| Autor: |
Dutoit CE; Aix-Marseille Université, CNRS, IM2NP (UMR 7334) , Marseille , France., Stepanov A; Aix-Marseille Université, CNRS, IM2NP (UMR 7334) , Marseille , France., van Tol J; National High Magnetic Field Laboratory , Florida State University , Tallahassee , Florida 32310 , United States., Orio M; Aix-Marseille Université, CNRS, Central Marseille, ISM2 , Marseille , France., Bertaina S; Aix-Marseille Université, CNRS, IM2NP (UMR 7334) , Marseille , France. |
| Abstrakt: |
We have investigated the charge ordering phase of the quasi-one-dimensional quantum antiferromagnet (TMTTF) 2 X (X = SbF 6 , AsF 6 , and PF 6 ) using high-fields/frequency electron paramagnetic resonance. In addition to the uniform displacement of the counteranions involved in the charge-order phase, we report the existence of a superlattice between the spin chains in the direction c, caused by the space modulation of the charge order. When the field is high enough, the magnetic decoupling of the spin chains allows us to estimate the interaction between the chains, J c < 1 mK, three orders of magnitude lower than expected from the mean field theory. |
