TY - JOUR
T1 - 75As and 139La NMR/NQR investigations of iron-based superconductor LaFeAs(O0.89F0.11)
AU - Nakai, Y.
AU - Kitagawa, S.
AU - Ishida, K.
AU - Kamihara, Y.
AU - Hirano, M.
AU - Hosono, H.
PY - 2009
Y1 - 2009
N2 - We report 75As and 139La NMR/NQR results in LaFeAs(O0.89F0.11). In the normal state, 1/T1T decreases with lowered temperature, which is reminiscent of the pseudogap behavior in the high-Tc cuprates. In the superconducting (SC) state, 1/T1 decreases suddenly below Tc without a Hebel-Slichter coherence peak, followed by a T3 dependence, which is characteristics of unconventional superconductors with lines of nodes. However, the residual density of states in the low temperatures, which is usually observed in unconventional superconductors with crystal imperfections and/or impurity phases, was not observed. Knight shift measurements show that spin susceptibility decreases in the SC state.
AB - We report 75As and 139La NMR/NQR results in LaFeAs(O0.89F0.11). In the normal state, 1/T1T decreases with lowered temperature, which is reminiscent of the pseudogap behavior in the high-Tc cuprates. In the superconducting (SC) state, 1/T1 decreases suddenly below Tc without a Hebel-Slichter coherence peak, followed by a T3 dependence, which is characteristics of unconventional superconductors with lines of nodes. However, the residual density of states in the low temperatures, which is usually observed in unconventional superconductors with crystal imperfections and/or impurity phases, was not observed. Knight shift measurements show that spin susceptibility decreases in the SC state.
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U2 - 10.1088/1742-6596/150/5/052179
DO - 10.1088/1742-6596/150/5/052179
M3 - Article
AN - SCOPUS:77952471538
SN - 1742-6588
VL - 150
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 5
M1 - 052179
ER -