6 papers
Two superconducting components with different symmetries in Nd1-xSrxNiO2 films
Qiangqiang Gu, Yueying Li, Siyuan Wan +8
The pairing mechanism in cuprates remains as one of the most challenging issues in the field of condensed matter physics. The unique 3d9 electron orbital of the Cu2+ ionic states i…
Twofold symmetry of proximity-induced superconductivity in BiTe/BiSrCaCuO heterostructures revealed by scanning tunneling microscopy
Siyuan Wan, Qiangqiang Gu, Huazhou Li +5
We observe proximity-induced superconductivity in the \textit{in situ} prepared heterostructures constructed by topological insulator BiTe thin films and high-temperatu…
Non-volatile ferroelectric memory effect in ultrathin α-In2Se3
Siyuan Wan, Yue Li, Wei Li +8
Recent experiments on layered α-In2Se3 have confirmed its room-temperature ferroelectricity under ambient condition. This observation renders α-In2Se3 an excellent platform for dev…
Directly visualizing the sign change of d-wave superconducting gap in Bi2Sr2CaCu2O8+δ by phase-referenced quasiparticle interference
Qiangqiang Gu, Siyuan Wan, Qingkun Tang +7
The superconducting state is achieved by the condensation of Cooper pairs and is protected by the superconducting gap. The pairing interaction between the two electrons of a Cooper…
Sign reversal superconducting gaps revealed by phase referenced quasi-particle interference of impurity induced bound states in (LiFe)OHFeZnSe
Qiangqiang Gu, Siyuan Wan, Zengyi Du +5
By measuring the spatial distribution of differential conductance near impurities on Fe sites, we have obtained the quasi-particle interference (QPI) patterns in the (LiFe$…
A switchable diode based on room-temperature two-dimensional ferroelectric α-In2Se3 thin layers
Siyuan Wan, Yue Li, Wei Li +3
Nanoscaled room-temperature ferroelectricity is ideal for developing advanced non-volatile high-density memories. However, reaching the thin film limit in conventional ferroelectri…