# Interplay between electron band-anticrossing and charge-density-wave instabilities

## TL;DR

This study investigates how the interaction between electron band-anticrossing and charge-density-wave instabilities influences electronic properties in rare-earth tritellurides, revealing hysteresis effects linked to their interplay.

## Contribution

It provides a detailed analysis of the competing effects of band crossing and CDW instabilities, with calculations matching experimental hysteresis observations.

## Key findings

- Hysteresis observed in Hall coefficient measurements.
- Interplay between band anticrossing and CDW causes the hysteresis.
- Susceptibility calculations explain the temperature range of hysteresis.

## Abstract

Our measurements of the Hall coefficient in rare-earth tritelluride compounds reveal a strong hysteresis between cooling and warming in the low temperature range where a second unidirectional charge density wave (CDW) occurs. We show that this effect results from the interplay between two instabilities: band crossing of the Te $p_{x}$ and $p_{y}$ orbitals at the Fermi level and CDW, which have a close energy gain and compete. Calculation of the electron susceptibility at the CDW wave vector with and without band anticrossing reconstruction of the electron spectrum yields a satisfactory estimation of the temperature range of the hysteresis in Hall effect measurements.