论文标题
对相关电子的热电器的势能贡献
Potential energy contribution to the thermopower of correlated electrons
论文作者
论文摘要
某些类别的强度相关系统有望高供电效率高，但是缺乏对对Seebeck系数的相关效应的完全理解。这部分是由于Boltzmann型方法的局限性。一个人需要一个用于热电器的公式，该公式可以通过温度和热电器的温度和掺杂来单独研究动力学和势能贡献。在这里，我们通过为Hubbard样相互作用而得出了将电势与动能贡献区分开并促进对相关效应对Seebeck系数的效果的更好理解，从而解决了这一问题。例如，一频哈伯德模型的热电器是根据动态平均场计算得出的。对于中间和强相关极限的相互作用，动能和势能的贡献几乎取消。
Certain classes of strongly correlated systems promise high thermopower efficiency, but a full understanding of correlation effects on the Seebeck coefficient is lacking. This is partly due to limitations of Boltzmann-type approaches. One needs a formula for the thermopower that allows separate investigations of the kinetic and potential energy contributions to the evolution with temperature and doping of the thermopower. Here we address this issue by deriving for Hubbard-like interactions a formula for the thermopower that separates the potential from the kinetic energy contribution and facilitates a better understanding of correlation effects on the Seebeck coefficient. As an example, the thermopower of the one-band Hubbard model is calculated from dynamical mean-field. For interactions in both the intermediate and strong correlation limit, the contributions from kinetic and potential energy nearly cancel.
