Ambipolar Nernst effect in NbSe$_2$
Romain Bel, Kamran Behnia, Helmut Berger
TL;DR
This study investigates the Nernst effect in NbSe$_2$, revealing a large quasi-particle contribution linked to charge density wave transition, offering insights into electron-hole dynamics and high-temperature superconductor behavior.
Contribution
It presents the first detailed analysis of the Nernst effect in NbSe$_2$, highlighting the role of electron-hole counterflow and scattering changes in the CDW state.
Findings
Large quasi-particle Nernst signal with opposite sign to vortex contribution
Charge density wave transition significantly alters electron scattering rates
Thermally-induced electron-hole counterflow explains the Nernst behavior
Abstract
The first study of Nernst effect in NbSe reveals a large quasi-particle contribution with a magnitude comparable and a sign opposite to the vortex signal. Comparing the effect of the Charge Density Wave(CDW) transition on Hall and Nernst coefficients, we argue that this large Nernst signal originates from the thermally-induced counterflow of electrons and holes and indicates a drastic change in the electron scattering rate in the CDW state. The results provide new input for the debate on the origin of the anomalous Nernst signal in high-T cuprates.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.