Angular dependent magnetothermopower of alpha-(ET)2KHg(SCN)4

Abstract

The magnetic field and angular dependencies of the thermopower and Nernst effect of the quasi-two-dimensional organic conductor alpha-(ET)2KHg(SCN)4 are experimentally measured at temperatures below (4 K) and above (9 K) the transition temperature to fields of In addition, a theoretical model which involves a magnetic breakdown effect between the q1D and q2D bands is proposed in order to simulate the data. Analysis of the background components of the thermopower and Nernst effect imply that at low temperatures, in the CDW state, the properties of alpha-(ET)2KHg(SCN)4 are determined mostly by the orbits on the new open Fermi sheets. Quantum oscillations observed in the both thermoelectric effects, at fields above 8 T, originate only from the alpha orbit.

25 pages, 18 figures

References in corpus (5)

• Giant Angular Dependent Nernst Effect in the Q1D Organic conductor (TMTSF)${}_2$PF${}_6$
• Magnetothemopower study of quasi two-dimensional organic conductor $\alpha$-(BEDT-TTF)${}_2$KHg(SCN)${}_4$
• Magnetothermopower and Nernst effect in unconventional charge density waves
• Resonant Nernst effect in the metallic and field-induced spin density wave states of (TMTSF)2ClO4
• The angular dependent magnetoresistance in alpha-(BEDT-TTF)_2KHg(SCN)_4