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journal article·2021-05Open access

Magic Doping and Robust Superconductivity in Monolayer FeSe on Titanates

Tao Jia, Zhuoyu Chen, Slavko N. Rebec, Makoto Hashimoto, Donghui Lu, Thomas P. Devereaux, Dung‐Hai Lee, Robert G. Moore, Zhi‐Xun Shen

Advanced Science· Volume 8· Issue 9
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Source abstract

Abstract

Abstract The enhanced superconductivity in monolayer FeSe on titanates opens a fascinating pathway toward the rational design of high‐temperature superconductors. Utilizing the state‐of‐the‐art oxide plus chalcogenide molecular beam epitaxy systems in situ connected to a synchrotron angle‐resolved photoemission spectroscope, epitaxial LaTiO3 layers with varied atomic thicknesses are inserted between monolayer FeSe and SrTiO3, for systematic modulation of interfacial chemical potential. With the dramatic increase of electron accumulation at the LaTiO3/SrTiO3 surface, providing a substantial surge of work function mismatch across the FeSe/oxide interface, the charge transfer and the superconducting gap in the monolayer FeSe are found to remain markedly robust. This unexpected finding indicate the existence of an intrinsically anchored “magic” doping within the monolayer FeSe systems.
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Research context

OpenAlex topics: Electronic and Structural Properties of Oxides · Iron-based superconductors research · Magnetic and transport properties of perovskites and related materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Stanford Institute for Materials and Energy Sciences SLAC National Accelerator Laboratory Menlo Park CA 94025 USA

Departments of Physics, Applied Physics, and Materials Science and Engineering Geballe Laboratory for Advanced Materials Stanford University Stanford CA 94305 USA

Stanford Synchrotron Radiation Lightsource SLAC National Accelerator Laboratory Menlo Park CA 94025 USA

Department of Physics University of California at Berkeley Berkeley CA 94720 USA

Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA

Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA

Funding

Office of Science · Basic Energy Sciences · U.S. Department of Energy · Oak Ridge National Laboratory

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