Phys. Rev. B 69, 060504(R) (2004) [4 pages]

Very-low-temperature tunneling spectroscopy in the heavy-fermion superconductor PrOs₄Sb₁₂

Abstract

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H. Suderow¹, S. Vieira¹, J. D. Strand², S. Bud’ko², and P. C. Canfield²
¹Laboratorio de Bajas Temperaturas, Departamento de Física de la Materia Condensada, Instituto de Ciencia de Materiales Nicolás Cabrera, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049 Madrid, Spain
²Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA

Received 22 December 2003; published 27 February 2004

We present scanning tunneling spectroscopy measurements on the heavy-fermion superconductor PrOs₄Sb₁₂. Our results show that the superconducting gap opens over a large part of the Fermi surface. The deviations from isotropic BCS s-wave behavior are discussed in terms of a finite distribution of values of the superconducting gap.

URL:

http://link.aps.org/doi/10.1103/PhysRevB.69.060504

DOI:

10.1103/PhysRevB.69.060504

PACS:

74.70.Tx, 07.79.Cz, 74.50.+r

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Phys. Rev. B 69, 060504(R) (2004) [4 pages]

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Very-low-temperature tunneling spectroscopy in the heavy-fermion superconductor PrOs₄Sb₁₂