TY - JOUR
T1 - Unconventional superconductivity and antiferromagnetic quantum critical behavior in the isovalent-doped BaFe2(As1-xP x)2
AU - Nakai, Y.
AU - Iye, T.
AU - Kitagawa, Shunsaku
AU - Ishida, K.
AU - Ikeda, H.
AU - Kasahara, S.
AU - Shishido, H.
AU - Shibauchi, T.
AU - Matsuda, Y.
AU - Terashima, T.
PY - 2010/9/2
Y1 - 2010/9/2
N2 - Spin dynamics evolution of BaFe2(As1-xP x)2 was probed as a function of P concentration via P31 NMR. Our NMR study reveals that two-dimensional antiferromagnetic (AF) fluctuations are notably enhanced with little change in static susceptibility on approaching the AF phase from the superconducting dome. Moreover, the magnetically ordered temperature θ deduced from the relaxation rate vanishes at optimal doping. These results provide clear-cut evidence for a quantum-critical point, suggesting that the AF fluctuations associated with the quantum-critical point play a central role in the high-Tc superconductivity.
AB - Spin dynamics evolution of BaFe2(As1-xP x)2 was probed as a function of P concentration via P31 NMR. Our NMR study reveals that two-dimensional antiferromagnetic (AF) fluctuations are notably enhanced with little change in static susceptibility on approaching the AF phase from the superconducting dome. Moreover, the magnetically ordered temperature θ deduced from the relaxation rate vanishes at optimal doping. These results provide clear-cut evidence for a quantum-critical point, suggesting that the AF fluctuations associated with the quantum-critical point play a central role in the high-Tc superconductivity.
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U2 - 10.1103/PhysRevLett.105.107003
DO - 10.1103/PhysRevLett.105.107003
M3 - Article
AN - SCOPUS:77956318144
SN - 0031-9007
VL - 105
JO - Physical Review Letters
JF - Physical Review Letters
IS - 10
M1 - 107003
ER -