Pairing symmetry and two-fluid behavior in the heavy fermion superconductor CeCoIn5
نویسنده
چکیده
منابع مشابه
Spectroscopic evidence for multiple order parameter components in the heavy fermion superconductor CeCoIn5.
Point-contact spectroscopy was performed on single crystals of the heavy-fermion superconductor CeCoIn(5) between 150 mK and 2.5 K. A pulsed measurement technique ensured minimal Joule heating over a wide voltage range. The spectra show Andreev-reflection characteristics with multiple structures which depend on junction impedance. Spectral analysis using the generalized Blonder-Tinkham-Klapwijk...
متن کاملControllable Rashba spin-orbit interaction in artificially engineered superlattices involving the heavy-fermion superconductor CeCoIn5.
By using a molecular beam epitaxy technique, we fabricate a new type of superconducting superlattices with controlled atomic layer thicknesses of alternating blocks between the heavy-fermion superconductor CeCoIn5, which exhibits a strong Pauli pair-breaking effect, and nonmagnetic metal YbCoIn5. The introduction of the thickness modulation of YbCoIn5 block layers breaks the inversion symmetry ...
متن کاملHexagonal and square flux line lattices in CeCoIn5.
Using small-angle neutron scattering, we have imaged the magnetic flux line lattice (FLL) in the d-wave heavy-fermion superconductor CeCoIn5. At low fields we find a hexagonal FLL. Around 0.6 T this undergoes what is most likely a first-order transition to square symmetry, with the nearest neighbors oriented along the gap node directions. This orientation of the square FLL is consistent with th...
متن کاملAnomalous NMR magnetic shifts in CeCoIn5
We report In and Co nuclear magnetic resonance ~NMR! measurements in the heavy fermion superconductor CeCoIn5 above and below Tc . The hyperfine couplings of the In and Co are anisotropic and exhibit dramatic changes below 50 K due to changes in the crystal field level populations of the Ce ions, suggesting localized f electrons. Below Tc the spin susceptibility is suppressed, indicating single...
متن کاملSuppressed Andreev Reflection at the Normal-Metal / Heavy-Fermion Superconductor CeCoIn5 Interface
In order to probe the order parameter symmetry of the heavy-fermion superconductor (HFS) CeCoIn5, we employ point-contact spectroscopy, where dynamic conductance spectra are taken from a nano-scale junction between a normal-metal (N) Au tip and a single crystal of CeCoIn5. The point-contact junction (PCJ) is formed on a single crystal surface with two crystallographic orientations, (001) and (1...
متن کامل