Superconductivity in alkali-doped fullerene nanowhiskers. (7th July 2016)

• Record Type: Journal Article
• Authors: Takeya, Hiroyuki; Konno, Toshio; Hirata, Chika; Wakahara, Takatsugu; Miyazawa, Kun'ichi; Yamaguchi, Takahide; Tanaka, Masashi; Takano, Yoshihiko
• Is Part Of: Journal of physics. Volume 28:Number 35(2016)
• Publication Date: 2016-07-07
• Subjects: fullerene -- nanowhisker -- alkali metal -- intercalation -- superconductor; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/0953-8984/28/35/354003
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: Superconductivity in alkali metal-doped fullerene nanowhiskers (C60 NWs) was observed in K3.3 C60 NWs, Rb3.0 C60 NWs and Cs2.0 Rb1.0 C60 NWs with transition temperatures at 17, 25 and 26 K, respectively. Almost full shielding volume fraction (~80%) was observed in K3.3 C60 NWs when subjected to thermal treatment at 200 °C for a duration of 24 h. In contrast, the shielding fraction of Rb3.0 C60 NWs and Cs2.0 Rb1.0 C60 NWs were calculated to be 8% and 6%, respectively. Here we report on an extensive investigation of the superconducting properties of these A C60 NWs ( A = K3.3, Rb3.0 and Cs2.0 Rb1.0 ). These properties are compared to the ones reported on the corresponding conventional (single-crystal or powder) K-doped fullerene. We also evaluated the critical current densities of these C60 NWs using the Bean model under an applied magnetic field up to 50 kOe.