Wilson ratio in Yb-substituted CeCoIn5 - Condensed Matter > Strongly Correlated ElectronsReportar como inadecuado




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Abstract: We have investigated the effect of Yb substitution on the Pauli limited,heavy fermion superconductor, CeCoIn$ 5$. Yb acts as a non-magnetic divalentsubstituent for Ce throughout the entire doping range, equivalent to holedoping on the rare earth site. We found that the upper critical field inCe,YbCoIn$ 5$ is Pauli limited, yet the reduced H,T phase diagram isinsensitive to disorder, as expected in the purely orbitally limited case. Weuse the Pauli limiting field, the superconducting condensation energy and theelectronic specific heat coefficient to determine the Wilson ratio $R {W}$,the ratio of the specific heat coefficient to the Pauli susceptibility inCeCoIn$ 5$. The method is applicable to any Pauli limited superconductor in theclean limit.



Autor: C. Capan, G. Seyfarth, D. Hurt, B. Prevost, S. Roorda, A. D. Bianchi, Z. Fisk

Fuente: https://arxiv.org/







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