Enhanced thermoelectric coupling near electronic phase transition: The role of fluctuation Cooper pairs

Henni Ouerdane, Andrey A. Varlamov, Alexey V. Kavokin, Christophe Goupil, Cronin B. Vining

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


Thermoelectric energy conversion is a direct but low-efficiency process, which precludes the development of long-awaited wide-scale applications. As a breakthrough permitting a drastic performance increase is seemingly out of reach, we fully reconsider the problem of thermoelectric coupling enhancement. The cornerstone of our approach is the observation that heat engines are particularly efficient when their operation involves a phase transition of their working fluid. We derive and compute the thermoelastic coefficients of various systems, including Bose and Fermi gases, and fluctuation Cooper pairs. Combination of these coefficients yields the definition of the thermodynamic figure of merit, the divergence of which at finite temperature indicates that conditions are fulfilled for the best possible use of the thermoelectric working fluid. Here, this situation occurs in the fluctuation regime only, as a consequence of the increased compressibility of the working fluid near its phase transition. Our results and analysis clearly show that efforts in the field of thermoelectricity can now be productively directed towards systems where electronic phase transitions are possible.

Original languageEnglish
Article number100501
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number10
Publication statusPublished - 9 Mar 2015
Externally publishedYes


Dive into the research topics of 'Enhanced thermoelectric coupling near electronic phase transition: The role of fluctuation Cooper pairs'. Together they form a unique fingerprint.

Cite this