H2020Индивидуална стипендия2019–2021

OptoTransport · Light-enabled transport phenomena in van der Waals heterostructures

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2019-04-01 → 2021-03-31
Финансиране от ЕС: 191 149 €
Участници: 1
Схема: MSCA-IF-EF-ST

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Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Light-enabled transport phenomena in van der Waals heterostructures

One of the fundamental goals of solid state physics is to study and discover emergent phenomena in electronic systems. Atomically thin crystals, that fall into the broader category of two-dimensional (2D) materials, have generated a tremendous amount of interest in the last decade due to their remarkable properties which result in a plethora of new effects, such as unconventional superconductivity and correlated insulating phases. In particular, a new family of 2D semiconductors, known as Transition Metal Dichalcogenides (TMD), have garnered attention as they not only offer possibilities to study electronic states, but also optically excited particles such as electron-hole pairs known as excitons. In this context, the broader objective of our project was to explore the interplay between optical and electronic excitations, and study collective of their mixtures. Specifically, we were motivated by the question, can we modify the electronic properties of the system, and induce new effects by shining light on it? To achieve this, we proposed to harness the quantum mechanical interactions between excitons and electrons in TMD monolayers to create new hybrid light-matter states. One of the main goals of the project was to achieve light-induced transport effects in a TMD monolayer system. This could potentially have revolutionary impact in the field, both from a fundamental physics and technology perspective. New devices can be envisioned where incident photons switch the collective state of the system, which may have implications for sensors and quantum information platform.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

Van der Waals heterostructures consisting of atomically thin materials, such as graphene and Transition metal dichalcogenides (TMD), have generated a tremendous amount of excitement in physics over the past decade. Embedding these systems in optical cavities leads to new hybrid excitations, known as exciton-polaritons, which govern the properties of the light-matter system. In this action, we aim to harness the unique properties of monolayer materials to explore exotic many-body phenomena that emerge due to the complex interplay of optical and electronic excitations. First, we plan to develop a new prototyping platform to rapidly and deterministically prepare high-quality van der Waals heterostructures, which will allow us to investigate a wider range of parameters than ever before. Our broad physics goal is to understand how electron transport is influenced by the presence of exciton-polaritons in different scenarios. In the first set of experiments, we will investigate polaron physics in a Bose-Fermi mixture formed by electrons and polaritons in a single TMD monolayer from a transport perspective. This will subsequently pave the way to exploring novel approaches to enhance interactions between electrons using exciton-polaritons as a mediator. A potentially ground-breaking consequence of our work will be the light-induced modification of transport properties of the system and in particular the enhancement of the critical temperature for superconductivity. The proposed research will therefore have a significant impact on our understanding of transport phenomena.

Оригинален текст от CORDIS (на английски).

Участници

EIDGENOESSISCHE TECHNISCHE HOCHSCHULE ZUERICH · ZuerichКоординаторШвейцария