HIGH MAGNETIC-FIELD GROUND-STATE IN THE MOLECULAR CONDUCTOR ETA-MO4O11

The molecular conductor eta-Mo4O11 undergoes two successive charge den sity wave transitions at 109 K and 30 K, with corresponding changes in the electronic structure. The resulting low temperature Fermi surface has only very small closed orbits at the Fermi level, all of which re ach the quantum limit by 20 T. We report high field, low temperature m agnetoresistance studies in the low temperature state, including hydro static pressure dependence.