A5063568523- 2D Materials and Applications
- Graphene research and applications
- Ferroelectric and Piezoelectric Materials
- Energy Harvesting in Wireless Networks
- Gas Sensing Nanomaterials and Sensors
- Diamond and Carbon-based Materials Research
- Acoustic Wave Resonator Technologies
- Modular Robots and Swarm Intelligence
- ZnO doping and properties
- Dust and Plasma Wave Phenomena
- Pickering emulsions and particle stabilization
- Quantum and electron transport phenomena
- Supramolecular Self-Assembly in Materials
- Advanced Sensor and Energy Harvesting Materials
- Ga2O3 and related materials
- Advanced Memory and Neural Computing
- Electronic and Structural Properties of Oxides
- Ferroelectric and Negative Capacitance Devices
Henry Royce Institute
2020-2024
University of Manchester
2020-2024
Abstract Twisted heterostructures of two-dimensional crystals offer almost unlimited scope for the design new metamaterials. Here we demonstrate a room temperature ferroelectric semiconductor that is assembled using mono- or few-layer MoS 2 . These van der Waals feature broken inversion symmetry, which, together with asymmetry atomic arrangement at interface two 2D crystals, enables domains alternating out-of-plane polarization arranged into twist-controlled network. The last can be moved by...
Abstract Van der Waals heterostructures are fabricated by layer-by-layer assembly of individual two-dimensional materials and can be used to create a wide range electronic devices. However, current techniques typically use polymeric supports, which limit the cleanliness—and thus performance—of such Here, we report polymer-free technique for assembling van using flexible silicon nitride membranes. Eliminating supports allows in harsher environmental conditions (incompatible with polymer) as...
Abstract Van der Waals heterostructures have opened new opportunities to develop atomically thin (opto)electronic devices with a wide range of functionalities. The recent focus on manipulating the interlayer twist angle has led observation out-of-plane room temperature ferroelectricity in twisted rhombohedral bilayers transition metal dichalcogenides. Here we explore switching behaviour sliding using scanning probe microscopy domain mapping and tunnelling transport measurements. We observe...
Suspended specimens of 2D crystals and their heterostructures are required for a range studies including transmission electron microscopy (TEM), optical experiments, nanomechanical testing. However, investigating the properties laterally small crystal specimens, twisted bilayers air-sensitive materials, has been held back by difficulty fabricating necessary clean suspended samples. Here we present scalable solution that allows free-standing to be realized with 100% yield dry-stamping...
Abstract Coulomb drag between adjacent electron and hole gases has attracted considerable attention, being studied in various two-dimensional systems, including semiconductor graphene heterostructures. Here we report measurements of electron–hole the Planckian plasma that develops monolayer vicinity its Dirac point above liquid-nitrogen temperatures. The frequent scattering forces minority carriers to move against applied electric field due induced by majority carriers. This unidirectional...
Van der Waals (vdW) heterostructures have opened new opportunities to develop atomically thin (opto)electronic devices with a wide range of functionalities. The recent focus on manipulating the interlayer twist angle has led observation out-of-plane room temperature ferroelectricity in twisted rhombohedral (R) bilayers transition metal dichalcogenides (TMDs). Here we explore switching behaviour sliding using scanning probe microscopy domain mapping and tunnelling transport measurements. We...
Coulomb drag between adjacent electron and hole gases has attracted considerable attention, being studied in various two-dimensional systems, including semiconductor graphene heterostructures. Here we report measurements of electron-hole the Planckian plasma that develops monolayer vicinity its Dirac point above liquid-nitrogen temperatures. The frequent scattering forces minority carriers to move against applied electric field due induced by majority carriers. This unidirectional transport...
Twisted two-dimensional (2D) material heterostructures provide an exciting platform for investigating fundamental physical phenomena. Many of the most interesting behaviors emerge at small twist angles, where materials reconstruct to form areas perfectly stacked crystals separated by partial dislocations. However, understanding properties these systems is often impossible without correlative imaging their local reconstructed domain configuration, which exhibits random variations due disorder...
Layer-by-layer assembly of van der Waals (vdW) heterostructures underpins new discoveries in solid state physics, material science and chemistry. Despite the successes, all current 2D (2DM) transfer techniques rely on use polymers which limit cleanliness, ultimate electronic performance, potential for optoelectronic applications heterostructures. In this article, we present a novel polymer-free platform rapid facile heterostructure utilises re-usable flexible silicon nitride membranes. We...