On the low-energy excitations in superconducting YNi2B2C from B11 NMR relaxation around the critical field
A. Lascialfari, A. Rigamonti, I. Zucca
DOI 10.1103/PhysRevB.71.214510 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
B11 NMR spectra, spin-echo dephasing and spin-lattice relaxation measurements in a single crystal of superconducting YNi2B2C at two temperatures T⪡Tc(H=0), as a function of the external magnetic field H are reported, particularly for H close to the critical field Hc2. For H⪢Hc1 the spin lattice relaxation rate increases linearly with field, consistently with a density of states at the Fermi level going as H1∕2. It is pointed out how a relaxation process weighted average of the contributions from the intravortex and the intervortex regions also accounts for the field and the temperature dependences of the relaxation rate. For H≈Hc2 a small extra contribution, possibly related to novel excitations in the vortex cores or to the motion of the flux lines at the melting of the flux lattice, is detected. When the field-induced metallic state is attained (H>Hc2) the relaxation rate becomes field independent.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 15.3 | Pressure unresolved | unknown |
Similar papers
Structural, superconducting, and magnetic properties of YNi2B2C and ErNi2B2C
similarity 0.96C. Godart et al.
Source status unknown — claims are unverified
Superconducting energy gap and antiferromagnetic spin fluctuations in the superconductor YNi2B2C: An NMR study
similarity 0.96T. Kohara et al.
Source status unknown — claims are unverified
Observation of Electron-Phonon Interaction with Soft Phonons in Superconducting RNi2B2C
similarity 0.96I. K. Yanson et al.
Source status unknown — claims are unverified
NMR investigation of the quaternary-intermetallic-compound superconductor YNi2B2C
similarity 0.96M. E. Hanson et al.
Source status unknown — claims are unverified
Local structure of YNi2B2C superconductor determined by x-ray-absorption spectroscopy
similarity 0.96A. Yu. Ignatov et al.
Source status unknown — claims are unverified
Observation of an interplay between single-electron charging effects and superconductivity in YNi2B2C
similarity 0.96Eyal Bar-Sadeh & Oded Millo
Source status unknown — claims are unverified