Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2010-01-19
Physics
Condensed Matter
Strongly Correlated Electrons
3 pages, 3 figures, presented at QCNP2009, to appear in pssb
Scientific paper
In this work we report electron spin resonance (ESR) measurements in the semiconducting Ce1-xGdxFe4P12 (x ~ 0.001) filled skutterudite compounds. Investigation of the temperature (T) dependence of the ESR spectra and relaxation process suggests, that in the T-interval of 140-160 K, the onset of a "weak" metal-insulator (M-I) transition takes place due to the increasing density of thermally activated carriers across the semiconducting gap of ~ 1500 K. In addition, the observed low-T fine and hyperfine structures start to collapse at ~ 140 K and is completely absent for > 160 K. We claim that the increasing carrier density is able to trigger the rattling of the Gd3+ ions which in turn is responsible, via a motional narrowing mechanism, for the collapse of the ESR spectra.
Duque J. G. S.
Fisk Zach
García Antonio F.
Oseroff S. B.
Pagliuso P. G.
No associations
LandOfFree
Gd3+ rattling triggered by a "weak" M-I transition at 140-160 K in the Ce1-xGdxFe4$P12 x ~ 0.001 skutterudite compounds: an ESR study does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Gd3+ rattling triggered by a "weak" M-I transition at 140-160 K in the Ce1-xGdxFe4$P12 x ~ 0.001 skutterudite compounds: an ESR study, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gd3+ rattling triggered by a "weak" M-I transition at 140-160 K in the Ce1-xGdxFe4$P12 x ~ 0.001 skutterudite compounds: an ESR study will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-636734