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25 April 2024 |
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Proximity-Induced Superconductivity in a Topological Crystalline Insulator | | Bryan Rachmilowitz
; He Zhao
; Hong Li
; Alex LaFleur
; J. Schneeloch
; Ruidan Zhong
; Genda Gu
; Ilija Zeljkovic
; | | Date: |
18 Nov 2019 | | Abstract: | Superconducting topological crystalline insulators (TCI) are predicted to
host new topological phases protected by crystalline symmetries, but available
materials are insufficiently suitable for surface studies. To induce
superconductivity at the surface of a prototypical TCI SnTe, we use molecular
beam epitaxy to grow a heterostructure of SnTe and a high-Tc superconductor
Fe(Te,Se), utilizing a ’buffer’ layer to bridge the large lattice mismatch
between SnTe and Fe(Te,Se). Using low-temperature scanning tunneling microscopy
and spectroscopy, we measure a prominent spectral gap on the surface of SnTe,
and demonstrate its superconducting origin by its dependence on temperature and
magnetic field. Our work provides a new platform for atomic-scale
investigations of emergent topological phenomena in superconducting TCIs. | | Source: | arXiv, 1911.7798 | | Services: | Forum | Review | PDF | Favorites | |
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