Field-angle dependence of the zero-energy density of states in the unconventional heavy-fermion superconductor CeCoIn5

2003/11/30 by H. Aoki, Hideo Aoki, T. Sakakibara +9 · 3 citations
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Magnetic Properties of Alloys #Rare-earth and actinide compounds #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1088/0953-8984/16/3/l02

8 pages, 3 figures, to be published in J. Phys. Condens. Matter

arxiv created 2003/11/30 · openalex publication_date 2004/01/09 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30

Abstract

Field-angle-dependent specific heat measurements have been made on the heavy-fermion superconductor CeCoIn 5 down to , in a magnetic field rotating in the tetragonal c -plane. A clear fourfold angular oscillation is observed in the specific heat with the minima (maxima) occurring along the [100] ([110]) directions. Oscillation persists down to low fields , thus directly proving the existence of gap nodes. The results indicate that the superconducting gap symmetry is most probably of d xy type.

Citations

• Heavy-fermion superconductivity in CeCoIn5at 2.3 K
• Hexagonal and Square Flux Line Lattices inCeCoIn5
• Reentrant Vortex Lattice Transformation in Fourfold Symmetric Superconductors

Cited by

• Point-contact spectroscopy in heavy-fermion superconductors
• Anomalous quasiparticle transport in the superconducting state ofCeCoIn5
• Modulated vortex lattice in high fields and gap nodes