Chemical Vapor Deposition of Superconducting FeTe1-xSex Nanosheets.

Nano Letters
Dianyi HuZheng Liu

Abstract

FeTe1-xSex, a promising layered material used to realize Majorana zero modes, has attracted enormous attention in recent years. Pulsed laser deposition (PLD) and molecular-beam epitaxy (MBE) are the routine growth methods used to prepare FeTe1-xSex thin films. However, both methods require high-vacuum conditions and polished crystalline substrates, which hinder the exploration of the topological superconductivity and related nanodevices of this material. Here we demonstrate the growth of the ultrathin FeTe1-xSex superconductor by a facile, atmospheric pressure chemical vapor deposition (CVD) method. The composition and thickness of the two-dimensional (2D) FeTe1-xSex nanosheets are well controlled by tuning the experimental conditions. The as-prepared FeTe0.8Se0.2 nanosheet exhibits an onset superconducting transition temperature of 12.4 K, proving its high quality. Our work offers an effective strategy for preparing the ultrathin FeTe1-xSex superconductor, which could become a promising platform for further study of the unconventional superconductivity in the FeTe1-xSex system.

References

Dec 1, 1992·Physical Review. B, Condensed Matter·W Yu, D Stroud
Feb 26, 2008·Journal of the American Chemical Society·Yoichi KamiharaHideo Hosono
Mar 21, 2013·Nature Chemistry·Manish ChhowallaHua Zhang
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Aug 18, 2018·Science·Dongfei WangHong-Jun Gao

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Citations

Nov 7, 2021·Environmental Science and Pollution Research International·Luis A González-BurciagaJosé B Proal-Nájera

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