Pressure dependence of the spin gap in BaVS3 - art. no. 081106

We carried out magnetotransport experiments under hydrostatic pressure in o rder to study the nature of the metal-insulator transition in BaVS3. Scalin g relations for rho (T,H,p) are established and the pressure dependence of the spin gap is determined. Our results, in conjunction with a reanalysis o f earlier specific-heat and susceptibility data, demonstrate that the trans ition is weakly second order. The nature of the phase diagram in the T-p-H space is discussed.