Redistribution of electronic charges in the spin-Peierls state in (TMTTF)2AsF6 observed by ^13C NMR
Abstract
We report he results of ^13C NMR for a quasi-one-dimensional quarter-filled organic material (TMTTF)2AsF6, which undergoes charge ordering (TCO = 102 K) and spin-Peierls phase transitions (TSP = 12 K). The ratio of two 1/T1 for the charge accepting and donating sites which grows from TCO finally saturates in approaching TSP, that indicates an opening of single gap for the spin excitation spectra. At TSP, however, doubly split NMR lines from inequivalently charged molecules merge originated from the variation in charge densities. This shows a rearrangement of the charge configuration in the spin-Peierls state.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2005
- Bibcode:
- 2005APS..MARH39003F