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
Resonance State Localized around Nonmagnetic Impurity with Unitarity Scattering in Two-Dimensional d-Wave Superconductor. / Onishi, Yoshifumi; Ohashi, Yoji; Shingaki, Yasunori; Miyake, Kazumasa.
In: Journal of the Physical Society of Japan, Vol. 65, No. 3, 1996, p. 675-678.Research output: Contribution to journal › Article
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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 -