期刊
PHYSICAL REVIEW B
卷 87, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.87.094504
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资金
- DOE [DE-FG02-05ER46236]
- Argonne National Laboratory, a U.S. Department of Energy Office of Science Laboratory [DE-AC02-06CH11357]
We reconsider the effect of disorder on the properties of a superconductor characterized by a sign-changing order parameter appropriate for Fe-based materials. Within a simple two-band model, we calculate simultaneously T-c, the change in residual resistivity Delta(rho 0), and the zero-energy density of states, and show how these results change for various types of gap structure and assumptions regarding the impurity scattering. The rate of T-c suppression is shown to vary dramatically according to details of the impurity model considered. We search therefore for a practical, experimentally oriented signature of a gap of the s(perpendicular to) type, and propose that observation of a particular evolution of the penetration depth, nuclear magnetic resonance relaxation rate, or thermal conductivity temperature dependence with disorder would suffice. DOI: 10.1103/PhysRevB.87.094504
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