arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1604.01637cond-mat.supr-concond-mat.mtrl-sci
收藏

$d$波超导体中洛伦兹力引起的涡芯充电

Vortex-Core Charging Due to the Lorentz Force in a $d$-Wave Superconductor

Hikaru Ueki, Wataru Kohno, Takafumi Kita

摘要:

本文在松原形式下导出了含洛伦兹力的超导增广准经典方程,从而定量计算了超导电流引起的电荷重分布。利用它,我们得到了一个解析表达式的孤立涡在极端的II型材料的伦敦渗透深度和平衡霍尔系数。它强烈地依赖于费米面曲率和能隙各向异性,并且由于在不断增长的能隙下激发曲率的变化,甚至可以作为温度的函数改变符号。这一点在我们对高$T_{\rm c}$超导体的数值研究中也得到了证实。

英文摘要:

We derive augmented quasiclassical equations of superconductivity with the Lorentz force in the Matsubara formalism so that the charge redistribution due to supercurrent can be calculated quantitatively. Using it, we obtain an analytic expression for the vortex-core charge of an isolated vortex in extreme type-II materials given in terms of the London penetration depth and the equilibrium Hall coefficient. It depends strongly on the Fermi surface curvature and gap anisotropy, and may change sign even as a function of temperature due to the variation in the excitation curvature under the growing energy gap. This is also confirmed in our numerical study of high-$T_{\rm c}$ superconductors.

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。

↑