Studies on superconducting transport in graphene/superconductor junction at high magnetic fields

2014 Fiscal Year Final Research Report

• Project/Area Number: 25790010
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Nanostructural physics
• Research Institution: Tokyo University of Science
• Principal Investigator: TSUMURA KOHEI 東京理科大学, 理学部, 助教 (70583251)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: グラフェン / 超伝導近接効果 / 量子ホール効果 / 光照射効果

Outline of Final Research Achievements

In this research project, we have studied the coexistent state of superconductivity and quantum hall effect (QHE) by exploiting the unique electronic property of graphene. We have established a method to lower the contact resistance between graphene and NbN (type-II superconductor) by using graphene/Ti/Nb/NbN multi-layer construction, and have confirmed the proximity-induced superconducting state coexisting with QHE in graphene at high magnetic fields. Moreover, we have developed a novel probe method for the superconducting state in graphene by utilizing optically created non-equilibrium state and its relaxation.

Free Research Field

メゾスコピック超伝導