ABSTRACT
A phase characterised by a spatially-modulated order parameter is counter-intuitive because of the entropy penalty that the modulations incur. Its possible existence in superconductors was first proposed under conditions that the formation of Cooper pair is limited to some segments of the Fermi surface and that the Cooper pairs carry momentum above the Pauli limit. This prediction motivated experimental efforts to identify such non-uniform superconducting states in organic superconductors, heavy fermion compounds and cuprates. Here we report evidence for another type of finite-momentum pairing that manifests below the Pauli limit. It is driven by the orbital effect and does not rely on Fermi surface segmentation. We have evidence for this spatially modulated superconducting state in a hexagonal MoS2 bilayer through remote intercalation that offers both balanced doping and firm out-of-plane coherence across both layers.
BIOGRAPHY
Dr. Zhao has investigated a broad research area, including organic semiconductors, ferroelectric and piezoelectric materials, and superconductivity. He received his Bachelor's degree in physics in 2011 from Peking University and, in the same year, went to Karlsruhe Institute of Technology in Germany for a Master's study in Optics and Photonics. He did his Master's Thesis in 2013 in Philips Research Laboratories in Aachen, Germany, on exciton physics in organic light-emitting diodes. In 2017, he received his Ph.D. from Max-Planck Institute for Polymer Research in Germany, where his research focus was on ferroelectric polymers and ceramics. From 2017 to now, he worked as a Postdoc at Max-Planck Institute for Solid State Research in Germany. His research interest now focuses on superconductivity in two-dimensional systems.
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