Superconductivity of Rock-Salt Structure LaO Epitaxial Thin Film

Journal of the American Chemical Society
Kenichi KaminagaTomoteru Fukumura

Abstract

We report a superconducting transition in a LaO epitaxial thin film with the superconducting transition onset temperature ( Tc) at around 5 K. This Tc is higher than those of other lanthanum monochalcogenides and opposite to their chemical trend: Tc = 0.84, 1.02, and 1.48 K for LaX (X = S, Se, Te), respectively. The carrier control resulted in a dome-shaped Tc as a function of electron carrier density. In addition, the Tc was significantly sensitive to epitaxial strain in spite of the highly symmetric crystal structure. This rock-salt superconducting LaO could be a building block to design novel superlattice superconductors.

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Citations

Aug 29, 2019·ACS Omega·Kenichi KaminagaTomoteru Fukumura
Sep 14, 2019·Inorganic Chemistry·Hajime IshikawaHidenori Takagi

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