Pressure dependence of the spin gap in BaVS_3

Details Pressure dependence of the spin gap in BaVS_3 Pressure dependence of the spin gap in BaVS_3

2000-09-11

arxiv.org/abs/cond-mat/0009148v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 5 figures, submitted to PRB Rap. Com

Scientific paper

10.1103/PhysRevB.63.081106

We carried out magnetotransport experiments under hydrostatic pressure in order to study the nature of the metal-insulator transition in BaVS$_3$. Scaling relations for $\rho(T,H,p)$ are established and the pressure dependence of the spin gap is determined. Our new results, in conjunction with a re-analysis of earlier specific heat and susceptibility data, demonstrate that the transition is weakly second order. The nature of the phase diagram in the $T$--$p$--$H$ space is discussed.

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