欠掺杂YBCO中的磁动力学:超导能隙的直接观测
超导电性
2009-10-28 v1
摘要
使用极化和非极化三轴谱仪研究了欠掺杂的YBa_2Cu3O6.6。我们的结果表明,超导态中的自旋激发与完全掺杂材料中的基本相同,除了异常的41 meV共振在34.8 meV处被观察到。正常态的自旋激发以弱能量依赖的连续谱为特征,其温度依赖性在Tc处显示出超导能隙的清晰特征。共振处的增强伴随着更高和更低能量下磁涨落的抑制。
引用
@article{arxiv.cond-mat/9611123,
title = {Magnetic Dynamics in Underdoped YBCO: Direct Observation of a Superconducting Gap},
author = {P. Dai and M. Yethiraj and H. A. Mook and T. B. Lindemer and F. Dogan},
journal= {arXiv preprint arXiv:cond-mat/9611123},
year = {2009}
}
备注
12 pages, 4 Postscript figures, Physical Review Letters, to be published