Effect of impurities scattering potential on NMR relaxation rate in impure d-wave superconductors |
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Authors: | P Udomsamuthirun K Meemon |
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Institution: | aDepartment of Physics, Faculty of Science, Srinakharinwirot University, Bangkok 10110, Thailand;bThailand Center of Excellence in Physics, Huay Kaew Road, Chiang Mai 50200, Thailand |
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Abstract: | The purpose of our research is to study the nuclear spin lattice relaxation rate of impure d-wave superconductors. We use the Green’s function method to derive the approximation equation of density of states including the impurity scattering potential. We can get the analytic equation of the nuclear spin lattice relaxation rate that contained the impurity scattering potential in case of weak scattering potential and strong scattering potential in the simple form as the power series of Δ(T) and T. The numerical calculations show that there is coherence peak in the weak impurity scattering potential but there is no peak in the strong impurity scattering potential. |
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Keywords: | Impure d-wave superconductors Density of states The nuclear spin Lattice relaxation rate |
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