Phys. Rev. B 74, 140409(R) (2006) [4 pages]

Quasiparticle relaxation across the spin-density-wave gap in the itinerant antiferromagnet UNiGa₅

Abstract

References

Citing Articles (9)

Download: PDF (221 kB) Buy this article Export: BibTeX or EndNote (RIS)

Elbert E. M. Chia, Jian-Xin Zhu, H. J. Lee, Namjung Hur, N. O. Moreno^*, E. D. Bauer, T. Durakiewicz, R. D. Averitt, J. L. Sarrao, and A. J. Taylor
Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA

Received 11 July 2006; revised 3 October 2006; published 30 October 2006

Time-resolved photoinduced reflectivity is measured for the itinerant antiferromagnet UNiGa₅ (T_N≈85 K) from room temperature to 10 K. The relaxation time τ shows a sharp increase at T_N consistent with the opening of a spin-density-wave (SDW) gap. The temperature dependence of τ below T_N is also consistent with the opening of a SDW gap leading to a quasiparticle recombination bottleneck as revealed by the Rothwarf-Taylor model. This contrasts with canonical heavy fermions such as CeCoIn₅ where the recombination bottleneck arises from the hybridization gap.

URL:

http://link.aps.org/doi/10.1103/PhysRevB.74.140409

DOI:

10.1103/PhysRevB.74.140409

PACS:

75.50.Ee, 78.47.+p, 71.27+a

^*Permanent address: Department of Physics, Federal University of Sergipe, São Cristovão, SE49100-000, Brazil.

About | Terms and Conditions | Subscriptions | Search | Help

Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.

Citation Search:

Phys. Rev. B 74, 140409(R) (2006) [4 pages]

Quasiparticle relaxation across the spin-density-wave gap in the itinerant antiferromagnet UNiGa5

Quasiparticle relaxation across the spin-density-wave gap in the itinerant antiferromagnet UNiGa₅