New intercalation superconductors Ax(C2H8N2)yMoSe2 (A = Ca, Sr, Ba) synthesized by solvothermal method

Kazuki Sato, Takashi Noji, Shota Ueno, Takayuki Kawamata, Masatsune Kato, Yoji Koike

Research output: Contribution to journalArticle

Abstract

Using the solvothermal method, we have successfully synthesized new MoSe2-based intercalation superconductors Ax(C2H8N2)yMoSe2 (A = Ca, Sr, Ba; x = 1) with Tc = 6.0, 6.4, and 7.2 K, respectively, through the co-intercalation of alkaline-earth metals and ethylenediamine into semiconducting 2H-MoSe2. It has been concluded that the Tc values in the MoSe2-based intercalation superconductors are clearly related to the electronic density of states (EDOS) at the Fermi level. Moreover, it has been found that the Tc value increases with increasing ionic radius of A in Ax(C2H8N2)yMoSe2 (A = Ca, Sr, Ba; x = 1), which is speculated to be due to the increase in the a-axis length and the resulting increase in the EDOS at the Fermi level. The solvothermal method is useful for the synthesis of both alkaline-earth metal-and organic molecule-intercalated superconductors.

Original languageEnglish
Article number113702
Journaljournal of the physical society of japan
Volume87
Issue number11
DOIs
Publication statusPublished - 2018 Jan 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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