arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0712.0936cond-mat.supr-concond-mat.str-el
收藏

铜氧化物双层膜中涡核能量的掺杂效应

Doping dependence of the vortex-core energy in bilayer films of cuprates

L. Benfatto, C. Castellani, T. Giamarchi

摘要:

产生涡旋核所需的能量是解决欠掺杂铜酸盐中热涡旋波动物理学的基本成分。在这里,我们从理论上研究它的作用的发生Beresinskiii-Kosterlitz-无相变的双层膜的不均匀性。通过与Hetel等人[Nat.Phys.3,700(2007)]对Y $_{1-x}$ Ca $_{x}$ Ba $_{2}$ Cu $_{3}$ O $_{7-\d}$(YBCO)的两个晶胞薄膜中的穿透深度的最新测量的比较,我们可以提取涡旋芯能量$μ$的值,并且表明在低掺杂下$μ$与$T_c$线性地成比例。

英文摘要:

The energy needed to create a vortex core is the basic ingredient to address the physics of thermal vortex fluctuations in underdoped cuprates. Here we theoretically investigate its role on the occurrence of the Beresinskii-Kosterlitz-Thouless transition in a bilayer film with inhomogeneity. From the comparison with recent measurements of the penetration depth in two-unit cell thin films of Y$_{1-x}$Ca$_{x}$Ba$_{2}$Cu$_{3}$O$_{7-\d}$ (YBCO) by Hetel et al. [Nat. Phys. 3, 700 (2007)] we can extract the value of the vortex-core energy $μ$, and show that $μ$ scales linearly with $T_c$ at low doping.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑