2000/11/17 by Guang-Ming Zhang, Hui Hu, Lu Yu · 1 citation
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Rare-earth and actinide compounds #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.86.704
published as Physical Review Letters 86, 704 (2001) · 4 pages, 4 figures. To be published in Physical Review Letters
arxiv created 2000/11/17 · openalex publication_date 2001/01/22 · arxiv updated 2013/01/24 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We consider a model of an Anderson impurity embedded in a d(x(2)-y(2))--wave superconducting state to describe the low-energy excitations of cuprate superconductors doped with a small amount of magnetic impurities. Because of the Dirac-like energy dispersion, a sharp localized resonance above the Fermi energy, showing a marginal Fermi liquid behavior ( omega ln omega as omega-->0), is predicted for the impurity states. The same logarithmic dependence of self-energy and a linear frequency dependence of the relaxation rate are also derived for the conduction electrons, characterizing a new universality class for the strong coupling fixed point. At the resonant energies, the spatial distribution of the electron density of states around the magnetic impurity is also calculated.