TY - JOUR
T1 - Microwave penetration depth and quasiparticle conductivity of PrFeAsO1-y single crystals
T2 - Evidence for a full-gap superconductor
AU - Hashimoto, K.
AU - Shibauchi, T.
AU - Kato, T.
AU - Ikada, K.
AU - Okazaki, R.
AU - Shishido, H.
AU - Ishikado, M.
AU - Kito, H.
AU - Iyo, A.
AU - Eisaki, H.
AU - Shamoto, S.
AU - Matsuda, Y.
PY - 2009/1/5
Y1 - 2009/1/5
N2 - In-plane microwave penetration depth λab and quasiparticle conductivity at 28 GHz are measured in underdoped single crystals of the Fe-based superconductor PrFeAsO1-y (Tc> 35K) by using a sensitive superconducting cavity resonator. λab(T) shows flat dependence at low temperatures, which is incompatible with the presence of nodes in the superconducting gap Δ(k). The temperature dependence of the superfluid density demonstrates that the gap is nonzero (Δ/kBT> 1.6) all over the Fermi surface. The microwave conductivity below Tc exhibits an enhancement larger than the coherence peak, reminiscent of high-Tc cuprate superconductors.
AB - In-plane microwave penetration depth λab and quasiparticle conductivity at 28 GHz are measured in underdoped single crystals of the Fe-based superconductor PrFeAsO1-y (Tc> 35K) by using a sensitive superconducting cavity resonator. λab(T) shows flat dependence at low temperatures, which is incompatible with the presence of nodes in the superconducting gap Δ(k). The temperature dependence of the superfluid density demonstrates that the gap is nonzero (Δ/kBT> 1.6) all over the Fermi surface. The microwave conductivity below Tc exhibits an enhancement larger than the coherence peak, reminiscent of high-Tc cuprate superconductors.
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U2 - 10.1103/PhysRevLett.102.017002
DO - 10.1103/PhysRevLett.102.017002
M3 - Article
AN - SCOPUS:58949090856
SN - 0031-9007
VL - 102
JO - Physical review letters
JF - Physical review letters
IS - 1
M1 - 017002
ER -