一类弯曲量子线的量子束缚态

对电子在弯曲量子线中的弹道输运性质进行了理论研究.弯曲量子线由T型量子线和单曲量子线组成.该有限长的量子结构分别与两半无限长的量子通道相连，当施加一偏压时，量子通道分别可作为电子的发射极和收集极.计算结果表明，当入射电子的能量小于量子结构横向上的第一个本征模时，电导存在两个峰.进一步指出，这些峰来自于电子共振隧穿量子结构中的量子束缚态.并详尽地讨论了这些量子束缚态的性质.关键词：量子束缚态共振隧穿电导量子线

QUANTUM BOUND STATES OF ONE KIND OF BENT QUANTUM WIRES

The ballistic transport properties of electrons in bent quantum wires are studied. The bent quantum wire composed of T-typed and single-bent quantum wires has finite length and connects to two semi-infinite quantum channels, which serve as emitter and collector when a potential difference is applied. The numerical results show that the conductance have two peaks at the energy of electrons less than the eigenvalue of the first transverse mode. Furthermore, these peaks are due to the resonant tunneling via bound states in the quantum structure. The detailed studies of these quantum bound states are shown in the paper.