Nuclear magnetic resonance in the heavy fermion superconductors

Abstract

Nuclear magnetic resonance has emerged as a vital technique for investigating strongly correlated electron systems, and is particularly important for studying superconductivity. In this paper the basic features of NMR as a technique for probing the superconducting state are reviewed. Topics include include spin relaxation processes, studies of vortex lattices, and phenomena associated with unconventional pairing symmetries. Recent experimental work is reviewed, with a particular emphasis on the heavy fermion superconductors.

arXiv comment51 pages, 20 figures

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• Homogeneous vs. inhomogeneous coexistence of magnetic order and superconductivity probed by NMR in Co and K doped iron pnictides
• Field Evolution of Coexisting Superconducting and Magnetic Orders in CeCoIn${}_5$
• Emergent Kondo scaling in iron-based superconductors AFe2As2 (A = K, Rb, Cs)
• Long range order and two-fluid behavior in heavy electron materials
• Spontaneous formation of a superconducting and antiferromagnetic hybrid state in SrFe2As2 under high pressure
• Emergent Weyl fermion excitations in TaP explored by 181-Ta quadrupole resonance
• Local structure and site occupancy of Cd and Hg substitutions in CeTIn5 (T=Co, Rh, Ir)
• Quasi-one-dimensional magnetism in the spin-$\frac{1}{2}$ antiferromagnet BaNa${}_2$Cu(VO${}_4$)${}_2$
• Universal Knight shift anomaly in the Periodic Anderson model
• Cooling Atomic Gases With Disorder
• Magnetic excitations in Kondo liquid: Superconductivity and Hidden Magnetic Quantum Critical Fluctuations
• Evolution of hyperfine parameters across a quantum critical point in CeRhIn${}_5$
• Field-Induced Switching of Ferro-Quadrupole Order Parameter in PrTi2Al20
• Magnetic Correlations in a Periodic Anderson Model with Non-Uniform Conduction Electron Coordination
• Spin Fluctuations and the Pseudogap in Organic Superconductors
• Quasi-2D magnetic correlations in Ni${}_2$P${}_2$S${}_6$ probed by ${}^{31}$P NMR
• Superconducting Orbital Magnetoelectric Effect and its Evolution across the Superconductivity Normal Metal Phase Transition
• Singlet ground state in the alternating spin-$1/2$ chain compound NaVOAsO${}_4$
• Pressure dependence of coherence-incoherence crossover behavior in KFe2As2 observed by resistivity and 75As-NMR/NQR
• Residual spin susceptibility in the spin-triplet, orbital-singlet model
• Pairing of weakly correlated electrons in the platinum-based centrosymmetric superconductor SrPt3P
• NMR in strongly correlated materials
• Coherence Temperature in the Diluted Periodic Anderson Model
• Electronic structure and spin-lattice relaxation in superconducting vortex states on the kagome lattice near van Hove filling
• Approaching itinerant magnetic quantum criticality through a Hund's coupling induced electronic crossover in the YFe${}_2$Ge${}_2$ superconductor
• Doping-dependent metal-insulator transition in a disordered Hubbard model
• An emerging global picture of heavy fermion physics
• Universal scaling in the Knight shift anomaly of doped periodic Anderson model
• Superconductivity of highly spin-polarized electrons in FeSe probed by ${}^{77}$Se NMR
• NMR investigation of the Knight shift anomaly in CeIrIn5 at high magnetic fields
• NMR Investigation of antiferromagnetism and coherence in URu${}_2$Si${}_{2-x}$P${}_x$
• Evidence for spin-triplet superconductivity in U${}_2$PtC${}_2$ from ${}^{195}$Pt NMR
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• Nuclear magnetic resonance investigation of the heavy fermion system Ce${}_2$CoAl${}_7$Ge${}_4$
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