Magnetothermopower and Nernst effect in unconventional charge density waves

TL;DR

This paper theoretically investigates the thermoelectric power and Nernst effect in unconventional charge density waves, explaining recent experimental data and proposing the Nernst effect as a signature of UDW in certain materials.

Contribution

The study provides a theoretical analysis of thermoelectric and Nernst effects in UCDW, supporting experimental findings and identifying the Nernst effect as a diagnostic tool.

Findings

Theoretical results match recent magnetothermopower data in alpha-(BEDT-TTF)_2KHg(SCN)_4.

Nernst effect proposed as a clear signature of UDW.

Confirmation of LTP as UCDW in the studied material.

Abstract

Recently we have shown that the striking angular dependent magnetoresistance in the low temperature phase (LTP) of alpha-(BEDT-TTF)_2KHg(SCN)_4 is consistently described in terms of unconventional charge density wave (UCDW). Here we investigate theoretically the thermoelectric power and the Nernst effect in UDW. The present results account consistently for the recent data of magnetothermopower in alpha-(BEDT-TTF)_2KHg(SCN)_4 obtained by Choi et al. (Phys. Rev. B, 65, 205119 (2002)). This confirms further our identification of LTP in this salt as UCDW. We propose also that the Nernst effect provides a clear signature of UDW.