| Abstrakt: |
In this letter we report the synthesis of superconducting T'-La2-xCexCuO4on SrTiO3(001) by molecular beam epitaxy. Although T'-La2-xCexCuO4with a very limited range of xcan be prepared by bulk synthesis using rather complicated techniques, this compound is very easy to obtain by thin film synthesis. Crucial to our success was the use of SrTiO3substrates, which seems to stabilize the formation of the T'structure by an epitaxial effect. The best Tcwas ?30 K by onset and ?28 K by zero resistance, which was obtained for x=0.109. The resistivity showed a metallic temperature dependence, and the film's overall behavior was similar to that for the best (Nd, Ce)2CuO4or (Pr, Ce)2CuO4films. Moreover, the single phase of the T'structure formed for a composition range of 0.09
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