Investigation of Gap Structure of the Quasi-One-Dimensional Organic Superconductor (DMET)2I3 by Thermal Conductivity in Magnetic Field

2015 Fiscal Year Final Research Report

• Project/Area Number: 25400380
• 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: Osaka City University
• Principal Investigator: Yoshino Harukazu 大阪市立大学, 大学院理学研究科, 准教授 (60295681)
• Co-Investigator(Renkei-kenkyūsha): MURATA Keizo 大阪市立大学, 大学院理学研究科, 教授 (90291591) ; KIKUCHI Koichi 首都大学東京, 理工学研究科, 教授 (40177796)
• Research Collaborator: IWASAKI Yoshiki ; KURITA Kenji ; KURODA Natsuki ; NONAMI Daiki
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 擬一次元伝導体 / 有機超伝導体 / 超伝導発現機構 / 熱伝導度 / 熱起電力

Outline of Final Research Achievements

This study was carried out to reveal the electronic state of the quasi-one-dimensional organic superconductor (DME)2I3, which conducts electricity only along one direction of its crystal very well, in its superconducting state below 0.5 K. We have developed a new system to measure thermal conductivity of small (~1 mm) and fragile crystal. Temperature dependence of its thermal conductivity was successfully determined. Thermoelectric power was also measured under pressure. We determined how free electrons change their motion under pressure by combining the present results and the previous magnetoresistance study.

Free Research Field

固体電気物性・輸送現象測定