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Nuclear Spin Relaxation Rate of Disordered -wave Superconductors
Based on an effective Hamiltonian with the binary alloy disorder model
defined in the triangular lattice, the impurity scattering effects on the
density of states and especially on the spin-lattice relaxation rate of
-wave superconductors are studied by solving numerically the
Bogoliubov-de Gennes equations. In the clean limit, the coherence peak of
is observed as expected. More intriguingly, for strong scattering
potential, the temperature dependence of exhibits the two different
power law behaviors near and at low temperatures, respectively,
which is in good agreement with the nuclear quadrupolar resonance measurement.Comment: 4 pages, 3 figure
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