文章基本信息

标题：Magnetism and superconductivity driven by identical 4f states in a heavy-fermion metal
本地全文：下载
作者：Sunil Nair ; O. Stockert ; U. Witte 等
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：2010
卷号：107
期号：21
页码：9537-9540
DOI：10.1073/pnas.1004958107
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：The apparently inimical relationship between magnetism and superconductivity has come under increasing scrutiny in a wide range of material classes, where the free energy landscape conspires to bring them in close proximity to each other. Particularly enigmatic is the case when these phases microscopically interpenetrate, though the manner in which this can be accomplished remains to be fully comprehended. Here, we present combined measurements of elastic neutron scattering, magnetotransport, and heat capacity on a prototypical heavy fermion system, in which antiferromagnetism and superconductivity are observed. Monitoring the response of these states to the presence of the other, as well as to external thermal and magnetic perturbations, points to the possibility that they emerge from different parts of the Fermi surface. Therefore, a single 4f state could be both localized and itinerant, thus accounting for the coexistence of magnetism and superconductivity.
关键词：strongly correlated electron systems ; antiferromagnetism