1998/04/07 by Hideki Tanaka, Kazuhiro Kuboki, Manfred Sigrist · 1 citation
Mathematics · Physics and Astronomy · #Antiferromagnetism #Boson #Bound state #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Friedel oscillations #Hubbard model #Impurity #Mathematics #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum mechanics #State (computer science) #Superconductivity #Symmetry (geometry) #T-symmetry #cond-mat.str-el #cond-mat.supr-con #t-J model
paper · pdf · doi:10.1142/s0217979298001435
published as Int. J. Mod. Phys. Vol.24, 2447 (1998) · 4 pages, 4 figures
arxiv created 1998/04/07 · openalex publication_date 1998/09/30 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the effect of nonmagnetic impurities in the superconducting state of the t–J model. The Bogoliubov de Gennes equation is derived using a slave-boson mean-field approximation, and we solve it numerically at T = 0. The d x 2 -y 2 -wave order parameter is suppressed near an impurity and the extended s-wave component is induced. We also find the local CDW-like feature due to the Friedel oscillations. This leads to the splitting of the expected zero-energy Andreev bound state. Therefore the system is unlikely introducing a localized state of other symmetry such as superconductivity with broken time reversal symmetry or antiferromagnetism.