Because the power laws are found at voltages, which are the nearest outside of the above-mentioned fourfold Coulomb diamonds, correlation of the anomalous powers with orbital-related Tomonaga-Luttinger liquid is discussed.},
 pages = {205431--205431},
 title = {Anomalous Coulomb diamonds and power-law behavior sensitive to back-gate voltages in carbon nanoscale peapod quantum dots},
 volume = {75},
 year = {2007}
}