IHEP OpenIR  > 多学科研究中心
A large iron isotope effect in SmFeAsO1-xFx and Ba1-xKxFe2As2
Liu, RH; Wu, T; Wu, G; Chen, H; Wang, XF; Xie, YL; Ying, JJ; Yan, YJ; Li, QJ; Shi, BC; Chu, WS; Wu, ZY; Chen, XH; Chu WS(储旺盛); Wu ZY(吴自玉)
2009
发表期刊NATURE
卷号459期号:7243页码:#REF!
通讯作者Chen, XH (reprint author), Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China.
文章类型Article
摘要The recent discovery of superconductivity in oxypnictides with a critical transition temperature (T-C) higher than the McMillan limit of 39K (the theoretical maximum predicted by Bardeen-Cooper-Schrieffer theory) has generated great excitement(1-5). Theoretical calculations indicate that the electron-phonon interaction is not strong enough to give rise to such high transition temperatures(6), but strong ferromagnetic/antiferromagnetic fluctuations have been proposed to be responsible(7-9). Superconductivity and magnetism in pnictide superconductors, however, show a strong sensitivity to the crystal lattice, suggesting the possibility of unconventional electron-phonon coupling. Here we report the effect of oxygen and iron isotope substitution on T-C and the spin-density wave (SDW) transition temperature (T-SDW) in the SmFeAsO1-xFx and Ba1-xKxFe2As2 systems. The oxygen isotope effect on T-C and T-SDW is very small, while the iron isotope exponent alpha(C) =-dlnT(C)/dlnM is about 0.35 (0.5 corresponds to the full isotope effect). Surprisingly, the iron isotope exchange shows the same effect on T-SDW as T-C. This indicates that electron-phonon interaction plays some role in the superconducting mechanism, but a simple electron-phonon coupling mechanism seems unlikely because a strong magnon-phonon coupling is included.
学科领域Science & Technology - Other Topics
DOI10.1038/nature07981
收录类别SCI
WOS类目Multidisciplinary Sciences
WOS记录号WOS:000265801300029
引用统计
被引频次:134[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/225868
专题多学科研究中心
推荐引用方式
GB/T 7714
Liu, RH,Wu, T,Wu, G,et al. A large iron isotope effect in SmFeAsO1-xFx and Ba1-xKxFe2As2[J]. NATURE,2009,459(7243):#REF!.
APA Liu, RH.,Wu, T.,Wu, G.,Chen, H.,Wang, XF.,...&吴自玉.(2009).A large iron isotope effect in SmFeAsO1-xFx and Ba1-xKxFe2As2.NATURE,459(7243),#REF!.
MLA Liu, RH,et al."A large iron isotope effect in SmFeAsO1-xFx and Ba1-xKxFe2As2".NATURE 459.7243(2009):#REF!.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
783.pdf(292KB)期刊论文作者接受稿限制开放CC BY-NC-SA请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Liu, RH]的文章
[Wu, T]的文章
[Wu, G]的文章
百度学术
百度学术中相似的文章
[Liu, RH]的文章
[Wu, T]的文章
[Wu, G]的文章
必应学术
必应学术中相似的文章
[Liu, RH]的文章
[Wu, T]的文章
[Wu, G]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。