Issue 29, 2017

Electric field-tunable electronic structures of 2D alkaline-earth metal hydroxide–graphene heterostructures

Abstract

Based on first-principles calculations, we study the electronic structures of 2D alkaline-earth metal hydroxide X(OH)2/graphene (X = Ca, Mg) heterostructures. The results show that the characteristics of the band gap size of X(OH)2 and Dirac cone of graphene are preserved well, and p-type Schottky barriers with a small Schottky barrier height (SBH) are formed in the hetero-multilayers. Moreover, double Dirac cones are also found in the X(OH)2/bilayer graphene (X(OH)2/BLG) cases. Interestingly, negative electric fields can easily induce the transition from p-type Schottky to Ohmic contact, while the p-type to n-type Schottky transition can be realized by positive electric fields. In addition, the electric field-modulations of the Schottky barrier are more sensitive in the X(OH)2/BLG systems. These studies may open the possibility of using X(OH)2/graphene as building blocks in the fabrication of Schottky devices.

Graphical abstract: Electric field-tunable electronic structures of 2D alkaline-earth metal hydroxide–graphene heterostructures

Article information

Article type
Paper
Submitted
24 May 2017
Accepted
25 Jun 2017
First published
26 Jun 2017

J. Mater. Chem. C, 2017,5, 7230-7235

Electric field-tunable electronic structures of 2D alkaline-earth metal hydroxide–graphene heterostructures

C. Xia, Q. Gao, W. Xiong, J. Du, X. Zhao, T. Wang, Z. Wei and J. Li, J. Mater. Chem. C, 2017, 5, 7230 DOI: 10.1039/C7TC02288C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements