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Preparation of superconducting parent compounds T′-RE2CuO4 by molecular beam epitaxy

✍ Scribed by Hideki Yamamoto; Akio Tsukada; Osamu Matsumoto; Michio Naito

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
246 KB
Volume
470
Category
Article
ISSN
0921-4534

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✦ Synopsis

High-T c superconductivity Parent-compound superconductors Nd 2 CuO 4 (T 0 ) structure MBE a b s t r a c t Recently, in contrast to the general consensus, there has been accumulating evidence indicating a series of parent compounds T 0 -RE 2 CuO 4 [RE = Pr, Nd, Sm, Eu, and Gd] prepared by metal-organic decomposition show superconductivity with T c even exceeding 30 K [O. Matsumoto, A. Utsuki, A. Tsukada, H. Yamamoto, T. Manabe, M. Naito, Phys. Rev. B 79 ( 2009) 100508(R) [1]]. Here, we report the preparation of superconducting films of T 0 -RE 2 CuO 4 by MBE with a post-reduction process. Using the MBE-grown films, we also performed photoemission experiments, the results of which suggest the superconducting carriers in the parent compounds arise not from accidental doping but from their intrinsically metallic nature.

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