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Effect of non-magnetic impurity in superconducting states of t–J model

Kazuhiro Kuboki, Hideki Tanaka, Manfred Sigrist

Physica B Condensed MatterJan 1, 19991 citation

Impurity Effects on the Superconducting State with a Nodeless Gap in the t-J Model

Hiroki Tsuchiura, Yukio Tanaka, Masao Ogata +1 more

Springer eBooksJan 1, 19990 citations

Effects of Impurities on Superconductivity-like Phenomena in One-dimensional Systems

A. Zavadovskiǐ

Journal of Experimental and Theoretical PhysicsNov 1, 19681 citation

Study on Nonmagnetic Impurities in the Superconducting State of Two-Dimensional t-J Model

Hideki Tanaka, Kazuhiro Kuboki, Manfred Sigrist

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 dx2-y2-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.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 dx2-y2-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.

arXiv:cond-mat/9804076International Journal of Modern Physics BSep 30, 199811 citations

Effect of Spin-Orbit Impurity Scattering in the Superconducting State oft–JModel

Toshifumi Yagi, Kazuhiro Kuboki

We study the effect of magnetic impurities in the d_{x^2-y^2}-wave superconducting (SC) state of the two dimensional t-J model.The spin-orbit and the spin-exchange interactions are examined by treating the impurity as a classical spin. The Bogoliubov de Gennes equation derived within a slave-boson mean-field approximation is solved numerically at T = 0. The spin-exchange scattering induces spin-triplet p-wave SC order parameters near the impurity, while a SC state with broken time-reversal symmetry and a spontaneous current appears in the presence of the spin-orbit interaction. When both interactions coexist, it turns out that a state which carries a spontaneous spin current occurs.We study the effect of magnetic impurities in the d_{x^2-y^2}-wave superconducting (SC) state of the two dimensional t-J model.The spin-orbit and the spin-exchange interactions are examined by treating the impurity as a classical spin. The Bogoliubov de Gennes equation derived within a slave-boson mean-field approximation is solved numerically at T = 0. The spin-exchange scattering induces spin-triplet p-wave SC order parameters near the impurity, while a SC state with broken time-reversal symmetry and a spontaneous current appears in the presence of the spin-orbit interaction. When both interactions coexist, it turns out that a state which carries a spontaneous spin current occurs.

arXiv:cond-mat/0005503Journal of the Physical Society of JapanApr 15, 20011 citation

Superconductivity in the Two-Dimensional t-J Model.

幸則太田, R. Eder, 禎通前川

日本物理學會誌Jan 1, 19953 citations

Impurity effect in the superconducting state of the two-dimensional t–J model

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