论文标题
在II型超导体的涡旋晶格中充电
Charging in the vortex lattice of type-II superconductors
论文作者
论文摘要
我们基于增强的准经典方程式在Abrikosov晶格中研究涡旋核电荷在Abrikosov晶格中的磁场依赖性，除了众所周知的Lorentz Force以外，我们在其中包含了配对梯度梯度（PPG）术语的特征。我们的数值结果为$ t = 0.2 t _ {\ rm c} $，$ 0.5 t _ {\ rm c} $表明，定期充电重新分布叠加在磁性通量晶状体上，在不同字段的空间模式不同。 ppg项在较弱的田间占主导地位，而洛伦兹力在涡旋核中积聚电荷，而洛伦兹的力在较高的场上占上风，从而在核心电荷中产生峰值结构，约为$ h \ sim \ sim \ sim \ frac {1} {1} {2} {2} {2} {2} {2}我们使用适用于Cuprates的参数来估计核心费用的峰值在$ t = 0.2 t _ {\ rm c} $，以获得$ q \ sim 10^{ - 2} | e | $的较大值，在RADIUS的核心区域$ 0.2P $ ab $ ab $ plane的核心区域，$ ab $ plane un $ ab $0.2ξ_5
We study the magnetic-field dependence of the vortex-core charge in the Abrikosov lattice of an $s$-wave superconductor based on the augmented quasiclassical equations, where we incorporate the pair-potential gradient (PPG) terms characteristic of charging in superconductors besides the well-known Lorentz force. Our numerical results at $T=0.2 T_{\rm c}$ and $0.5 T_{\rm c}$ reveal that periodic charge redistribution is superimposed on the magnetic flux-line lattice with different spatial patterns at different fields. The PPG terms are dominant at weak fields over the Lorentz force for accumulating charge in the vortex cores, whereas the Lorentz force prevails at higher fields to give rise to a peak structure in the core charge around $H\sim \frac{1}{2}H_{{\rm c}2}$. We estimate the peak value of the core charge at $T=0.2 T_{\rm c}$ using parameters appropriate for cuprates to obtain a large value of $Q \sim 10^{-2} |e|$ in the core region of radius $0.2 ξ_0$ in the $ab$ plane and length $1 \ {\rm nm}$ along the $c$ axis.
