Single-particle subband structure of Quantum Cables

Details Single-particle subband structure of Quantum Cables Single-particle subband structure of Quantum Cables

2001-04-24

arxiv.org/abs/cond-mat/0104461v1

Euro. Phys. J B17, (2000) 699

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages, 9 figures

Scientific paper

10.1007/s100510070111

We proposed a model of Quantum Cable in analogy to the recently synthesized coaxial nanocable structure [Suenaga et al. Science, 278, 653 (1997); Zhang et al. ibid, 281, 973 (1998)], and studied its single-electron subband structure. Our results show that the subband spectrum of Quantum Cable is different from either double-quantum-wire (DQW) structure in two-dimensional electron gas (2DEG) or single quantum cylinder. Besides the double degeneracy of subbands arisen from the non-abelian mirrow reflection symmetry, interesting quasicrossings (accidental degeneracies), anticrossings and bundlings of Quantum Cable energy subbands are observed for some structure parameters. In the extreme limit (barrier width tends to infinity), the normal degeneracy of subbands different from the DQW structure is independent on the other structure parameters.

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