While the phonon-drag effect can induce large Seebeck coefficients, it is associated with large mean free path phonons present in the vicinity of the maximum in temperature of the lattice thermal conductivity. In this paper, we initiate a new route by searching for the mutual drag between the electron and phonon-drag gases at the interface between two different media. In that respect, the temperature studies of the conductance and Seebeck coefficient of a model system consisting of an electrically conductive graphitic channel buried beneath the surface of a diamond crystal are shown. The observed behaviour is very similar to that of graphite, with a typical negative peak associated with the phonon-drag effect. Interestingly, this phonon-drag peak of the buried graphitic channel appears at a significantly higher temperature than that in pure graphite.

中文翻译：

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埋在金刚石中的石墨通道中的声子拖曳

虽然声子拖曳效应可以引起大的塞贝克系数，但它与存在于晶格热导率最高温度附近的大平均自由程声子相关。在本文中，我们通过寻找两种不同介质之间的界面处电子和声子拖曳气体之间的相互拖曳来开创一条新途径。在这方面，显示了由埋在金刚石晶体表面下方的导电石墨通道组成的模型系统的电导和塞贝克系数的温度研究。观察到的行为与石墨的行为非常相似，具有与声子拖曳效应相关的典型负峰。有趣的是，埋藏石墨通道的声子拖曳峰出现的温度明显高于纯石墨中的温度。