Interface engineering has been proven to be effective in discovering new quantum states, such as topological states, superconductivity, charge density waves, magnetism, etc., which require atomic-scale heterostructure fabrication.
Monolayer FeSe on SrTiOsubstrates has attracted intense interest owing to its remarkable interface-enhanced superconductivity.charge reservoir layer with oxygen vacancies as the intrinsic donors.
but preventing their clustering, as revealed by lowered work functions with reduced electronic variation. Monolayer FeSe films on such δ-doped SrTiO exhibit reduced intensity of domains and generally enlarged superconducting gaps, indicating the strengthened Cooper pairing with improved electronic homogeneity.
Consequently, the temperature-dependent resistivity measurements disclosed an onset transition temperature of 53 K and a zero-resistance temperature of 27 K. This work is published in the." Xiaotong Jiao from Shaanxi Normal University), Wenfeng Dong, Dr. Mingxia Shi and Dr. Heng Wang from Tsinghua University contributed equally to this work.: Enhanced superconductivity in monolayer FeSe films on SrTiO₃ via metallic δ-doping retrieved 26 April 2024 from https://phys.
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