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arXiv 0806.0222cond-mat.mes-hall
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类石墨烯结构中的粒子-空穴霍尔效应

Particle-hole Hall effect in graphenelike structures

J. C. Martinez, M. B. A. Jalil, S. G. Tan

摘要:

我们发现,一个中等强度的恒定电场在平面上的单层石墨烯片可以创建粒子空穴对在一个可观察到的速率。对经历zitterbewegung在相反的方向,导致霍尔样分离的载流子和一个可测量的横向偶极矩被预测作为签名的zitterbewegung。与所产生的对相反,激发的零模式感生横向于电场的电流,但不导致分离的电荷。对于双层石墨烯,通过电场的类似效果被示出是不可能的。

英文摘要:

We show that a moderately strong constant electric field in the plane of a monolayer graphene sheet can create particle-hole pairs at an observable rate. The pairs undergo zitterbewegung in opposite directions leading to a Hall-like separation of the charge carriers and a measurable transverse dipole moment is predicted which serves as the signature of the zitterbewegung. In contrast with the created pairs, the zero modes of the excitation induce a current transverse to the electric field but do not result in separated charges. For bilayer graphene a similar effect by the electric field is shown not to be possible.

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