Impurity scattering effects on the low-temperature specific heat of d-wave superconductors
C. F. Chang, J.-Y. Lin, H. D. Yang
DOI 10.1103/PhysRevB.61.14350 · Physical Review B
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Abstract
Recently, impurity scattering effects on quasiparticles in d-wave superconductors have attracted much attention. In particular, the thermodynamic properties in magnetic fields are of interest. We have measured the low-temperature specific heat C(T,H) of La1.78Sr0.22Cu1−xNixO4. The impurity scattering effects on C(T,H) of cuprate superconductors were clearly observed and are compared with the theory of d-wave superconductivity. It is found that impurity scattering leads to the relation γ(H)=γ(0)[1+D(H/Hc2)ln(Hc2/H)] in small magnetic fields. Surprisingly, the scaling of C(T,H) is broken down by impurity scattering.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La1.78Sr0.22CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 28.7 | Pressure not reported | midpoint |
| La1.78Sr0.22Cu0.99Ni0.01O4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 21.2 | Pressure not reported | midpoint |
| La1.78Sr0.22Cu0.98Ni0.02O4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 17.4 | Pressure not reported | midpoint |
| La1.78Sr0.22CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 28.7 | Pressure not reported | midpoint |
| La1.78Sr0.22Cu0.99Ni0.01O4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 21.2 | Pressure not reported | midpoint |
| La1.78Sr0.22Cu0.98Ni0.02O4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 17.4 | Pressure not reported | midpoint |
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