HEИндивидуална стипендия2023–2025

ILLUME · Infrared vaLLey control of moiré qUantum MatErials

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

Период: 2023-06-19 → 2025-06-18
Финансиране от ЕС: 181 153 €
Участници: 1
Схема: HORIZON-TMA-MSCA-PF-EF

Линиите свързват координатора с партньорите.

Накратко на български

Моаре материалите се изследват чрез облъчване с инфрачервена и терахерцова светлина, за да се промени поведението на електроните в тях. Това помага за разбирането на квантовата геометрия и създаването на нови оптоелектронни устройства.

Този кратък обзор е генериран от изкуствен интелект

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

Резултати накратко

Infrared vaLLey control of moiré qUantum MatErials

The ILLUME project aimed at creating, manipulating and exploring novel phases with non-trivial topology and interplay between topology and electron-electron interactions in moiré materials. For this purpose, the project combined electronic transport techniques with polarisation-resolved mid-infrared (mid-IR) and terahertz (THz) excitations. The technique consists in irradiating a 2D material with mid-IR or THz continuous waves excitations under various conditions of power and polarisation and map the electronic response of moiré materials. The IR and THz wavelengths are particularly well suited for the study of moiré materials, as the photon energies are comparable to the inter- and intra-band transitions. The project was expected to significantly advance the fundamental understanding of strongly correlated electron systems, quantum geometry, and the critical role of lattice reconstruction in moiré materials. It was also expected to result in novel optoelectronic devices taking advantage of the unique absorptions of graphene-based heterostructures in these energy ranges.

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

Цел на проекта

A key ingredient governing the behaviour of electron dynamics in condensed matter systems is the valley degree of freedom. This fellowship aims at inducing topological (or valley-polarised) electronic phases in moiré systems and explore their tunability. Moiré quantum materials present a high degree of tunability as the ratio between interaction strength and electronic bandwidth can be optimised, resulting in flat bands and correlated electronic states. Control of such phases with circularly polarised light would allow to understand the valley-polarisation, topological protection, and the mechanisms underlying the emergence of flat-band superconductivity and correlated insulators. The project will use an interdisciplinary methodology combining electronic transport techniques with infrared far-field irradiation and near field imaging, to create, manipulate and explore novel phases with non-trivial topology (valley polarisation) in moiré materials. The researcher will conduct transport measurement with circularly polarised light to selectively induce inter-valley scattering in 1D channels and explore superconducting interferences in this regime. The project will also quantify the influence of circularly polarised light (CPL) on the superconducting phases and correlated insulators in flat band moiré systems, in order to comprehend the interplay of strongly correlated electronic states with CPL and understand their origin. The fellowship will control and explore novel phases with non-trivial topology in moiré materials, providing new understanding of valley-polarised phases. This objective is a steppingstone towards the creation of new optoelectronic devices such as photonic diodes, optical transistors and logic circuits, and could lead to new concepts as topological nanophotonics for optical information processing.

Оригинален текст от CORDIS (на английски).

Участници

FUNDACIO INSTITUT DE CIENCIES FOTONIQUES · CastelldefelsКоординаторИспания