# Multifunctional 2D CuSe monolayer nanodevice

## TL;DR

This study uses first-principles calculations to explore the electronic, transport, and optical properties of a newly synthesized CuSe monolayer, revealing its potential for multifunctional nanodevices.

## Contribution

It provides the first theoretical analysis of CuSe monolayer's electronic transport and photoelectronic properties, highlighting its multifunctionality.

## Key findings

- Strong electrical anisotropy in CuSe ML
- Negative differential resistance beyond 1.0 V bias
- Large photon absorption to orange light

## Abstract

In a very recent experimental work [Gao et al., 2018 Adv. Mater. 30, 1707055], a graphene-like CuSe monolayer was realized. Motivated by this success, we performed first-principles calculations to investigate its electronic transport and photoelectronic properties. We find that the CuSe ML shows a strong electrical anisotropy, and its current-voltage (I-V) curves along the zigzag and armchair directions are noticeably different. The CuSe ML also displays a useful negative differential resistance (NDR) effect along the both directions when the bias is beyond 1.0 V. Moreover, it has a large photon absorption to orange light. Our study suggests that CuSe ML is a multifunctional material and has various potential applications in electrical-anisotropy-based, NDR-based, and even optical nanodevices.

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Source: https://tomesphere.com/paper/1904.08047