无序量子线中的非普适散粒噪声
Nonuniversal Shot Noise in Disordered Quantum Wires with Channel-Number Imbalance
摘要：
在普通量子线中，一个传播方向的导电通道数等于另一个传播方向的导电通道数。然而，它们在具有锯齿形边缘的石墨烯纳米带中可能不平衡。采用的模型系统，其中的通道数的不平衡程度可以控制，我们计算的散粒噪声功率在零频率使用玻尔兹曼-朗之万方法。普通扩散导体中的散粒噪声功率是泊松值的三分之一。我们发现，随着通道数的不平衡程度的增加，普遍的三分之一抑制故障和高度非普遍的行为出现的散粒噪声。
英文摘要：
The number of conducting channels for one propagating direction is equal to that for the other direction in ordinary quantum wires. However, they can be imbalanced in graphene nanoribbons with zigzag edges. Employing the model system in which a degree of channel-number imbalance can be controlled, we calculate the shot-noise power at zero frequency by using the Boltzmann-Langevin approach. The shot-noise power in an ordinary diffusive conductor is one-third of the Poisson value. We show that with increasing the degree of channel-number imbalance, the universal one-third suppression breaks down and a highly nonuniversal behavior of shot noise appears.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
