TY - JOUR
T1 - Molecular pairing and fully gapped superconductivity in Yb-doped CeCoIn5
AU - Erten, Onur
AU - Flint, Rebecca
AU - Coleman, Piers
N1 - Publisher Copyright:
© 2015 American Physical Society.
PY - 2015/1/15
Y1 - 2015/1/15
N2 - The recent observation of fully gapped superconductivity in Yb doped CeCoIn5 poses a paradox, for the disappearance of nodes suggests that they are accidental, yet d-wave symmetry with protected nodes is well established by experiment. Here, we show that composite pairing provides a natural resolution: in this scenario, Yb doping drives a Lifshitz transition of the nodal Fermi surface, forming a fully gapped d-wave molecular superfluid of composite pairs. The T4 dependence of the penetration depth associated with the sound mode of this condensate is in accordance with observation.
AB - The recent observation of fully gapped superconductivity in Yb doped CeCoIn5 poses a paradox, for the disappearance of nodes suggests that they are accidental, yet d-wave symmetry with protected nodes is well established by experiment. Here, we show that composite pairing provides a natural resolution: in this scenario, Yb doping drives a Lifshitz transition of the nodal Fermi surface, forming a fully gapped d-wave molecular superfluid of composite pairs. The T4 dependence of the penetration depth associated with the sound mode of this condensate is in accordance with observation.
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U2 - 10.1103/PhysRevLett.114.027002
DO - 10.1103/PhysRevLett.114.027002
M3 - Article
AN - SCOPUS:84921695215
SN - 0031-9007
VL - 114
JO - Physical Review Letters
JF - Physical Review Letters
IS - 2
M1 - 027002
ER -