2005/04/30 by S. Ouazi, J. Bobroff, Julien Bobroff +9 · 2 citations
Engineering · Physics and Astronomy · #Condensed matter physics #Density of states #Electron #Fermi level #Impurity #Magnetic properties of thin films #Magnetism #Materials science #Nuclear magnetic resonance #Nuclear physics #Paramagnetism #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Superconducting Materials and Applications #Superconductivity #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.96.127005
published as Phys.Rev.Lett. 96, 127005 (2006) · 4 pages, 4 figures
openalex publication_date 2006/03/30 · arxiv created 2006/03/31 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
17O NMR is used to probe the local influence of nonmagnetic Zn and magnetic Ni impurities in the superconducting state of optimally doped high TC YBa2Cu3O7. Zn and Ni induce a staggered paramagnetic polarization, similar to that evidenced above TC, with a typical extension xi=3 cell units for Zn and xi>or=3 for Ni. In addition, Zn is observed to induce a local density of states near the Fermi energy in its neighborhood, which also decays over about 3 cell units. Its magnitude decreases sharply with increasing temperature. This allows direct comparison with the STM observations done in BiSCCO.