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| Format: | Artículo científico |
| Language: | en |
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Sociedade Brasileira de Física
2003
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| Online Access: | https://www.redalyc.org/articulo.oa?id=46413573024 |
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Table of Contents:
- Distinguishing Models for the Pseudo-gap in Cuprate Superconductors by Probing the Spatial Distribution of Impurity States C. Kübert Física, Astronomía y Matemáticas We argue that the spatial distribution of resonant impurity states in underdoped high-Tc superconductors serves as a probe for distinguishing different theoretical models for the pseudogap state. Superconducting pairing fluctuations are characterized by off-diagonal short-range order which distinguishes them from other possible instabilities that could give rise to the pseudogap phenomena. Due to the mixture of particle and hole states in a superconductor an impurity resonant state is composed of both a particle and a hole-like component. On the contrary a state with a gap induced by a particle-hole instability, like a d-density wave (DDW) or spin-density wave (SDW), exhibits no off-diagonal short-range order and consequently a resonant impurity state consists of only one either particle or hole-like component. Furthermore, a charge-spin separated state shows no resonance state at all inside the gap region. 2003 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46413573024 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.4 Vol.33