"布丁模"带驱动Na $_x$ CoO $_2$中的大热电势
"Pudding mold" band drives large thermopower in Na$_x$CoO$_2$
摘要：
在本研究中，我们确定了Na $_x$ CoO $_2$中大的热电势和大的电导率共存的原因。结果表明，不仅态密度（DOS）、有效质量和能带宽度，而且被称为"布丁模"型的$a_{1g}$带的特殊的{\it形状}（由分散部分和稍微平坦的部分组成）在该现象中起着重要作用。本研究为设计优良的热电材料提供了新的指导原则。
英文摘要：
In the present study, we pin down the origin of the coexistence of the large thermopower and the large conductivity in Na$_x$CoO$_2$. It is revealed that not just the density of states (DOS), the effective mass, nor the band width, but the peculiar {\it shape} of the $a_{1g}$ band referred to as the "pudding mold" type, which consists of a dispersive portion and a somewhat flat portion, is playing an important role in this phenomenon. The present study provides a new guiding principle for designing good thermoelectric materials.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
