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Spintronics with epitaxial 2D materials and topological insulators

ABG-100592 Thesis topic
2021-10-14 Public funding alone (i.e. government, region, European, international organization research grant)
Université Grenoble Alpes
Grenoble - Auvergne-Rhône-Alpes - France
Spintronics with epitaxial 2D materials and topological insulators
  • Physics
  • Materials science

Topic description

Following the discovery of graphene, a large number of two-dimensional nanomaterials have been uncovered, in which confinement gives rise to extraordinary electronic, optical and magnetic properties expected to revolution microelectronics. These materials span a wide range of properties (metals, insulators, semiconductors, superconductors, etc.) Thanks to their layered structure, they can be stacked in multilayers in order to design devices with enhanced functionalities for future electronics.
In particular, transition metal dichalcogenides (MoS2, WSe2, etc.) and topological insulators (Bi2Se3, Bi2Te3) are highly promising materials for spintronics. They are characterized by a remarkably intense spin-orbit interaction that couples the electron momentum and spin. This coupling can be used to manipulate spins with electric fields, to convert charge currents into spin currents through the Edelstein effect, and gives rise to novel magnetoresistive effects. Beyond the emerging new physics of "spin-orbitronics", these phenomena are expected to find applications in novel energy-efficient magnetic memories; for this reason, they are currently attracting considerable attention. However, they have only been studied in microflakes prepared by a manual and poorly reproducible top-down approach.

Funding category

Public funding alone (i.e. government, region, European, international organization research grant)

Funding further details

Presentation of host institution and host laboratory

Université Grenoble Alpes

The "2D and Semiconductor Spintronics" team at Spintec is one of the first European groups able to fabricate and combine these materials by molecular beam epitaxy (MBE). The thesis aims at growing 2D materials by MBE, then evidencing and investigating the electrical manifestations of the strong spin-orbit coupling in these layers with complementary magnetotransport measurements (Hall measurements, current-induced ferromagnetic resonance and spin pumping). In order to enhance interfacial effects, the student will study ultimately thin layers (down to a single atomic sheet) as well as promising materials uncovered in the past two years : 2D ferromagnets (in particular FexGeTe2 alloys). The student will also be involved in collaborations with teams in Grenoble (CEA/LETI) and Barcelona (ICN2).

Candidate's profile

Academic background:

Applicants must hold a Master's degree in Physics or have a university degree equivalent to a European Master's (5-year duration).

Expected skills:

Taste for experimental physics, good autonomy and communication skills. Previous knowledge of spintronics and/or techniques related to thin films growth and characterization will be appreciated.

Desired professional experience: NA

 

Applicants will have to send their application at the latest on November 5th, 2021 at 17:00 (CET) to frederic.bonell@cea.fr

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