Atomic-like behaviors and orbital-related Luttinger liquid in carbon nano-peapod quantum dots - Condensed Matter > Materials ScienceReport as inadecuate




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Abstract: We report influence of encapsulated C60 molecules on electron transport incarbon-nanotube peapod quantum dots. We find atomic-like behaviors with doublydegenerate electronic levels, which exist only around ground states, by singleelectron spectroscopy measured at low back-gate voltages Vbg. Correlationwith presence of nearly free electrons NFEs unique to the peapods isdiscussed. Moreover, we find anomalously high values of power a observed inpower laws in conductance versus energy relationships, which are stronglyassociated with the doubly degenerate levels. It is revealed that the powersoriginate from Tomonaga-Luttinger liquid via the occupied doubly degeneratelevels. Our observations clarify that the encapsulated C60 molecules formdoubly degenerate levels only at ground state in peapod quantum dots and do noteliminate a ballistic charge transport.



Author: J. Haruyama, J. Mizubayashi, I. Takesue, T. Okazaki, H. Shinohara, Y. Harada, Y. Awano

Source: https://arxiv.org/







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