Abstract
Using the merger of local-density approximation and dynamical mean-field theory, we show how electronic correlations increase the thermopower of by 200%. The newly revealed mechanism is an asymmetric shift of (quasi) electrons and holes away from the Fermi level, concurrent with an asymmetry of the respective (group) velocities. Exploiting this effect in band structure and correlation engineering may lead to a substantial increase in the thermoelectric figure of merit.
- Received 22 April 2010
DOI:https://doi.org/10.1103/PhysRevB.82.201106
©2010 American Physical Society