Search for Bose condensation and quantum criticality in quasicrystal

2015 Fiscal Year Final Research Report

• Project/Area Number: 26610100
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics II
• Research Institution: Nagoya University
• Principal Investigator: Sato Noriaki 名古屋大学, 理学(系)研究科(研究院), 教授 (30170773)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 準結晶 / 近似結晶 / 量子臨界現象 / 超伝導

Outline of Final Research Achievements

The purpose of this project is twofold; the search for quantum critical phase and Bose condensation (such as superconductivity) in quasicrystal. For the former purpose, we obtained a result suggesting the existence of the quantum critical phase in quasicrystal via the investigation of high-pressure magnetic properties of the relevant approximant crystal. For the latter purpose, we succeeded in finding new approximant superconductors with the Tsai-type cluster, but failed to find a new superconducting quasicrystal. We also found that while the superconductivity occurs in the Al-Mg-Zn approximants, it does not in the quasicrystal. To resolve this origin remains to be resolved in the future.

Free Research Field

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