### Abstract

Effects of nonmagnetic impurities with unitarity scattering in two-dimensional d-wave superconductors are investigated by the numerical diagonalization of finite-size systems of up to 35×35 sites. It is shown that a localized state with almost zero excitation energy is formed around an impurity site if it is isolated. However, its localized state is extended in real space along the direction of the node of the d-wave gap, so that the localized states of adjacent impurities easily interfere with each other forming a kind of impurity band, i.e., resonance states around the zero energy. It is also pointed out that there exists a strong association between the resonance density of states due to impurity scattering in the unitarity limit and the so-called zero-bias anomaly of tunneling conductance.

Original language | English |
---|---|

Pages (from-to) | 675-678 |

Number of pages | 4 |

Journal | Journal of the Physical Society of Japan |

Volume | 65 |

Issue number | 3 |

Publication status | Published - 1996 |

Externally published | Yes |

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### Keywords

- Impurity scattering with unitarity limit in d-wave superconductivity
- Zero-bias anomaly of tunneling conductance

### ASJC Scopus subject areas

- Physics and Astronomy(all)

### Cite this

*Journal of the Physical Society of Japan*,

*65*(3), 675-678.

**Resonance State Localized around Nonmagnetic Impurity with Unitarity Scattering in Two-Dimensional d-Wave Superconductor.** / Onishi, Yoshifumi; Ohashi, Yoji; Shingaki, Yasunori; Miyake, Kazumasa.

Research output: Contribution to journal › Article

*Journal of the Physical Society of Japan*, vol. 65, no. 3, pp. 675-678.

}

TY - JOUR

T1 - Resonance State Localized around Nonmagnetic Impurity with Unitarity Scattering in Two-Dimensional d-Wave Superconductor

AU - Onishi, Yoshifumi

AU - Ohashi, Yoji

AU - Shingaki, Yasunori

AU - Miyake, Kazumasa

PY - 1996

Y1 - 1996

N2 - Effects of nonmagnetic impurities with unitarity scattering in two-dimensional d-wave superconductors are investigated by the numerical diagonalization of finite-size systems of up to 35×35 sites. It is shown that a localized state with almost zero excitation energy is formed around an impurity site if it is isolated. However, its localized state is extended in real space along the direction of the node of the d-wave gap, so that the localized states of adjacent impurities easily interfere with each other forming a kind of impurity band, i.e., resonance states around the zero energy. It is also pointed out that there exists a strong association between the resonance density of states due to impurity scattering in the unitarity limit and the so-called zero-bias anomaly of tunneling conductance.

AB - Effects of nonmagnetic impurities with unitarity scattering in two-dimensional d-wave superconductors are investigated by the numerical diagonalization of finite-size systems of up to 35×35 sites. It is shown that a localized state with almost zero excitation energy is formed around an impurity site if it is isolated. However, its localized state is extended in real space along the direction of the node of the d-wave gap, so that the localized states of adjacent impurities easily interfere with each other forming a kind of impurity band, i.e., resonance states around the zero energy. It is also pointed out that there exists a strong association between the resonance density of states due to impurity scattering in the unitarity limit and the so-called zero-bias anomaly of tunneling conductance.

KW - Impurity scattering with unitarity limit in d-wave superconductivity

KW - Zero-bias anomaly of tunneling conductance

UR - http://www.scopus.com/inward/record.url?scp=0030542929&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030542929&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0030542929

VL - 65

SP - 675

EP - 678

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

SN - 0031-9015

IS - 3

ER -