Novel aspects of organic superconductors: NMR and magnetic susceptibility

✍ Scribed by Toshihiro Takahashi; Kazushi Kanoda; Gunzi Saito

• Book ID: 103945204
• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 392 KB
• Volume: 185-189
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(91)92001-r

✦ Synopsis

Unconventional

natures of the superconductivity in the organic superconductors, <-(BEDT-TrF) 2-Cu(NCS) 2 and K-(BEDT-TTF)2CuN[(CN)2]Br, were revealed by complex susceptibility and IH-NMR relaxation measurements. The temperature dependence of magnetic-field penetration depth, ~, in both compounds was found to follow a power law at low temperatures, instead of an exponential behavior expected in the BCS theory. These results strongly suggest anisotropic superconductivity of gapless nature. The existence of new relaxation mechanism related to vortex dynamics in the superconducting state was confirmed.