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Article Dans Une Revue Nature Materials Année : 2019

Disorder in van der Waals heterostructures of 2D materials

Résumé

sources of disorder that can obscure intrinsic properties and hinder device performance. Here we examine progress in understanding and reducing both intrinsic and extrinsic disorder in two-dimensional (2D) graphene and transition metal dichalcogenides (TMDs) incorporated into layered van der Waals heterostructures. In the case of mechanically exfoliated graphene, the dominant disorder is extrinsic and can be reduced by encapsulation within crystalline hexagonal boron nitride (hBN). Continuing improvement in encapsulation and device fabrication techniques has led to dramatic performance improvement and enabled the study of a wide range of novel phenomena. In the case of TMDs, both extrinsic and intrinsic disorder are relevant. The electronic and optical performance of semiconducting TMDs improves with the reduction of external disorder, but commonly used materials show high defect density which must be reduced to enable similar progress as demonstrated in graphene. These atomic defects can also be harnessed to provide useful electronic, optical,chemical, and magnetic properties.
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Dates et versions

hal-02335515 , version 1 (28-10-2019)

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Daniel Rhodes, Sang Hoon Chae, Rebeca Ribeiro-Palau, James Hone. Disorder in van der Waals heterostructures of 2D materials. Nature Materials, 2019, ⟨10.1038/s41563-019-0366-8⟩. ⟨hal-02335515⟩

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