Paramagnetic Meissner effect in topological superconductors

2016 Fiscal Year Final Research Report

• Project/Area Number: 26287069
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Hokkaido University
• Principal Investigator: ASANO Yasuhiro 北海道大学, 工学(系)研究科(研究院), 准教授 (20271637)
• Co-Investigator(Kenkyū-buntansha): 延兼 啓純 北海道大学, 理学(系)研究科(研究院), 助教 (60550663) ; 丹田 聡 北海道大学, 工学(系)研究科(研究院), 教授 (80217215)
• Co-Investigator(Renkei-kenkyūsha): AMITSUKA Hiroshi 北海道大学, 大学院理学研究院, 教授 (40212576)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 超伝導

Outline of Final Research Achievements

The diamagnetism is a essential property of all superconductors. However, the paramagnetic response has been observed in a number of small superconductors. The mechanism and basic physical picture of the paramagnetic response has been an open question. In this project, we make clear (1) odd-frequency Cooper pairs appear at a surface of a topological superconductor, (2) odd-frequency Cooper pairs are paramagnetic, (3) therefore odd-frequency Cooper pairs are responsible for the paramagnetic response of a small topological superconductor at low temperature.

Free Research Field

物性理論特に超伝導現象論