Synthesis of lithium- and pyridine-intercalated superconductors Lix (C5H5N)y SnSe2

Chika Sakamoto, Takashi Noji, Takayuki Kawamata, Masatsune Kato

Research output: Contribution to journalArticlepeer-review


Superconductors Li x (C5H5N) y SnSe2 (x = 0.3-1.0) have been successfully synthesized by the intercalation of pyridine molecules together with Li+ ions into an insulator SnSe2 with the layered structure. The co-intercalation has been carried out by immersing powdery SnSe2 and Li metal in the organic solvent pyridine at 70 °C. The spacing between the adjacent Sn layers is expanded from ∼6 to ∼12 Å through the co-intercalation. It has been found that the superconducting transition temperature T c ∼7.5-7.9 K is almost independent of Li-content x(Li) and the superconducting volume fraction has a maximum at x(Li) = 0.5.

Original languageEnglish
Article number108002
JournalJapanese journal of applied physics
Issue number10
Publication statusPublished - 2022 Oct 1


  • electron-doping
  • intercalation
  • lithium
  • organic molecule
  • superconducting transition temperature
  • superconductivity

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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