论文标题
由于电子碰撞而引起的非局部反应的符号逆转
Sign reversal of nonlocal response due to electron collisions
论文作者
论文摘要
已知电子电子碰撞会在存在电流流动的情况下导致非局部电压下降。半光学理论预测，这一滴度与弹道式状态中电流的方向相反。我们使用微观方法，并表明该下降的符号可能取决于温度以及源和探针触点之间的距离。符号的变化对应于主要散射过程从正面碰撞到电子向后散射的变化。我们的结果与实验数据一致。
Electron-electron collisions are known to cause a nonlocal voltage drop in a presence of current flow. The semi-phenomenological theory predicts this drop to be opposite to the direction of the current in the ballistic regime. We use a microscopic approach and show that the sign of this drop may be of both signs depending on the temperature and the distance between the source and probe contacts. The change of sign corresponds to the change of the dominant scattering process from head-on collisions to backward scattering of electrons. Our results agree with the experimental data.
