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 1803.00510cond-mat.supr-con
收藏

与时间相关的伦敦方法,由于移动涡的堆芯外正常激励引起的耗散

Time dependent London approach, dissipation due to out-of-core normal excitations by moving vortices

V. G. Kogan

摘要:

正常激励引起的耗散电流包括在伦敦描述中。由此产生的时间相关的伦敦方程求解一个移动的涡和一个移动的涡格子。结果表明,运动涡旋的场分布失去了圆柱对称性,它在运动方向上的收缩比在垂直于速度$\bm v$的方向上的收缩大。正常电流对耗散的伦敦贡献相对于Bardeen-Stephen核心耗散在小速度下较小,但在高速度下接近后者,其中该贡献不再与$v^2$成比例。为了最大限度地减少伦敦的贡献耗散,涡晶格取向,使其中一个单位单元的矢量沿速度,在实验中看到的效果和预测的时间依赖的金兹伯格-朗道理论。

英文摘要:

The dissipative currents due to normal excitations are included in the London description. The resulting time dependent London equations are solved for a moving vortex and a moving vortex lattice. It is shown that the field distribution of a moving vortex looses it cylindrical symmetry, it experiences contraction which is stronger in the direction of the motion, than in the direction normal to the velocity $\bm v$. The London contribution of normal currents to dissipation is small relative to the Bardeen-Stephen core dissipation at small velocities, but approaches the latter at high velocities, where this contribution is no longer proportional to $v^2$. To minimize the London contribution to dissipation, the vortex lattice orients as to have one of the unit cell vectors along the velocity, the effect seen in experiments and predicted within the time-dependent Ginzburg-Landau theory.

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。

↑