Spin-density wave ground state in the one-dimensional conductor (TMTSF) 2PF6: microscopic evidence from 77Se and 1H NMR experiments

A. Andrieux , D. Jérome , K. Bechgaard

The vanishing of the 77Se nuclear resonance signal and the broadening by internal magnetic fields of the proton resonance line establish the existence of spin-density waves in the low temperature semiconducting state of (TMTSF) 2PF6. The thermally activated collective mode of the commensurate spin-density wave contributes significantly to the proton spin-lattice relaxation. It is also suggested that the very small amplitude of the spin-density wave is due to the coexistence of two diverging channels in the conducting state : the SDW and Superconductivity channels.

Mots clés: nuclear magnetic resonance; nuclear spin lattice relaxation; one dimensional conductivity; organic compounds; proton magnetic resonance; spin density waves; one dimensional conductor; TMTSF sub 2 PF sub 6; sup 77 Se; sup 1 H; NMR; internal magnetic fields; low temperature; semiconducting state; thermally activated collective mode; proton spin lattice relaxation; spin density wave ground state; superconductivity channel

Domaines: Articles anciens

A. Andrieux, D. Jérome, K. Bechgaard. Spin-density wave ground state in the one-dimensional conductor (TMTSF) 2PF6: microscopic evidence from 77Se and 1H NMR experiments. Journal de Physique Lettres, 1981, 42 (4), pp.87-90. ⟨10.1051/jphyslet:0198100420408700⟩. ⟨jpa-00231880⟩