Unconventional Superconductivity in CeIrIn5 and CeCoIn5: Specific Heat and Thermal Conductivity Studies

Phys. Rev. Lett. 86, 5152 – Published 28 May 2001
R. Movshovich, M. Jaime, J. D. Thompson, C. Petrovic, Z. Fisk, P. G. Pagliuso, and J. L. Sarrao

Abstract

Low temperature specific heat and thermal conductivity measurements on the ambient pressure heavy fermion superconductors CeIrIn5 and CeCoIn5 reveal power law temperature dependences of these quantities below Tc. The low temperature specific heat in both CeIrIn5 and CeCoIn5 includes T2 terms, consistent with the presence of nodes in the superconducting energy gap. The thermal conductivity data present a T-linear term consistent with the universal limit (CeIrIn5), and a low temperature T3 variation in the clean limit (CeCoIn5), also in accord with prediction for an unconventional superconductor with lines of nodes.

DOI: http://dx.doi.org/10.1103/PhysRevLett.86.5152

  • Received 15 November 2000
  • Revised 23 February 2001
  • Published in the issue dated 28 May 2001

© 2001 The American Physical Society

Authors & Affiliations

R. Movshovich1, M. Jaime1, J. D. Thompson1, C. Petrovic2, Z. Fisk2, P. G. Pagliuso1, and J. L. Sarrao1

  • 1Los Alamos National Laboratory, Los Alamos, New Mexico 87545
  • 2NHMFL, Florida State University, Tallahassee, Florida 32306

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