The angular dependent magnetoresistance in alpha-(BEDT-TTF)_2KHg(SCN)_4

TL;DR

This paper investigates the angular dependent magnetoresistance (ADMR) of the low temperature phase in alpha-(BEDT-TTF)_2KHg(SCN)_4, proposing that it is an unconventional charge density wave (UCDW) and demonstrating that the model explains existing data effectively.

Contribution

The study introduces a model assuming the low temperature phase is an unconventional charge density wave, explaining ADMR phenomena through quasiparticle spectrum quantization in magnetic fields.

Findings

Model accounts for many existing ADMR data.

Quasiparticle spectrum quantization explains ADMR features.

Supports UCDW as the nature of the low temperature phase.

Abstract

In spite of extensive experimental studies of the angular dependent magnetoresistance (ADMR) of the low temperature phase (LTP) of alpha-(BEDT-TTF)_2KHg(SCN)_4 about a decade ago, the nature of LTP remains elusive. Here we present a new study of ADMR of LTP in alpha-(ET)_2 salts assuming that LTP is unconventional charge density wave (UCDW). In the presence of magnetic field the quasiparticle spectrum in UCDW is quantized, which gives rise to striking ADMR in UCDW. The present model appears to account for many existing ADMR data of alpha-(BEDT-TTF)_2KHg(SCN)_4 remarkably well.