TranspvdW · Vertical Transport and Photoresponse in van der Waals hybrid structures
Horizon 2020 — Marie Skłodowska-Curie Actions
- Duration
- 2016-10-01 → 2018-09-30
- EU contribution
- €148,636
- Participants
- 1
- Scheme
- MSCA-IF-EF-ST
Lines connect the coordinator with its partners.
Results in brief
Vertical Transport and Photoresponse in van der Waals hybrid structures
Two-dimensional materials have emerged in recent years as a new class of materials, with great promise for technological applications. Besides displaying extraordinary mechanical, electronic and optical properties, due to the (quasi) all surface nature of these materials, their properties can be easily tuned by external parameters – an essential requirement for technological applications. Two-dimensional materials can also be combined to form layered structures, referred to as van der Waals (vdW) structures, which can combine properties from different materials, and display new ones, which are not manifested by the isolated layers. This opens up novel ways to engineer systems with new electronic and optical properties, which can be used in applications. However, the understanding and simulation of these materials poses significant difficulties. The overall objectives of TranspvdW are to: (i) Develop methods to model layered structures and use them to study the spectral and electronic transport properties of layered structures (ii) Study the iteration of light with two-dimensional and layered materials. It was concluded that the electronic transport properties of layered structures depend drastically on the way different layers are aligned. It was also concluded that the structure of the electrons wavefunction plays an important role in the highly non-linear current that is generated in two-dimensional materials, when these are illuminated by very intense light.
Data: CORDIS, © European Union
Project objective
Van der Waals (vdW) hybrid structures, new systems formed by stacking layers of two-dimensional crystals on top of each other, are a promising route towards the tailoring of material properties at will. Understanding the properties of individual layers and how they interact with each other to obtain the desired properties is the main focus of both experimental and theoretical research of the community working in this area. Due to the extreme high quality, atomically sharp, interfaces between different layers in vdW structures, lattice mismatch and the relative alignment between consecutive layers play a fundamental role in determining the properties of the vdW structure, governing the electronic coupling between different layers. Graphene – insulator/semiconductor – graphene vdW structures have recently received a lot of attention from the community, due to its potential for applications, having been shown to operate both as transistors and photodetectors. It is not clear however how device operation is affected by lattice mismatch effects. The aim of this project is to develop theory and models, both analytical and numerical, to describe the vertical current and photocurrent generation, both in the steady state and in the transient regime, of the vdW hybrid structures referred above. Special attention will be given to the effect of lattice mismatch and crystal-momentum conservation in the vertical current flow. In the duration of this project, Bruno Amorim will work under the supervision of Prof. Eduardo V. Castro in the multidisciplinary environment provided by the Center of Physics and Engineering of Advanced Materials at Instituto Superior Técnico, in Portugal. This project will generate high impact results, useful in interpreting current and future experimental results and in guiding the design of new vdW devices. As such, this project will greatly contribute to the career development of the applicant.
Original text from CORDIS.
Participants
- INSTITUTO SUPERIOR TECNICO · LisboaCoordinatorPortugal
Links
Data: CORDIS, © European Union