2003/09/12 by K. V. Samokhin
Materials Science · Mathematics · Physics and Astronomy · #Atomic physics #Condensed matter physics #Field (mathematics) #Geometry #Impurity #Iron-based superconductors research #Magnetic field #Mathematics #Orientation (vector space) #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Quantum tunnelling #Quasiparticle #Rare-earth and actinide compounds #Superconductivity #Zero (linguistics) #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.68.104509
published as Phys. Rev. B 68, 104509 (2003)
openalex publication_date 2003/09/12 · arxiv created 2003/09/15 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study the quasiparticle resonance states near strong impurities in the mixed state of a d-wave superconductor. These states give rise to zero-bias peaks in the local density of states, observed in scanning tunneling microscopy experiments. The field dependence of the peaks is obtained by averaging with respect to the spatially nonuniform Doppler shifts in the energy of excitations. The hybridization of the magnetic-field-induced nodal quasiparticles with the impurity resonances results in the suppression and broadening of the zero-bias peaks. The height of the peaks is found to scale as (Hc2/H)1/2. The magnetic-field response of the peaks is shown to be strongly dependent on the field orientation.