阶梯电压下量子环的动力学性质

物理学报

阶梯电压下量子环的动力学性质

郭延江, 熊永建. 2010: 阶梯电压下量子环的动力学性质, 物理学报, 59(1): 555-559.

引用本文:

郭延江, 熊永建. 2010: 阶梯电压下量子环的动力学性质, 物理学报, 59(1): 555-559.

Guo Yan-Jiang, Xiong Yong-Jian. 2010: Dynamical properties of quantum ring under the stepped pulse bias, Acta Physica Sinica, 59(1): 555-559.

Citation:

Guo Yan-Jiang, Xiong Yong-Jian. 2010: Dynamical properties of quantum ring under the stepped pulse bias, Acta Physica Sinica, 59(1): 555-559.

Dynamical properties of quantum ring under the stepped pulse bias

摘要: 利用非平衡格林函数方法,研究了一维量子环的动力学特性.量子环中通过恒定的磁通,并通过单根导线与电子库连接.考虑瞬时改变库的势(阶梯电压),导线与环间有含时的隧穿电流.提出一种数值方法计算有阶梯电压体系的电导,结果说明遂穿电流特性能够反映量子环中电子能谱结构.
- 量子环 /
- 遂穿电流 /
- 电子能谱
Abstract: The dynamical properties of a one-dimensional quantum ring with a constant magnetic flux are studied using the non-equilibrium Green's function method. The ring is coupled through a single lead to an electron reservoir, which is driven by a stepped pulse bias. We provide a numerical method to calculate current in the presence of stepped bias. Our results reveal the relation between the evolution of tunneling current and electron energy levels of the ring.