d-Wave Superconductivity in Antiferromagnetic Heavy-Fermion CompoundUPd2Al3–Evidence from27AlNMR/NQR Studies–

Tou, Hideki; Kitaoka, Y.; Asayama, Kunisuke; Geibel, C.; Schank, C.; Steglich, F.

doi:10.1143/jpsj.64.725

Cited by 94 publications

(83 citation statements)

References 11 publications

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“…In UPd 2 Al 3 , the coexistence of the AFM order with the superconductivity has been established by various measurements [37,39,40,41]. The Al-and Pd-NQR results showed that 1/T 1 decreases rapidly due to an opening gap at a part of the Fermi surface below T N and follows the 1/T 1 ∝ T 3 below T c , consistent with the line-node gap.…”

Section: The Af and Sc Phase Diagram In Cecu2si2mentioning

confidence: 61%

“…The Al-and Pd-NQR results showed that 1/T 1 decreases rapidly due to an opening gap at a part of the Fermi surface below T N and follows the 1/T 1 ∝ T 3 below T c , consistent with the line-node gap. [39,40] In UPd 2 Al 3 , note that an average occupation of 5f electrons per U atom is slightly less than three and larger than one in Ce HF systems [42]. With some relevance with this, nearly two localized 5f electrons are responsible for the AFM order with a relatively large spontaneous moment of 0.85µ B per U atom.…”

Section: The Af and Sc Phase Diagram In Cecu2si2mentioning

confidence: 96%

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Coexistence of antiferromagnetism and superconductivity in heavy-fermion systems

Kitaoka

Kawasaki

Mito

et al. 2002

Journal of Physics and Chemistry of Solids

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We report the novel pressure(P )−temperature(T ) phase diagrams of antiferromagnetism (AF) and superconductivity (SC) in CeRhIn5, CeIn3 and CeCu2Si2 revealed by the NQR measurement. In the itinerant helical magnet CeRhIn5, we found that the Néel temperature TN is reduced at P ≥ 1.23 GPa with an emergent pseudogap behavior. The coexistence of AF and SC is found in a narrow P range of 1.63 − 1.75 GPa, followed by the onset of SC with line-node gap over a wide P window 2.1 − 5 GPa. In CeIn3, the localized magnetic character is robust against the application of pressure up to P ∼ 1.9 GPa, beyond which the system evolves into an itinerant regime in which the resistive superconducting phase emerges. We discuss the relationship between the phase diagram and the magnetic fluctuations. In CeCu2Si2, the SC and AF coexist on a microscopic level once its lattice parameter is expanded. We remark that the underlying marginal antiferromagnetic state is due to collective magnetic excitations in the superconducting state in CeCu2Si2. An interplay between AF and SC is discussed on the SO(5) scenario that unifies AF and SC. We suggest that the SC and AF in CeCu2Si2 have a common mechanism.

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Section: The Af and Sc Phase Diagram In Cecu2si2mentioning

confidence: 61%

Section: The Af and Sc Phase Diagram In Cecu2si2mentioning

confidence: 96%

Coexistence of antiferromagnetism and superconductivity in heavy-fermion systems

Kitaoka

Kawasaki

Mito

et al. 2002

Journal of Physics and Chemistry of Solids

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“…It is not clear if the unusual sublinear behavior in the doped samples is related to the normal state relaxation or is part of a crossover to a constant at lower temperature. In a d-wave superconductor T ÿ1 1 T 3 in the clean limit, but impurity scattering can give rise to an enhanced spin-lattice relaxation that varies linearly with temperature for sufficiently low temperatures [8,[19][20][21][22][23][24]. In superconductors with coexisting antiferromagnetism, 146402-3 the low energy density of states is even more sensitive to the presence of impurity scattering [25].…”

Section: Prl 99 146402 (2007) P H Y S I C a L R E V I E W L E T T E mentioning

confidence: 99%

Interacting Antiferromagnetic Droplets in Quantum CriticalCeCoIn5

et al. 2007

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The heavy fermion superconductor CeCoIn 5 can be tuned between superconducting and antiferromagnetic ground states by hole doping with Cd. Nuclear magnetic resonance data indicate that these two orders coexist microscopically with an ordered moment 0:7 B . As the ground state evolves, there is no change in the low-frequency spin dynamics in the disordered state. These results suggest that the magnetism emerges locally in the vicinity of the Cd dopants.

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“…There are now several heavy fermion compounds showing clear experimental evidence of the microscopically homogeneous coexistence of AFM and SC correlations [3][4][5][6] . However, the direct consequences of the coexistence of AFM and SC has not yet been clearly resolved.…”

Section: Introductionmentioning

confidence: 99%

Nuclear spin-lattice relaxation rate in thed-wave superconducting state with coexisting antiferromagnetism

et al. 2004

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We consider a general D-wave superconducting gap function in the presence of coexisting antiferromagnetic (AFM) long-rang order. We find that the D-wave order parameter develops additional nodes without lowering the symmetry of the state due to the interplay of the superconducting and AFM correlations. This AFM correlated D-wave gap has a small gap structure inside the generic D-wave gap. As a result of this additional structure it shows a quite different response to impurities compared to a standard D-wave gap. We calculate the nuclear spin-lattice relaxation rate 1/T1 of this gap in the presence of impurities and discuss the implications for the experiments of some AFM heavy-fermion superconductors and in particular for CeRhIn5.

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d-Wave Superconductivity in Antiferromagnetic Heavy-Fermion CompoundUPd₂Al₃–Evidence from²⁷AlNMR/NQR Studies–

Cited by 94 publications

References 11 publications

Coexistence of antiferromagnetism and superconductivity in heavy-fermion systems

Coexistence of antiferromagnetism and superconductivity in heavy-fermion systems

Interacting Antiferromagnetic Droplets in Quantum CriticalCeCoIn5

Nuclear spin-lattice relaxation rate in thed-wave superconducting state with coexisting antiferromagnetism

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