TY - JOUR
T1 - New intercalation superconductors Ax(C2H8N2)yMoSe2 (A = Ca, Sr, Ba) synthesized by solvothermal method
AU - Sato, Kazuki
AU - Noji, Takashi
AU - Ueno, Shota
AU - Kawamata, Takayuki
AU - Kato, Masatsune
AU - Koike, Yoji
N1 - Funding Information:
Acknowledgments This work was supported by JSPS KAKENHI Grant Number 16K05429. One of the authors (K.S.) was supported by the Tohoku University Division for Interdisciplinary Advanced Research and Education.
Publisher Copyright:
©2018 The Physical Society of Japan.
PY - 2018
Y1 - 2018
N2 - 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.
AB - 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.
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U2 - 10.7566/JPSJ.87.113702
DO - 10.7566/JPSJ.87.113702
M3 - Article
AN - SCOPUS:85055640765
SN - 0031-9015
VL - 87
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 11
M1 - 113702
ER -