Search for new electronic transport phenomena in chiral p-wave superconducting junction

Research Project

Project/Area Number	24540368
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Research Field	Condensed matter physics II
Research Institution	Shinshu University
Principal Investigator	KAMBARA Hiroshi 信州大学, 学術研究院教育学系, 准教授 (00313198)
Project Period (FY)	2012-04-01 – 2015-03-31
Project Status	Completed (Fiscal Year 2014)
Budget Amount *help	¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000) Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000) Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000) Fiscal Year 2012: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywords	ルテニウム酸化物 / ブレーク接合 / 局所電気伝導 / 強磁性 / 電気伝導 / ブレークジャンクション / トンネル効果 / 単原子接合 / 超伝導接合 / 無冷媒低温MCBJ装置 / ジョセフソン効果 / カイラル超伝導
Outline of Final Research Achievements	We started this project to explore new quantum transport phenomena in chiral p-wave superconducting (Sr2RuO4) junctions using mechanically controllable break junction (MCBJ) technique. However, it turned out to be difficult to perform very-low temperature MCBJ experiments. Thus, we carried out transport characteristics measurements of ferromagnetic ruthenium oxide SrRuO3 (Tc = 160 K) break junctions to investigate an influence of magnetism on local electronic transport. We observed large change of the differential conductance between the ferromagnetic state and the paramagnetic state.