$^{77}$Se NMR investigation of the field-induced spin-density-wave transitions in (TMTSF)$_2$ClO$_4$

TL;DR

This study uses $^{77}$Se NMR and electrical transport measurements to explore the spin density wave transitions and electronic structure in (TMTSF)$_2$ClO$_4$ under high magnetic fields, revealing detailed phase behavior.

Contribution

It provides new insights into the spin density dynamics and phase transitions of (TMTSF)$_2$ClO$_4$ using combined NMR and transport techniques, especially in high magnetic fields.

Findings

Peaks in 1/T$_1$ occur at phase boundaries and subphase transitions.

NMR data reveals electronic structure in the quantum limit above 25 T.

Correlations between spin dynamics and FISDW subphases are established.

Abstract

Complementary $^{77}$Se nuclear magnetic resonance (NMR) and electrical transport have been used to correlate the spin density dynamics with the subphases of the field-induced spin density wave (FISDW) ground state in \tmt. We find that the peaks in the spin-lattice relaxation rate 1/T$_1$ appear within the metal-FISDW phase boundary and/or at first-order subphase transitions. In the quantum limit above 25 T, the NMR data gives an insight into the FISDW electronic structure.