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Two-dimensional spinodal interface in one-step grown graphene-molybdenum carbide heterostructures

Authors :
Lin He
Jinan Shi
Jia-Bin Qiao
Haiwen Liu
Lin Gu
Yue Gong
Source :
Physical Review Materials. 2
Publication Year :
2018
Publisher :
American Physical Society (APS), 2018.

Abstract

Heterostructures made by stacking different materials on top of each other are expected to exhibit unusual properties and new phenomena. Interface of the heterostructures plays a vital role in determining their properties. Here, we report the observation of a two-dimensional (2D) spinodal interface in graphene-molybdenum carbide ({\alpha}-Mo2C) heterostructures, which arises from spinodal decomposition occurring at the heterointerface, by using scanning tunneling microscopy. Our experiment demonstrates that the 2D spinodal interface modulates graphene into whispering gallery resonant networks filled with quasi-bound states of massless Dirac fermions. Moreover, below the superconducting transition temperature of the underlying {\alpha}-Mo2C, the 2D spinodal interface behaves as disorders, resulting in the breakdown of the proximity-induced superconductivity in graphene. Our result sheds new light on tuning properties of heterostructures based on interface engineering.<br />Comment: 4 figures in main text

Details

ISSN :
24759953
Volume :
2
Database :
OpenAIRE
Journal :
Physical Review Materials
Accession number :
edsair.doi.dedup.....2b8874009840c31088416bb9017bd270