open access

https://hdl.handle.net/2115/84883

Charging in the vortex lattice of type-II superconductors

英語

2022-02-22

American Physical Society (APS)

Physical Review B

105(6)

064514

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 = 0.2T(c) and 0.5T(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 similar to 1/2 H-c2. We estimate the peak value of the core charge at T = 0.2T(c) using parameters appropriate for cuprates to obtain a large value of Q similar to 10(-2) vertical bar e vertical bar in the core region of radius 0.2 xi(0) in the ab plane and length 1 nm along the c axis.

学術雑誌論文

Version of Record

©2022 American Physical Society

2469-9950