Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea.
Phys Rev Lett. 2013 May 31;110(22):226801. doi: 10.1103/PhysRevLett.110.226801. Epub 2013 May 29.
We report measurements of heat transport along the edge conducting channels in monolayer graphene in the integer quantum Hall regime. Hot charge carriers are injected to the edge channels, and the thermoelectric voltage is measured at a distance along the edge from the heat injection point. We confirm that heat transport in graphene in the quantum Hall regime is chiral and the thermoelectric signal is correlated with the charge conductance of ballistic transport, following the Mott relation. The thermoelectric signal decays with distance from the heater, indicating that carriers are partially thermalized during edge transmission.
我们报告了在整数量子霍尔效应 regime 中单层石墨烯边缘传导通道中热输运的测量结果。热载流子被注入到边缘通道，并且在沿边缘从热注入点的距离处测量热电电压。我们证实，在量子霍尔效应 regime 中石墨烯中的热输运是手性的，并且热电信号与弹道输运的电荷电导相关，遵循莫特关系。热电信号随距离加热器的衰减表明在边缘传输过程中载体部分热化。
