Field-induced spin density wave in (TMTSF)$_2$NO$_3$

David Vignolles (1) , Alain Audouard (1) , Marc Nardone (1) , Luc Brossard (1) , Sabrina Bouguessa (2) , Jean-Marc Fabre (2)

1 LNCMP - Laboratoire National des Champs Magnétiques Pulsés
2 HMM - Hétérochimie moléculaire et macromoléculaire

Interlayer magnetoresistance of the Bechgaard salt (TMTSF)$_2$NO$_3$ is investigated up to 50 teslas under pressures of a few kilobars. This compound, the Fermi surface of which is quasi two-dimensional at low temperature, is a semi metal under pressure. Nevertheless, a field-induced spin density wave is evidenced at 8.5 kbar above $\sim$ 20 T. This state is characterized by a drastically different spectrum of the quantum oscillations compared to the low pressure spin density wave state.

Domaines: Electrons fortement corrélés [cond-mat.str-el]

David Vignolles, Alain Audouard, Marc Nardone, Luc Brossard, Sabrina Bouguessa, et al.. Field-induced spin density wave in (TMTSF)$_2$NO$_3$. 2005. ⟨hal-00002384v3⟩