Host: Prof. Xin Liu

Venue: TDLI Meeting Room N400

Tencent meeting link: https://meeting.tencent.com/dm/ErlpKPvtkCgm     Meeting ID:  477594481 , no password

Abstract:

P-wave superconductors hold immense promise for both fundamental physics and practical applications due to their unusual pairing symmetry and potential topological superconductivity.  However, the exploration of the p-wave superconductors has proved to be a complex endeavor. Not only are they rare in nature but also the identification of p-wave superconductors has been an arduous task in history. For example, phase-sensitive measurement, an experimental technique which can provide conclusive evidence for unconventional pairing, has not been implemented successfully to identify p-wave superconductors. Here, we study a recently discovered family of superconductors, A2Cr3As3 (A = K, Rb, Cs), which were proposed theoretically to be p-wave superconductors.  We fabricate superconducting quantum interference devices (SQUIDs) on exfoliated K2Cr3As3, and perform the phase-sensitive measurement. It reveals the admixture of 0- and π-phase in these SQUIDs, and we conclude that the existence of the π-phase is in favor of the p-wave pairing symmetry in K2Cr3As3. Meanwhile, I will also show our recent progress about Kitaev Chain on hybrid nanowire with spin-orbit coupling.

Biography:

Jie Shen, Female, Associate professor at the Institute of Physics, Chinese Academy of Sciences. She leads the Sub-system of Ultra-low Temperature Quantum Transport within the Huairou SECUF. She obtained her Ph.D. from the Institute of Physics, Chinese Academy of Sciences in 2013. Following this, she conducted postdoctoral research at Yale University (2013-2015) and the Microsoft Quantum Lab at Delft University of Technology in the Netherlands (2015-2019). Her accolades include: 2021: CAS Youth Talent Program, Beijing Science and Technology Nova Award; 2024: Sir Martin Wood China Prize in Physics. She published over 50 papers in top journals including Science, Nature, and Nature Communications, with total citations exceed 6,000 an h-index of 25.