Doping and Isotope Dependence of the Pseudogap in High-Tc Cuprates Observed by Neutron Crystal-Field Spectroscopy: A Fast Local Probe View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2000-10

AUTHORS

D. Rubio, J. Mesot, K. Conder, S. Janssen, H. Mutka, A. Furrer

ABSTRACT

The temperature dependence of the relaxation rate of crystal-field excitations in the high-Tc superconductors HoBa2Cu4O8 and HoBa2Cu3Ox (6.4 < x < 7) was investigated by inelastic neutron scattering techniques. The data show clear evidence for the opening of an electronic gap in the normal state at T* > Tc in the underdoped regime as well as for slightly overdoped samples. For HoBa2Cu4O8T* increases from 170 to 220 K upon oxygen isotope substitution (16O vs 18O). This huge isotope shift (which is absent in NMR and NQR experiments) suggests that the mechanism leading to an isotope effect on the pseudogap has to involve a time scale in the range 10−8 ≫ τ > 10−13 s. More... »

PAGES

727-730

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1023/a:1007806029650

DOI

http://dx.doi.org/10.1023/a:1007806029650

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1029618554


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