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Engineered Topological Superconductivity in van der Waals Heterostructures

Topological matter is a new research focus with great perspectives. These are insulators with an inverted negative bandgap and a conducting surface state. While the surface state in a topological insulator (TI) is composed of chir... ver más

31/12/2023

UNIVERSITAT BASEL

2M€

Presupuesto del proyecto: 2M€

Líder del proyecto

UNIVERSITAT BASEL No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Ver 2 Participantes

Financiación concedida El organismo H2020 notifico la concesión del proyecto el día 2023-12-31

ERC-2017-ADG: ERC Advanced Grant

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Cerrada hace 7 años

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2 Participantes

UNIVERSITAT BASEL

2.50M€ | Lider

LABIANA LIFE SCIENCES

635.82K€ | Participante

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Duración del proyecto: 68 meses Fecha Inicio: 2018-04-19
Fecha Fin: 2023-12-31

Líder del proyecto

UNIVERSITAT BASEL No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 2M€

Descripción del proyecto Topological matter is a new research focus with great perspectives. These are insulators with an inverted negative bandgap and a conducting surface state. While the surface state in a topological insulator (TI) is composed of chiral fermions carrying charge and spin, in topological superconductors it is pinned to zero energy due to particle-hole symmetry and composed of fermions that carry neither charge nor spin. In-stead, they are non-abelian fermions, Majorana and parafermions (MF/PF), that have been proposed for topological quantum computing. Evidence for MFs have been found in nanowires. However, the scaling-up challenge requires a platform in which networks of MFs can be realized. Here, we propose to use graphene-based van der Waals heterostructure for this purpose. The unprecedented versatility is enabled by combining high-mobility graphene with other layered materials, such as transition-metal dichalcogenide, few-layer ferromagnets and superconductors (SCs). This allows to design topological systems, e.g. the quantum spin, anomalous and valley Hall effect, by combining Zeeman energy, spin-orbit and pairing interaction. We will design 2D quantum matter using different approaches, including strain tuning and the dressing of the bandstructure by photon-fields (Floquet TI), and couple it to SCs to induce topological superconductivity. We will use our expertise from studies of Cooper-pair splitters to not only add pairing in a single edge-state, but also between different edge-states, beneficial in obtaining MFs and more exotic quasiparticles. We will apply advanced high-frequency techniques, e.g. emission and noise - in addition to local tunneling spectroscopy - to characterize the in-gap states and to prove their topological nature. We will deliver a versatile technology with which new states of matter can be obtained in a platform which can be engineered in a top-down manner into networks allowing for quantum-state manipulation of MFs and PFs.

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