Search for new superconducting chromium compounds

2015 Fiscal Year Final Research Report

• Project/Area Number: 26887049
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: Ishida Shigeyuki 国立研究開発法人産業技術総合研究所, 電子光技術研究部門, 研究員 (90738064)
• Project Period (FY): 2014-08-29 – 2016-03-31
• Keywords: 新超伝導体探索 / クロム化合物 / ドーピング / 圧力効果

Outline of Final Research Achievements

We searched for new superconductors with layered crystal structures, especially, chromium compounds. We focused on KxCrSe2 (x = 0 and 0.5) and applied carrier doping and high pressure in order to induce superconductivity. We found that KxCrSe2 is insulating at ambient pressure. The resistivity decreases with pressure but it does not show metallic behavior up to 10 GPa. We also found that Li intercalation provides carrier to CrSe2, while it does not show superconductivity. In addition, we performed physical property measurements and electronic structure calculations on layered superconductor ZrP2-xSex and revealed the mechanism of superconductivity.

Free Research Field

超伝導