2009/12/10 by H. Saadaoui, W. A. MacFarlane, Z. Salman +13
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Lattice (music) #Magnetic and transport properties of perovskites and related materials #Magnetic field #Materials science #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Superconductivity #Superfluidity #Thermodynamics #Vortex #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.80.224503
published as Phys. Rev. B 80, 224503 (2009) · 10 pages, 6 figures
openalex publication_date 2009/12/10 · arxiv created 2010/03/05 · arxiv updated 2011/01/06 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
\ensuremathβ-detected NMR (\ensuremathβ-NMR) has been used to study vortex lattice disorder near the surface of the high-TC superconductor YBa2Cu3O_7\ensuremath-\ensuremathδ (YBCO). The magnetic-field distribution from the vortex lattice was detected by implanting a low-energy beam of highly polarized 8Li+ into a thin overlayer of silver on optimally doped, twinned, and detwinned YBCO samples. The resonance in Ag broadens significantly below the transition temperature TC as expected from the emerging field lines of the vortex lattice in YBCO. However, the lineshape is more symmetric and the dependence on the applied magnetic field is much weaker than expected from an ideal vortex lattice, indicating that the vortex density varies across the face of the sample, likely due to pinning at twin boundaries. At low temperatures the broadening from such disorder does not scale with the superfluid density.