Resonant States in High-Temperature Superconductors with Impurities |
| |
Authors: | Kovačević Ž Plakida N M Hayn R |
| |
Institution: | (1) Joint Institute for Nuclear Research, Dubna, Moscow Oblast, Russia;(2) Faculty of Natural Science and Mathematics, University of Montenegro, Podgorica, Yugoslavia;(3) Institute for Solid State and Materials Research, Dresden, Germany |
| |
Abstract: | A microscopic theory of resonant states for the Zn-doped CuO2 plane in the superconducting phase is formulated in the effective t–J model. In the model derived from the original p–d model, Zn impurities are considered as vacancies for the d states at Cu sites. In the superconducting phase, in addition to the local static perturbation induced by the vacancy, a dynamical perturbation appears that results in a frequency-dependent perturbation matrix. Using the T-matrix formalism for the Green's functions in terms of the Hubbard operators, we calculate the local density of electronic states with d, p, and s symmetries. |
| |
Keywords: | high-temperature superconductors impurities resonance states t– J model |
本文献已被 SpringerLink 等数据库收录! |
|