H Aoki et al 2004 J. Phys.: Condens. Matter 16 L13 doi:10.1088/0953-8984/16/3/L02
Field-angle dependence of the zero-energy density of states in the unconventional heavy-fermion superconductor CeCoIn5
FREE ARTICLEH Aoki1, T Sakakibara1, H Shishido2, R Settai2, Y Ōnuki2, P Miranović3 and K Machida3
Show affiliationsLETTER TO THE EDITOR
Field-angle-dependent specific heat measurements have been made on the heavy-fermion superconductor CeCoIn5 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 dxy type.
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Issue 3 (28 January 2004)
Received 13 November 2003
Published 9 January 2004
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Field-angle dependence of the zero-energy density of states in the unconventional heavy-fermion superconductor CeCoIn5
H Aoki et al 2004 J. Phys.: Condens. Matter 16 L13
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