Eur. Phys. J. B 67, 43-49 (2009)
https://doi.org/10.1140/epjb/e2009-00006-x

High pressure study of the organic compound (TMTTF)₂BF₄

DPMC, University of Geneva, 24 quai Ernest-Ansermet, 1211 Genève 4, Switzerland

Corresponding author: ^a Anna-Sabina.Ruetschi@unige.ch

Received: 8 September 2008
Revised: 26 November 2008
Published online: 9 January 2009

Abstract

High pressure resistivity measurements of the organic compound (TMTTF)₂BF₄ have been performed in a newly developped Bridgman cell providing good pressure conditions on a wide pressure range. For the first time in this compound a zero resistance superconducting state is observed between 3 and 4 GPa. At temperatures above the superconducting transition, the resistivities of the two high quality samples show a different behavior. One sample, provides indications for a magnetic quantum critical point at the maximum of T_c, whereas in the other antiferromagnetic spin-fluctuations are present above T_c.