论文标题
库仑在不同温度下在两个石墨烯层之间拖拉
Coulomb drag between two graphene layers at different temperatures
论文作者
论文摘要
从理论上讲，当层之间存在温度差时，我们从理论上研究石墨烯中的库仑阻力。在均等密度的退化极限内，我们发现这可能导致与阻力电阻率的通常二次温度依赖性相关。确切的行为在很大程度上取决于可用于内标散射的相空间，并且当层的温度互换时，这不是对称的。特别是，当一层的温度$ t $比另一层高得多时，阻力电阻率的行为为$ρ_d\ sim t/d^5 $，其中$ d $是层间分离。当活动层处于较高温度时，该极限中的阻力幅度总是更大。
We theoretically study the Coulomb drag in graphene when there is a temperature difference between the layers. Within the degenerate limit for equal layer densities, we find that this can lead to significant deviations from the usual quadratic temperature dependence of the drag resistivity. The exact behavior depends strongly on the phase space available for intraband scattering, and is not symmetrical when the temperatures of the layers are interchanged. In particular, when one layer is at a much higher temperature $T$ than the other, the drag resistivity behaves as $ρ_D\sim T/d^5$, where $d$ is the interlayer separation. The magnitude of the drag in this limit is always larger when the active layer is at the higher temperature.
