| Pressure-Induced Valence Crossover in Superconducting CeCu_{2}Si_{2}. | |
| | |
MedLine Citation:
|
PMID: 21635111 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
|
Measurement of the Ce valence in the heavy fermion CeCu_{2}Si_{2} is reported for the first time under pressure and at low temperature (T=14 K) in proximity of the superconducting region. CeCu_{2}Si_{2} is considered as a strong candidate for a new type of pairing mechanism related to critical valence fluctuations which could set in at high pressure in the vicinity of the second superconducting dome. A quantitative estimate of the valence in this pressure region was achieved from the measurements of the Ce L_{3} edge in the high-resolution partial-fluorescence yield mode and subsequent analysis of the spectra within the Anderson impurity model. While a clear increase of the Ce valence is found, the weak electron transfer and the continuous valence change under pressure suggests a crossover regime with the hypothetical valence line terminating at a critical end point T_{cr} close to zero. |
| | |
Authors:
|
J-P Rueff; S Raymond; M Taguchi; M Sikora; J-P Itié; F Baudelet; D Braithwaite; G Knebel; D Jaccard |
Publication Detail:
|
Type: Journal Article Date: 2011-05-06 |
Journal Detail:
|
Title: Physical review letters Volume: 106 ISSN: 1079-7114 ISO Abbreviation: Phys. Rev. Lett. Publication Date: 2011 May |
Date Detail:
|
Created Date: 2011-06-03 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0401141 Medline TA: Phys Rev Lett Country: United States |
Other Details:
|
Languages: eng Pagination: 186405 Citation Subset: IM |
Affiliation:
|
Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex, France and Laboratoire de Chimie Physique-Matière et Rayonnement, CNRS-UMR 7614, UPMC, 75005, Paris, France. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Ferromagnetic Enhancement of CE-Type Spin Ordering in (Pr,Ca)MnO_{3}.
Next Document: Semiclassical neutral atom as a reference system in density functional theory.