Search for new superconductors and frustrated magnets by means of the ionic liquid synthesis method

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K13831
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics II
• Research Institution: The University of Tokyo
• Principal Investigator: HIROI ZENJI 東京大学, 物性研究所, 教授 (30192719)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 物質開発 / 超伝導 / 磁気フラストレーション / イオン液体合成 / 水熱合成

Outline of Final Research Achievements

We have carried out the syntheses of new superconductors and frustrated magnets by using the ionic liquid and hydrothermal synthesis methods in order to give a breakthrough to the materials search in the strongly correlated electron system. We prepared crystals of Te4[BixCl4] by the ionic liquid synthesis method. Although the previous study reported the superconductivity of the compound, we could not obtain the evidence for this. The hydrothermal synthesis yielded a single crystal of the new kagome antiferromagnet CdCu3(OH)6(NO3)2・H2O (CdK). We found an unconventional magnetic order with a negative vector chirality in CdK. Moreover, a series of magnetization plateaus are observed under ultrahigh magnetic fields up to 160 T, which indicates the formation of magnon crystals on the kagome net.

Free Research Field

磁気フラストレーション