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impurity correction to the density of states

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1 results

7 - Single Impurity Scattering
Tao Xiang, Chinese Academy of Sciences, Beijing, Congjun Wu, Westlake University, Hangzhou
Book:

D-wave Superconductivity

Published online:

17 June 2022

Print publication:

09 June 2022, pp 158-183
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Summary

Chapter 7 studies the single-impurity scattering effect on the density of states and other physical quantities. A low-energy resonance state induced by a unitary scattering potential is shown to exist in a d-wave superconductor, but is absent in an s-wave superconductor. The tunneling spectrum associated with a Zn impurity and the phenomenological theory of quasiparticle interference are discussed and compared with the experimental results. The in-gap resonance or bound states induced by a magnetic impurity and the Kondo effect in a d-wave superconductor are also discussed.