Low integer Landau level filling factors nu and indications for the fractional nu=1/2 in the 2D organic metal kappa-(BEDT-TTF)(2)I-3

摘要

In the two-dimensional (2D) organic metal kappa-(BEDT-TTF)(2)I-3 the low integer Landau level filling factors nu = 1-4 are observed under specific experimental conditions. In high magnetic fields even the presence of the fractional nu = 1/2 is strongly indicated in this multilayer material. These nu are detected by the chemical potential mu, i.e. a thermodynamic quantity, which could be probed under complex fermiological conditions. (C) 2005 Elsevier Ltd. All rights reserved.