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Study of superfluid condensation in the cuprates by Andreev reflections

 

作者: Guy Deutscher,  

 

期刊: AIP Conference Proceedings  (AIP Available online 1999)
卷期: Volume 483, issue 1  

页码: 225-230

 

ISSN:0094-243X

 

年代: 1999

 

DOI:10.1063/1.59593

 

出版商: AIP

 

数据来源: AIP

 

摘要:

A brief review is given of the advantages of Andreev scattering in the study of unconventional superconductors such as the cuprates. The use of clean interfaces is made possible by the Point Contact method. Andreev scattering is sensitive to the presence of nodes in the order parameter, which has allowed for an easy check of its symmetry in a large number of cuprates, NdCeCuO and LaSrCuO near optimum doping are two interesting exceptions to a d-wave symmetry. Andreev scattering probes the coherence energy scale in the superconducting state, which has been found to be smaller than the single particle excitation energy gap in the underdoped regime. The implications of this result for current models of the pseudogap are discussed. ©1999 American Institute of Physics.

 

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