Evidence for nodal superconductivity in a layered compound Ta4Pd3Te16. (9th January 2018)

• Record Type: Journal Article
• Authors: Pang, Guiming; Smidman, Michael; Jiao, Wenhe; Jiao, Lin; Weng, Zongfa; Jiang, Wenbing; Guo, Chunyu; Chen, Ye; Cao, Guanghan; Yuan, Huiqiu
• Is Part Of: Journal of physics. Volume 30:Number 5(2018)
• Publication Date: 2018-01-09
• Subjects: superconducting order parameter -- London penetration depth -- line nodes; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/aaa3b6
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: We report an investigation of the London penetration depth Δ λ ( T ) on single crystals of the layered superconductor Ta4 Pd3 Te16, where the crystal structure has quasi-one-dimensional characteristics. A linear temperature dependence of Δ λ ( T ) is observed for T ≪ T c, in contrast to the exponential behavior of fully gapped superconductors. This indicates the existence of line nodes in the superconducting energy gap. A detailed analysis shows that the normalized superfluid density ρ s ( T ), which is converted from Δ λ ( T ), can be well described by a multigap scenario, with nodes in one of the superconducting gaps, providing clear evidence for nodal superconductivity in Ta4 Pd3 Te16 .