Work

Ab initio modeling framework for Majorana transport in 2D materials: towards topological quantum computing

Year: 2020

Type: conference-paper

Abstract: We present an ab initio modeling framework to simulate Majorana transport in 2D semiconducting materials, paving the way for topological qubits based on 2D nanoribbons. By combining density-functional-theory and quantum transport calculations, we show that the signature of Majorana bound states (MBSs) can be found in 2D material systems as zero-energy modes with peaks in the local density-of-states. The influence of spin-orbit coupling and external magnetic fields on Majorana transport is studied for two relevant 2D materials, WSe2and PbI2. To illustrate the capabilities of the proposed ab initio platform, a device structure capable of hosting MBSs is created from a PbI2nanoribbon and carefully investigated. These results are compared to InSb nanowires and used to provide design guidelines for 2D topological qubits.

Source: Technical digest - International Electron Devices Meeting/Technical digest

DOI: 10.1109/iedm13553.2020.9371923

Authors: Y. Lee, T. Agarwal, M. Luisier

Institutions: ETH Zurich, Integrated Systems Laboratory

Language: English

Topic: Topological Materials and Phenomena

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Centro Svizzero di Calcolo Scientifico

Award: Ab-initio modeling of electro-thermal effects in 2-D materials: from single-layer to van der Waals heterostructure (ABIME)