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B NMR relaxation in superconductors: YRuB2 and LuRuB2 |
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| Authors: | Y. Kishimoto Y. Kawasaki Y. Ideta G. Ghosh L.C. Gupta |
| Affiliation: | a Department of Quantum Materials Science, University of Tokushima, 2-1 Minami-josanjima, Tokushima 770-8506, Japan b UGC-DAE Consortium for Scientific Research, Mumbai Centre, B.A.R.C, Trombay, Mumbai 400085, India c Bhabha Atomic Research Centre, Mumbai 400085, India d Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Strasse 38, D 01187 Dresden, Germany |
| Abstract: | To investigate the electronic states in YRuB2 and LuRuB2, we have carried out 11B NMR measurements. In the normal state, the spin-lattice relaxation rates 1/T1's in these compounds are proportional to the temperature T. 1/T1's show a small coherence peak just below the superconducting transition temperature Tc and decrease exponentially well below Tc. YRuB2 and LuRuB2 are found to be BCS superconductors with the energy gap 2Δ(0)=3.52 kBTc. |
| Keywords: | A. Superconductors D. Nuclear magnetic resonance D. Superconductivity |
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