Thumbnail
Access Restriction
Open

Author Kohori, Y. ♦ Yamato, Y. ♦ Iwamoto, Y. ♦ Kohara, T. ♦ Bauer, E. D. ♦ Maple, M. B. ♦ Sarrao, J. L.
Sponsorship (US)
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Publisher The American Physical Society
Language English
Subject Keyword PHYSICS OF ELEMENTARY PARTICLES AND FIELDS ♦ ENERGY GAP ♦ FERMIONS ♦ INSTABILITY ♦ KNIGHT SHIFT ♦ NUCLEAR MAGNETIC RESONANCE ♦ NUCLEAR QUADRUPOLE RESONANCE ♦ PARITY ♦ SPIN ♦ SPIN-LATTICE RELAXATION ♦ SUPERCONDUCTIVITY ♦ SUPERCONDUCTORS
Abstract We have carried out {sup 115}In and {sup 59}Co nuclear quadrupole resonance and nuclear magnetic resonance measurements on CeCoIn{sub 5} and CeIrIn{sub 5}. The temperature T dependence of the nuclear spin-lattice relaxation rate 1/T{sub 1} of {sup 115}In in the normal state indicates that CeCoIn{sub 5} is located just at an antiferromagnetic instability, and CeIrIn{sub 5} is in the nearly antiferromagnetic region. In the superconducting state, 1/T{sub 1} has no Hebel-Slichter coherence peak just below T{sub C} and a power-law T dependence (close to T{sup 3}) at very low temperatures, which indicates the existence of line nodes in the superconducting energy gap. The {sup 115}In (Ce-In plane) Knight shift in CeCoIn{sub 5} decreases for both parallel and perpendicular directions to the tetragonal c axis in the superconducting state, which shows that the spin susceptibility decreases in all directions. These results indicate that CeCoIn{sub 5} and CeIrIn{sub 5} exhibit non-s-wave even parity (probably d-wave) superconductivity.
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 2001-10-01
Publisher Place United States
Journal Physical Review B
Volume Number 64
Issue Number 13


Open content in new tab

   Open content in new tab