Transport properties in CeOs$_{4}$Sb$_{12}$: Possibility of the ground state being semiconducting

Details Transport properties in CeOs$_{4}$Sb$_{12}$: Possibility of the ground state being semiconducting Transport properties in CeOs$_{4}$Sb$_{12}$: Possibility of the ground state being semiconducting

2004-12-22

arxiv.org/abs/cond-mat/0412601v2

Phys. Rev. B 71, 125127 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 6 figures

Scientific paper

10.1103/PhysRevB.71.125127

We have measured both magnetoresistance and Hall effect in CeOs$_4$Sb$_{12}$ to clarify the large resistivity state ascribed to the Kondo insulating one and the origin of the phase transition near 0.9 K reported in the specific heat measurement. We found unusual temperature ($T$) dependence both in the electrical resistivity $\rho\sim T^{-1/2}$ and the Hall coefficient $R_{\rm H}\sim T^{\rm -1}$ over the wide temperature range of about two order of magnitude below $\sim30$ K, which can be explained as a combined effect of the temperature dependences of carrier density and carrier scattering by spin fluctuation. An anomaly related with the phase transition has been clearly observed in the transport properties, from which the $H-T$ phase diagram is determined up to 14 T. Taking into account the small entropy change, the phase transition is most probably the spin density wave one. Both the electrical resistivity and Hall resistivity at 0.3 K is largely suppressed about an order of magnitude by magnetic fields above $\sim3$ T, suggesting a drastic change of electronic structure and a suppression of spin fluctuations under magnetic fields.

Affiliated with

Also associated with

No associations

Rating

Transport properties in CeOs$_{4}$Sb$_{12}$: Possibility of the ground state being semiconducting 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 Transport properties in CeOs$_{4}$Sb$_{12}$: Possibility of the ground state being semiconducting, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transport properties in CeOs$_{4}$Sb$_{12}$: Possibility of the ground state being semiconducting will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-542029