Investigation of Superfluidity of Charge Density Waves

2014 Fiscal Year Final Research Report

• Project/Area Number: 24740214
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics II
• Research Institution: Hokkaido University
• Principal Investigator: MATSUURA Toru 北海道大学, 工学(系)研究科(研究院), 助教 (60534758)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 電荷密度波 / 量子干渉効果 / アハラノフボーム効果 / 非線形伝導 / ソリトン / 機械振動子

Outline of Final Research Achievements

We investigated superfluidity of charge density waves (CDWs) in ring-shaped crystals of TaS3 and NbS3. Initially, we were planning to use a mechanical cantilever technique to detect a signal of CDW current through ring. However, accuracy of commercial sensors was not sufficient. Then we investigated mechanical detection of using CDW materials of whisker crystals. We also investigated CDW in TaS3 whisker crystals, and found that there are many 2π phase solitons at random in the CDW state of TaS3 [Europhys. Lett. 109, 27005 (2015)].

Free Research Field

凝縮系物理学