Thickness evolution of transport properties in exfoliated Fe1+yTe nanoflakes. (26th June 2018)

• Record Type: Journal Article
• Authors: Hsieh, T-W; Zou, T; Hu, J; Mao, Z Q; Zhang, P P; Ke, X
• Is Part Of: Journal of physics. Volume 30:Number 29(2018)
• Publication Date: 2018-06-26
• Subjects: transport -- VRH model -- nanoflakes; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/aaca61
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: We report the evolution of transport properties in exfoliated Fe1+ y Te ( y = 0.04) nanoflakes of various thickness. In contrast to the sharp semiconducting-to-metallic phase transition observed in both bulk and thicker flakes, this transition becomes broadened for flakes with an intermediate thickness followed by the appearance of a superconducting-like feature upon further cooling. With the thickness further decreased, the flakes exhibit insulating transport behavior with significantly enhanced positive magnetoresistance, which can be explained using a variable range hopping mechanism, suggesting the nature of a highly disordered 2D system.