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Direct visualization of sign reversal s^+- superconducting gaps in FeTe0.55Se0.45
Mingyang Chen, Qingkun Tang, Xiaoyu Chen +7
In many unconventional superconductors, the pairing of electrons is driven by the repulsive interaction, which leads to the sign reversal of superconducting gaps along the Fermi su…
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…
Direct Evidence of Superconductivity with Twofold Symmetry in Bi2Te3 Thin Film Deposited on FeTe0.55Se0.45
Minyang Chen Xiaoyu Chen, Huan Yang, Zengyi Du +1
Topological superconductor is a timely and frontier topic in condensed matter physics. In superconducting state, an order parameter will be established with the basic or subsidiary…
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$…
Vortex lattice and vortex bound states in CsFeAs investigated by scanning tunneling microscopy/spectroscopy
Xiong Yang, Zengyi Du, Hai Lin +4
We investigate the vortex lattice and vortex bound states in CsFeAs single crystals by scanning tunneling microscopy/spectroscopy (STM/STS) under various magnetic fields. A…