Quantum interference between nonmagnetic impurities indx2−y2-wave superconductors
نویسندگان
چکیده
منابع مشابه
Quantum Interference Phenomena Between Impurity States in d-wave Superconductors
We investigate the mutual influence of impurities in two-dimensional d-wave superconductors involving selfconsistent solutions of the Bogoliubov-de Gennes equations. The local order parameter suppression, the local density of states (LDOS) as well as the interference of impurity-induced structures are analyzed. We employ an impurity position averaging scheme for the DOS that does not neglect th...
متن کاملZinc impurities in d-wave superconductors.
We study the two-dimensional Hubbard model with nonmagnetic Zn impurities modeled by binary diagonal disorder using quantum Monte Carlo within the dynamical cluster approximation. With increasing Zn content we find a strong suppression of d-wave superconductivity and an enhancement of antiferromagnetic spin correlations. T(c) vanishes linearly with Zn impurity concentration. The spin susceptibi...
متن کاملOff-Diagonal Nonmagnetic Disorder in s- and d-Wave Superconductors
The previously developed approach to study off-diagonal disorder has been extended and applied to both sand d-wave superconductors. The derived equations allow the self-consistent solution of the problem. For a special case of negative U centres embedded in non-superconducting host we have calculated their critical concentration for the appearance of superconductivity and found it equal to ≈ 0....
متن کاملIn-gap bound states induced by nonmagnetic impurities in two-band s± superconductors
The physics of single nonmagnetic impurity immersed in a two-band s-wave superconductor with relative phase 0 between its two order parameters is studied and elucidated. It is shown that midgap bound states are always induced by nonmagnetic impurities when = s -wave superconductors . These bound states emerge as a consequence of the topological nature of the corresponding Bogoliubov-de Gennes e...
متن کاملStates of local moment induced by nonmagnetic impurities in cuprate superconductors.
By using a model Hamiltonian with d-wave superconductivity and competing antiferromagnetic (AF) orders, the local staggered magnetization distribution due to nonmagnetic impurities in cuprate superconductors is investigated. We show that the net moment induced by a single impurity corresponds to a local spin with S(z)=0 or 1/2 depending on the strength of the AF interaction U and the impurity s...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 2002
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.66.140508