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- W2068014917 abstract "75As-zero-field nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) measurements are performed on CaFe2As2 under pressure. At P = 4.7 and 10.8 kbar, the temperature dependences of nuclear-spin-lattice relaxation rate (1/T1) measured in the tetragonal phase show no coherence peak just below Tc(P) and decrease with decreasing temperature. The superconductivity is gapless at P = 4.7 kbar but evolves to that with multiple gaps at P = 10.8 kbar. We find that the superconductivity appears near a quantum critical point under pressures in the range 4.7 kbar < P < 10.8 kbar. Both electron correlation and superconductivity disappear in the collapsed tetragonal phase. A systematic study under pressure indicates that electron correlations play a vital role in forming Cooper pairs in this compound." @default.
- W2068014917 created "2016-06-24" @default.
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- W2068014917 date "2010-04-23" @default.
- W2068014917 modified "2023-09-24" @default.
- W2068014917 title "Pressure-induced unconventional superconductivity near a quantum critical point in CaFe<sub>2</sub>As<sub>2</sub>" @default.
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- W2068014917 doi "https://doi.org/10.1088/0953-2048/23/5/054004" @default.
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