Peak-effect and surface crystal-glass transition for surface-pinned vortex array
超导电性
2019-10-01 v1 无序系统与神经网络
摘要
The peak effect has been investigated in clean Nb crystals with artificially corrugated surfaces by measuring the linear surface impedance in the 1kHz-1MHz frequency range. From a two-mode analysis of the complex spectra, we establish that vortex dynamics is governed by surface pinning and deduce the associated vortex slippage length. We demonstrate experimentally and theoretically that the peak effect is related to a transition from collective to individual surface pinning. A proper account of the peak-effect anomalies implies softening of the shear rigidity by disorder-induced lattice deformations. This leads to a vortex crystal-glass transition induced by surface defects.
引用
@article{arxiv.cond-mat/0212510,
title = {Peak-effect and surface crystal-glass transition for surface-pinned vortex array},
author = {B. Placais and N. Lutke-Entrup and J. Bellessa and P. Mathieu and Y. Simon and E. B. Sonin},
journal= {arXiv preprint arXiv:cond-mat/0212510},
year = {2019}
}
备注
12 pages, 2 figures