Scaling and Thermal Conductivity in Unconventional Superconductors: The Case of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>UPt</mi></mrow><mrow><mn>3</mn></mrow></msub></mrow></math></span>

H. Suderow; J. P. Brison; A. Huxley; J. Flouquet

doi:10.1103/PhysRevLett.80.165

Scaling and Thermal Conductivity in Unconventional Superconductors: The Case of ${UPt}_{3}$

H. Suderow, J. P. Brison, A. Huxley, and J. Flouquet

Phys. Rev. Lett. 80, 165 – Published 5 January 1998

Abstract

We present extensive measurements of the thermal conductivity κ of a high quality single crystal of the heavy fermion superconductor ${UPt}_{3}$ at low fields and very low temperatures (down to $16 mK$ ). Our $κ (B, T)$ data under magnetic fields scale as a function of a single parameter ${x = T / T}_{c} \sqrt{B_{c 2} / B}$ yielding to the first observation of the magnetic field-temperature scaling relations recently predicted for a superconductor with a line of zeros in the gap. Both the zero field and the mixed phase measurements of κ give now a consistent picture regarding the gap structure of ${UPt}_{3}$ .

Received 17 June 1997

DOI:https://doi.org/10.1103/PhysRevLett.80.165

Authors & Affiliations

H. Suderow¹, J. P. Brison², A. Huxley¹, and J. Flouquet¹

¹Commissariat à l'Energie Atomique, Département de Recherche Fondamentale sur la Matière Condensée, 17 rue des Martyrs, 38054 Grenoble Cedex 9, France
²Centre de Recherches sur les Très Basses Températures, CNRS, BP 166, 38042 Grenoble Cedex 9, France