非均质 cuprate 中的去局域化费米子
超导电性
2009-11-11 v3
摘要
低温热传导用于探讨高纯度单晶 YBaCuO 轻掺杂 cuprate 的基态。样品在超导相变边界的两侧、在零场和外加磁场下进行测量。我们报告在非超导态中观察到零能处的去局域化费米子激发，这表明 underdoped cuprate 的基态为金属性。其低能谱似乎类似于 d 型超导体的谱，即可格点。观察到的 underdoped LaSrCuO 绝缘基态归因于该系统中存在的竞争自旋密度波有序。
引用
@article{arxiv.cond-mat/0501247,
title = {Delocalized fermions in underdoped cuprates},
author = {Mike Sutherland and S. Y. Li and D. G. Hawthorn and R. W. Hill and F. Ronning and M. A. Tanatar and J. Paglione and H. Zhang and Louis Taillefer and J. DeBenedictis and Ruixing Liang and D. A. Bonn and W. N. Hardy},
journal= {arXiv preprint arXiv:cond-mat/0501247},
year = {2009}
}
备注
4 pages, 3 figures; published in Physical Review Letters