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

Yoshifumi Onishi, Yoji Ohashi, Yasunori Shingaki, Kazumasa Miyake

研究成果: Article査読

46 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)675-678
ページ数4
ジャーナルJournal of the Physical Society of Japan
65
3
DOI
出版ステータスPublished - 1996 1月 1
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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