Numéro
J. Phys. I France
Volume 4, Numéro 10, October 1994
Page(s) 1539 - 1549
DOI https://doi.org/10.1051/jp1:1994205
DOI: 10.1051/jp1:1994205
J. Phys. I France 4 (1994) 1539-1549

Superconductivity and magnetic field induced spin density waves in the (TMTTF) 2X family

L. Balicas1, 2, K. Behnia1, 2, W. Kang1, 2, 3, E. Canadell4, P. Auban-Senzier1, D. Jérome1, 2, M. Ribault1, 2 and J. M. Fabre5

1  Laboratoire de Physique des Solides, Université Paris-Sud, 91405 Orsay, France
2  LCMI, CNRS-MPI, B.P. 166, 38042 Grenoble, France
3  Dept of Physics, Ewha Women's University, Seoul 120-750, South Korea
4  Laboratoire de Chimie Théorique, Université Paris-Sud, 91405 Orsay, France
5  Laboratoire de Chimie Organique et Structurale, Université Montpellier II, 34060 Montpellier, France


(Received 13 April 1994, revised 24 June 1994, accepted 28 June 1994)

Abstract
We report magnetotransport measurements in the quasi one dimensional (Q-1-D) organic conductor (TMTTF) 2Br at pressures up to 26 kbar, clown to 0.45 K in magnetic fields up to 19 T along the $c^{\ast}$ direction. It is found that a superconducting ground state is stabilized under 26 kbar at $T_{\rm C} = 0.8$ K. No magnetic field induced spin density wave (FISDW) transitions are observed below 19T unlike other Q-1-D superconductors pertaining to the selenium series. The computed amplitude of the interchain coupling along transverse directions is unable to explain the missing; FISDW instability.



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