Division of Applied Physics, Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido, 060-8628, Japan.
J Phys Condens Matter. 2010 Jun 23;22(24):245302. doi: 10.1088/0953-8984/22/24/245302. Epub 2010 Jun 1.
A novel conductance oscillation in a twisted quantum ring composed of a helical atomic configuration is theoretically predicted. The internal torsion of the ring is found to cause a quantum phase shift in the wavefunction that describes the electron's motion along the ring. The resulting conductance oscillation is free from magnetic flux penetrating inside the ring, which is in complete contrast with the case for the ordinary Aharonov-Bohm effect observed in untwisted quantum rings.
理论预测了由螺旋原子结构组成的扭曲量子环中存在一种新的电导振荡。研究发现，环的内部扭转会导致描述电子沿环运动的波函数发生量子相移。由此产生的电导振荡与未扭转量子环中观察到的普通阿哈罗诺夫-玻姆效应完全相反，因为它不受穿过环内的磁通量的影响。
