The angular-dependent magnetoresistance in α-(BEDT-TTF) ₂ KHg(SCN) ₄

Abstract

In spite of extensive experimental studies of the angular- dependent magnetoresistance (ADMR) of the low-temperature phase (LTP) of alpha-(BEDT-TTF)(2)KHg(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 quasi-particle 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)(2)KHg(SCN)(4) remarkably well.