Quasiparticle Relaxation Across a Spin Gap in the Itinerant Antiferromagnet UNiGa5

Details Quasiparticle Relaxation Across a Spin Gap in the Itinerant Antiferromagnet UNiGa5 Quasiparticle Relaxation Across a Spin Gap in the Itinerant Antiferromagnet UNiGa5

2006-05-09

arxiv.org/abs/cond-mat/0605240v1

Phys. Rev. B 74, 140409(R) (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 5 figures

Scientific paper

10.1103/PhysRevB.74.140409

Ultrafast time-resolved photoinduced reflectivity is measured for the itinerant antiferromagnet UNiGa$_{5}$ ($T_{N} \approx$85 K) from room temperature to 10 K. The relaxation time $\tau$ shows a sharp increase at $T_{N}$ consistent with the opening of a spin gap. In addition, the temperature dependence of $\tau$ below $T_{N}$ is consistent with the opening of a spin gap leading to a quasiparticle recombination bottleneck as revealed by the Rothwarf-Taylor model. This contrasts with canonical heavy fermions such as CeCoIn$_{5}$ where the recombination bottleneck arises from the hybridization gap.

Affiliated with

Also associated with

No associations

Rating

Quasiparticle Relaxation Across a Spin Gap in the Itinerant Antiferromagnet UNiGa5 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 Quasiparticle Relaxation Across a Spin Gap in the Itinerant Antiferromagnet UNiGa5, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quasiparticle Relaxation Across a Spin Gap in the Itinerant Antiferromagnet UNiGa5 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-675136