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19 April 2024 |
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Article overview
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Studies on the origin of the interfacial superconductivity of Sb2Te3/Fe1+yTe heterostructures | | Jing Liang
; Yu Jun Zhang
; Xiong Yao
; Hui Li
; Zi-Xiang Li
; Jiannong Wang
; Yuanzhen Chen
; Iam Keong Sou
; | | Date: |
15 Aug 2019 | | Abstract: | The recent discovery of the interfacial superconductivity (SC) of the
Bi2Te3/Fe1+yTe heterostructure has attracted extensive studies due to its
potential as a novel platform for trapping and controlling Majorana fermions.
Here we present studies of another topological insulator (TI)/Fe1+yTe
heterostructure, Sb2Te3/Fe1+yTe, which also enjoys an interfacial
two-dimensional SC. The results of transport measurements support that the
reduction of excess Fe concentration of the Fe1+yTe layer not only increases
the fluctuation of its antiferromagnetic (AFM) order but also enhances the
quality of the SC of this heterostructure system. On the other hand, the
interfacial SC of this heterostructure was found to have a wider-ranging
TI-layer thickness dependence than that of the Bi2Te3/Fe1+yTe heterostructure,
which is believed to be attributed to the much higher bulk conductivity of
Sb2Te3 that enhances indirect coupling between its top and bottom topological
surface states (TSSs). Our results provide the evidence of the interplay among
the AFM order, itinerant carries from the TSSs and the induced interfacial SC
of the TI/Fe1+yTe heterostructure system. | | Source: | arXiv, 1908.5486 | | Services: | Forum | Review | PDF | Favorites | |
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