报告内容简介:Superconductivity is commonly destroyed by a magnetic field due to orbital or Zeeman-induced pair breaking. Surprisingly, the spin-valley locking in an Ising superconductor makes the superconducting state resilient to large magnetic fields. In the presence of an in-plane magnetic field, the emerging finite-energy pairing correlations manifest themselves in the occurrence of "mirage" gaps: at (high) energies of the order of the spin-orbit coupling strength, a gaplike structure in the spectrum emerges that mirrors the main superconducting gap. These mirage gaps are signatures of the equal-spin triplet finite-energy pairing correlations.

In a Josephson junction formed by two Ising superconductors that are in proximity to ferromagnetic layers, the supercurrent due to the triplet pairing correlations is controlled by the magnetic exchange fields. We show that both the charge and spin supercurrents can be modulated by the exchange fields.

References:

G. Tang, C. Bruder, and W. Belzig, Phys. Rev. Lett.126, 237001 (2021)

G. Tang, R. L. Klees, C. Bruder, and W. Belzig, Phys. Rev. B104, L241413 (2021)

报告人简介:唐高民博士，2012年于电子科技大学获学士学位，2016年于香港大学获博士学位。先后在香港大学、新加坡国立大学和瑞士巴塞尔大学从事博士后研究。目前在香港科技大学进行学术访问，即将入职中物院研究生院。研究方向包括量子输运、超导和近场热辐射等，已在Physical Review Letters、ACS Photonics、Physical Review B和Physical Review Applied等期刊发表文章20多篇。

邀请人：王健

报告时间：2022年8月12日星期五下午2:30

报告形式：#腾讯会议：344-760-590,会议密码：1007

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