Van der Waals heterostructures incorporating graphene, perovskites and other 2D materials
Lead Research Organisation:
University of Manchester
Department Name: Physics and Astronomy
Abstract
For the past decade, halide perovskites have been subject to tremendous interest from the material science community, due to their potential use in high efficiency solar cells and bright light-emitting devices. Some key attributes of these perovskite materials include cheap fabrication processes, strong absorption coefficients and low non-radiative carrier recombination rates. Recently, the synthesis of 2D halide perovskite crystals have been achieved, demonstrating promising stability properties, as well as large carrier mobilities and intense photo- and electro-luminescence.
2D materials have triggered an unparalleled momentum, driving research on a new class of materials: van der Waals heterostructures, consisting in different 2D crystals stacked on top of each-others. These artificial materials present new and intriguing electronic properties, taking advantage of the absence of long-range order, 2D excitons or many-bodies instabilities such as superconductivity, and allowing observation of quantum relativistic phenomena.
This project aims at creating van der Waals heterostructures by stacking 2D halide perovskite crystals in heterostructures with graphene and studying the electronic properties of the assembly. The new devices are expected to have a number of technologically important properties and have a realistic potential to contribute to innovative semiconductor technologies.
2D materials have triggered an unparalleled momentum, driving research on a new class of materials: van der Waals heterostructures, consisting in different 2D crystals stacked on top of each-others. These artificial materials present new and intriguing electronic properties, taking advantage of the absence of long-range order, 2D excitons or many-bodies instabilities such as superconductivity, and allowing observation of quantum relativistic phenomena.
This project aims at creating van der Waals heterostructures by stacking 2D halide perovskite crystals in heterostructures with graphene and studying the electronic properties of the assembly. The new devices are expected to have a number of technologically important properties and have a realistic potential to contribute to innovative semiconductor technologies.
Organisations
People |
ORCID iD |
Andre Geim (Primary Supervisor) | |
Julien Barrier (Student) |
Publications
Barrier J
(2020)
Long-range ballistic transport of Brown-Zak fermions in graphene superlattices
in Nature Communications
N. Xin
(2023)
Giant magnetoresistance of Dirac plasma in high-mobility graphene
in Nature
P Steiner
Electrically controlled heat transport in multilayer graphene
in preprint
Shi Y
(2020)
Electronic phase separation in multilayer rhombohedral graphite.
in Nature
Xu S
(2021)
Tunable van Hove singularities and correlated states in twisted monolayer-bilayer graphene
in Nature Physics
Description | van der Waals heterostructures combining graphene and boron nitride allow the creation of a periodic patterns called moiré superlattices. These superlattices change the electronic properties of the two materials with new fundamental physics emerging when combined. Particularly, we have shown that this allows the creation of new electronic states at high magnetic fields, through the ballistic propagation of a new family of quasiparticles : Brown-Zak fermions. We have shown the ballistic motions and straight trajectories of these quasiparticles, and studied the degeneracy with the introduction a new quantum number. Other research on this award include discovery of electronic phase separation and quantum hall effect in van der Waals heterostructures made with multilayer graphite. |
Exploitation Route | The Brown-Zak fermions are new high quality metallic states. Studying their properties at low temperatures in more details could be of particular interest in condensed matter physics for new basic discoveries. Applications could range from new electronic devices to high quality high frequency sources and detectors. |
Sectors | Electronics |
URL | https://physicsworld.com/a/new-family-of-quasiparticles-appears-in-graphene/ |
Description | Oxford Instruments Virtual Roadshow |
Form Of Engagement Activity | Participation in an activity, workshop or similar |
Part Of Official Scheme? | No |
Geographic Reach | Regional |
Primary Audience | Industry/Business |
Results and Impact | Oxford Instruments Nanoscience Virtual Roadshow - show to oxford instruments collaborators & clients examples of research feasible with their equipments. Talks about Brown-Zak fermions in graphene superlattices. invited twice. |
Year(s) Of Engagement Activity | 2020 |
URL | https://nanoscience.oxinst.com/virtual-roadshow/manchester-roadshow |
Description | Pint of Science 2019 |
Form Of Engagement Activity | Participation in an activity, workshop or similar |
Part Of Official Scheme? | No |
Geographic Reach | Local |
Primary Audience | Public/other audiences |
Results and Impact | Pint of Science is a worldwide science festival in which researchers talk in local pub/café/space to share their scientific discoveries and projects with the general public. |
Year(s) Of Engagement Activity | 2019 |
URL | https://pintofscience.co.uk/event/from-electrons-to-molecules |
Description | ballistic brown-zak fermions |
Form Of Engagement Activity | A press release, press conference or response to a media enquiry/interview |
Part Of Official Scheme? | No |
Geographic Reach | International |
Primary Audience | Media (as a channel to the public) |
Results and Impact | Press release + interviews about our research on Brown-Zak fermions: https://physicsworld.com/a/new-family-of-quasiparticles-appears-in-graphene/ https://www.labnews.co.uk/article/2030972/graphene-team-hurls-physics-out-the-window https://www.labnews.co.uk/article/2030993/a-research-story-advancing-mesoscopic-physics https://www.sciencedaily.com/releases/2020/11/201113075240.htm https://www.quora.com/q/sciencecommunication/Scientists-discover-new-family-of-quasiparticles-in-graphene-based-materials-A-group-of-researchers-have-discovered-and https://medium.com/@sciencebulletin/scientists-discover-new-family-of-quasiparticles-in-graphene-based-materials-6fe73edb7a88 https://ground.news/article/cda66760-5602-40cd-8aec-35de27f9154d https://scitechdaily.com/findings-to-help-achieve-holy-grail-of-2d-materials-superfast-electronic-devices/ https://www.eurekalert.org/pub_releases/2020-11/uom-mgd111220.php https://scienmag.com/manchester-group-discover-new-family-of-quasiparticles-in-graphene-based-materials/ |
Year(s) Of Engagement Activity | 2020 |
URL | https://www.manchester.ac.uk/discover/news/manchester-group-discovers-radically-different-physics-in... |